Explorer 538/538i
Chartplotter
Installation and Operation Manual
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Important
It is your sole responsibility to install and use Northstar’s instrument and GPS antenna in a manner that
will not cause accidents, personal injury or property damage. Always observe safe boating practices.
The choice, location, angle and installation of the instrument & GPS antenna are critical to
performance of the system as intended. Follow instructions in this manual carefully. If in doubt,
consult your Northstar dealer.
Ensure that any holes cut are in a safe position and will not weaken the boat’s structure. If in doubt,
consult a qualified boat builder.
Global Position System: The global Position System (GPS) is operated by the U.S. Government
which is solely responsible for its operation, accuracy and maintenance. The GPS is subject to changes
which could affect the accuracy and performance of all GPS equipment anywhere in the world. To
reduce the risk of misusing or misinterpreting the Explorer, you must read and understand all aspects
of this Installation & Operation Manual. We also recommend that you practice all operations using the
built-in simulator before using the Explorer.
Electronic Chart: The electronic chart used by Explorer is an aid to navigation designed to
supplement, not replace official government charts. Only official government charts supplemented
by notices to mariners contain the information required for safe and prudent navigation, Always
supplement the electronic information provided by Explorer with other plotting sources such as
observations, depth soundings, radar and hand compass bearings. Should the information not agree,
the discrepancy must be resolved before proceeding any further.
Fuel Computer: Do not rely on the fuel computer as the sole source of information regarding
available fuel onboard. Fuel economy can change drastically depending on boat loading and sea
conditions. Fuel Computer information should be supplemented by visual or other checks of the fuel
load. This is necessary due to possible operator errors such as forgetting to reset the fuel used when
filling the tank, running the engine with the Fuel Computer not switched on, or on other operator
actions that may render the device inaccurate. Always carry adequate fuel onboard for the intended
trip, plus a reserve to allow for unforeseen circumstances.
Failure to adhere to these warnings may lead to death, serious injury or property damage.
Northstar disclaims all liability for installation or use of this product that causes or
contributes to death, injury or property damage or that violates any law.
As Northstar is continuously improving this product we retain the right to make changes to the
product at any time which may not be reflected in this version of the manual. Please contact your
nearest Northstar office if you require any further assistance.
Industry Canada
Operation is subject to the following two conditions: (1) this device may not cause interference,
and (2) this device must accept any interference, including interference that may cause undesired
operation of the device.
The Explorer is set up with default units of feet, °F (Fahrenheit), US gallons and knots.
To change the units, see section 14-8.
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Contents
Important ................................................................................................................................................ 3
Quick reference ........................................................................................................................................ 6
1 Introduction .......................................................................................................................................... 7
1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-2 Cleaning and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-3 Plug-in cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-4 Removing and replacing the display unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Basic Operation...................................................................................................................................... 9
2-1 Using the keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2-2 Using the menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2-3 Turning on and off / auto power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2-4 Backlight and night mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2-5 Man overboard (MOB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2-6 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2-7 Simulate mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2-8 The main displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Navigation: Chart................................................................................................................................. 16
3-1 Overview of navigating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3-2 Chart display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3-3 Distance and bearing calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3-4 Projected course . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3-5 Tracks and tracking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Navigation: Highway display................................................................................................................ 22
5 Navigation: Waypoints......................................................................................................................... 22
5-1 Waypoints display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5-2 Managing waypoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6 Navigation: Routes .............................................................................................................................. 25
6-1 Routes display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6-2 Managing routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
7 Satellites ............................................................................................................................................. 28
7-1 Satellite display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
4
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8 Gauges display..................................................................................................................................... 30
9 Data display......................................................................................................................................... 31
10 Fuel functions and display.................................................................................................................. 31
10-1 When you add or remove fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10-2 Fuel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10-3 Fuel consumption curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10-3-2 Managing fuel consumption curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
11 Tides display ...................................................................................................................................... 35
12 User card display ................................................................................................................................ 36
13 About display ..................................................................................................................................... 37
14 Setting up the Explorer 538/538i ........................................................................................................ 38
14-1 Setup > System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
14-2 Setup > Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
14-3 Setup > GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
14-4 Setup > Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
14-5 Setup > Track. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
14-6 Setup > Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
14-7 Setup > Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
14-8 Setup > Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
14-9 Setup > Comms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
14-10 Setup > Calibrate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
14-11 Setup > Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
14-12 Setup > Simulate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
15 Installation ........................................................................................................................................ 49
15-1 Installation: What comes with the Explorer 538/538i . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
15-2 Installation: Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
15-3 Installation: The display unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
15-4 Installation: Power/Data cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
15-5 Installation: GPS antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
15-6 Installation: Northstar petrol/gasoline sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
15-7 Installation: SmartCraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
15-8 Installation: Other NavBus instruments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
15-9 Installation: Other NMEA instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
15-10 Installation: Setup and test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
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5
Appendix A - Specifications..................................................................................................................... 56
Appendix B - Troubleshooting................................................................................................................. 58
Appendix C - Glossary and navigation data.............................................................................................. 61
Quick reference
Feature
Type
See
Requires
General
How to use the keys and displays
Troubleshooting
2
Appendix B
2-6
Simulate mode
Glossary of special names
Specifications
Appendix C
Appendix A
2-4
MOB
Man overboard key
Navigation
Overview of how to navigate
Finding the boat’s position on the chart
Navigate to any point or to a waypoint
Navigate along a route
3-1
3-2
3-1
3-1
3-4
3-5
7
GPS fix
Projected course: An estimate of progress
Tracks: records of where the boat has been
GPS receiver status
Saving and loading data with a user card
Chart features (built in world chart)
Chart details
12
User card
Chart data
3-2
3-2-4 & 5 C-MAP™ chart
Tides at a port
11
C-MAP™ chart
Alarms
Built in alarms
2-5
1-1
2-7-2
2-7-3
9
SmartCraft engine alarms
Data at top of main displays
Compass at top of main displays
Dedicated data display
SmartCraft
Boat data
Fuel
Fuel computer, petrol/gasoline engine
Fuel computer, SmartCraft engines
What to do when you add or remove fuel
10
Fuel sensors
SmartCraft
10
10-1
6
Northstar Explorer 538i/538 Installation and Operation Manual
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1 Introduction
1-1 Overview
The Northstar Explorer 538 is a compact, rugged,
highly integrated marine chartplotter. It is easy to
use and has a Color display. Complex functions
can be performed with a few key presses, taking
the hard work out of boating.
SmartCraft engine functions require a
SmartCraft system to be installed. For
information on using SmartCraft, see
the SmartCraft Gateway Installation and
Operation Manual.
This manual covers:
The Explorer can send data to other
instruments, such as an autopilot, and receive
data from other instruments.
Explorer 538
Color display, external GPS antenna.
Explorer 538i
For information on installing options, see section
15-2.
Color display, interrnal GPS antenna.
This manual describes how to install and operate
the Explorer 538/538i. Special terms are explained
in Appendix C. For maximum benefit, please read
this manual carefully before installing and using
the unit. For more information on this instrument
and other Northstar products, go to our website,
The available functions, displays and setup
menus depend on the optional sensors and
instruments that are installed:
Fuel functions require one or more
petrol/gasoline sensors to be installed.
1-2 Cleaning and maintenance
To optimize performance, avoid walking on or
jamming cables and connectors.
The Explorer 538/538i screen is covered by a
proprietary anti-reflection coating. To avoid
damage, clean the screen only with a damp cloth
and mild detergent when dirty or covered in
sea salt. Avoid abrasive cleaners, petrol or other
solvents. If a plug-in card gets dirty or wet, clean
it with a damp cloth or mild detergent.
Push the dust cover over the display when the
Explorer 538/538i is turned off.
1-3 Plug-in cards
C-MAP™ user cards are used to store
navigation data. Each user card expands the
Explorer 538/538i memory and allows the
data to be transferred to another Explorer
538/538i easily (see section 14).
The Explorer 538/538i can use two kinds of
plug-in card:
C-MAP™ chart cards have chart details
required for navigating in a particular region.
When a chart card is plugged in, the extra
details automatically appear on the Explorer
538/538i chart display.
Note: The older 5 volt user cards are not
supported.
The Explorer 538/538i can use NT, NT+ and
NT-MAX cards.
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Changing the plug-in card
Handle plug-in cards carefully. Keep them in their protective cases when not plugged into the
Explorer 538/538i.
Keep the holder in place in the Explorer 538/538i at all times to prevent moisture from entering the
card compartment.
Gold contacts under here
3
1
2
Card
Holder
Turn the Explorer 538/538i off (see section 2-3).
Push new card into holder. Ensure the gold
contacts are on the outer edge and underneath
(see above).
Pull the card holder out of the Explorer 538/538i
and pull any card out of holder.
Keep the card’s case.
Put the card in its case.
Push card holder fully into Explorer 538/538i
1-4 Removing and replacing the display unit
If the display unit is bracket mounted then the
display unit can easily be removed and replaced
for security or protection.
Removing the display unit:
1
2
3
Turn the display unit off (see section 2-3) and
put the dust cover on.
Loosen the knob on the mounting bracket
and lift the unit off the bracket.
Knob
Unplug the connectors from from the
display unit, turning each locking collar
anticlockwise. Push the attached dust covers
over the connectors.
Mounting
bracket
Insert each connector and turn the locking
collar clockwise until it is finger tight.
4
Store the display unit in a dry clean place,
such as the optional Northstar carry bag.
Nothing will be damaged if a cable is
Replacing the display unit
plugged into the wrong socket by mistake.
1
Remove the dust covers from the connectors.
Plug the connectors into the back of the
display unit:
2
Hold the display unit in place on the
mounting bracket. Adjust the tilt of the
display for best viewing, then hand tighten
the knob on the mounting bracket. Remove
the dust cover.
Match the connector’s Color to the socket
Color.
8
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2 Basic Operation
Overview of the keys
Go back to an earlier menu or display. Any changes made are
ignored. In chart mode, centres chart at boat’s position.
Show a menu of the main displays. To go to a display, select it
from the menu (see section 2-8).
Cursor keys, to move the cursor or the selection highlight.
Show a menu of the options for the current display. Press
again to display the Setup menu (see section 17).
Start an action or accept a change.
Zoom in or out to display different areas and detail on the
chart.
Man overboard (MOB, see section 2-5).
Turn Explorer 538/538i on and off (see section 2-3); adjust the
backlighting (see section 2-4).
2-1 Using the keys
In this manual:
Press means to push the key for less than a second.
Hold means to hold the key down.
The internal beeper beeps when a key is pressed (to disable or enable the beep, see section 14-1).
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2-2 Using the menus
Operate the Explorer 538/538i by selecting items
from menus. Items can be submenus, commands
or data.
Selecting a submenu
A
after a menu item indicates a submenu, for
example Chart . Press
or
to move the
.
c) To change a name or number:
highlight to the submenu, then press
1
Press
to display the name or number:
Starting a command
Press
or
to move the highlight to the
command, for example Goto cursor, then press
.
2
Press
or
to select a letter or digit to
change. Press
digit.
or
to change the letter or
Changing data
First press
or
to move the highlight to the
Repeat this to change other letters or
numbers.
data to change, then:
a) To change a tick box
means On or Yes
3
Press
to accept the new value. Or press
to ignore the changes.
means Off or No.
d) To change a slider value
Press
or
to change the tick box.
Press to decrease the value or
to increase
b) To select an option
the value.
1
2
Press
Press
to display the menu of options.
to move the highlight to the
or
option you want, then press
.
2-3 Turning on and off / auto power
Auto power
Turning on manually
If the Explorer 538/538i is wired for auto power
(see section 15-4), then:
If the Explorer 538/538i is not wired for auto
power, press
to turn the unit on. If necessary,
adjust the display to be easy to read (see section
2-4).
The Explorer 538/538i automatically turns on
when you turn the boat’s ignition switch on.
Note: If the Explorer 538/538i is not wired for
auto power then the Explorer 538/538i does not
record engine hours and might not record fuel
consumption (see section 15-4).
You can not turn the Explorer 538/538i off
while the ignition switch is on.
If Auto power off (see section 14-1) is
, the Explorer 538/538i automatically turns
off when you turn the boat’s ignition switch
off.
Turning off manually
If the Explorer 538/538i is not wired for auto
power or if the ignition switch is off, hold down
until the display turns off.
If Auto power off (see section 14-1)
is , the Explorer 538/538i stays on when
you turn the boat’s ignition switch off. You
can now turn the Explorer 538/538i off
manually.
10
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2-4 Backlight and night mode
To go to the Backlight display, press
When you have finished, press
briefly.
Night mode
.
Night mode sets the palette for all displays.
Normal palette, for daytime
A palette optimised for night time.
Backlight
The display and keys are backlit. To change the
backlight level, select Backlight, then press
To change mode, select Night mode, then press
. To change only the chart palette, see section
17-2.
to dim or
to brighten.
Tip: Press
twice to give the brightest
screen, with maximum backlight and Night mode
off.
2-5 Man overboard (MOB)
The MOB feature saves the boat’s position and
then navigates back to this point.
If the NMEA output (autopilot) is on, the
Explorer asks if the autopilot is active. Select:
No:Use the Explorer 538/538i to manually
navigate to the destination MOB waypoint
(see sections 3-1-1 and 3-1-2).
MOB will not work if the Explorer 538/538i
does not have a GPS fix.
Yes:The Explorer 538/538i asks if the boat is to
go to the MOB waypoint.
1
2
Press
.
Select:
The Explorer 538/538i stores the boat’s
position as a waypoint called MOB.
Yes:to immediately start navigating to the
MOB waypoint.
The Explorer 538/538i changes to the chart
display, with the MOB waypoint at the centre
of the chart.
This might result in a sudden and dangerous
turn.
The chart zooms in for accurate navigation.
If the chart can not show the required
small scale, the Explorer 538/538i changes
to plotter mode (a white display with
crosshatching and no chart details, see
section 14-2).
No:disengage the autopilot; then use the
Explorer 538/538i to manually navigate to the
destination MOB waypoint (see sections 3-1-1
and 3-1-2).
To cancel MOB or set another MOB
3
The Explorer 538/538i sets the MOB waypoint
to be the destination to navigate to.
1
2
Press
again to display a menu.
If the NMEA output (autopilot) is off (see
section 14-9) use the Explorer 538/538i to
manually navigate to the destination MOB
waypoint (see sections 3-1-1 and 3-1-2).
Select an option from the menu.
Tip: The MOB waypoint remains on the chart after the MOB has been cancelled. To delete the MOB
waypoint, see section 5-2-5.
2-6 Alarms
When the Explorer 538/538i detects an alarm
condition, it displays a warning message on
the display, the internal beeper sounds and any
external beepers or lights operate.
Press
to clear the alarm. The alarm will
sound again if the alarm condition occurs again.
The Explorer 538/538i has user settable alarms
plus an alarm for loss of GPS fix (see section 14-7).
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2-7 Simulate mode
To start and stop Simulate mode, and for more
information, see section 14-12. In simulate mode,
Simulateor Demoflashes at the bottom of
the display.
In Simulate mode, the Explorer 538/538i ignores
data from the GPS antenna and other transducers
and sensors and the Explorer 538/538i generates
this data itself. Otherwise, the Explorer 538/538i
functions normally.
There are two simulate modes:
Never have Simulate mode on when the
Explorer 538/538i is navigating on the water.
Normal:Allows a user to become familiar
with the Explorer 538/538i off the water.
Demo:Simulates a boat moving along
a route and automatically displays different
Explorer 538/538i functions.
2-8 The main displays
To go to a display, press
to select the type of display to show, press
to select the display from the list, then press
.
, press
or
The available displays depend on the optional
sensors and instruments that are installed (see
section 1-1).
or
Chart menu and displays
SmartCraft menu and displays
The SmartCraft displays require a SmartCraft
system to be installed. For information on
using SmartCraft, see the SmartCraft Gateway
Installation and Operation Manual.
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Other menu and displays
Note: Press
to go from an Other display
back to your last chart display.
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2-8-1 Dual displays
If Chart is the active display: press
display the options for Chart; press
twice to make Gauges the active display.
to
The Explorer 538/538i can show two displays at
once, for example Chart + Gauges. One of the
displays, called the active display, has a yellow
border and is controlled by the user. To change
the active display, press
cannot be the active display). For example:
If Gauges is the active display: press
wto display the options for Gauges; press
twice (Highway
twice to make Chart the active display.
Chart display is
active
Chart display is
not active
Yellow border
Press
Press
Yellow border
Gauges display
is not active
Gauges display is
active
2-8-2 Data header
3
4
To choose the size of the numbers:
The chart and highway displays can show data at
the top of the display.
i
Select Size.
ii Select Small, Medium or Large.
To change the data displayed:
i
Select Data setup.
ii Change a data field:
a
b
c
Press the cursor keys to highlight the
field.
The data header for each display can be different.
To change the data header for a display:
Press
to display a menu of data
1
Go to the display, press
and select
items.
Data header.
To turn the data header off or on:
Select a data item that is available on your
system or select None to leave the field
empty.
2
i
Select Data.
ii Select or
.
iii Repeat the above step to set the other
data fields. Press
.
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Tip: If less than the maximum number of lines of data are used, the data will take up less of the
display area.
Press
5
to return to the display.
2-8-3 Compass
The chart and highway displays can show a
compass at the top of the display.
To turn the compass off or on:
1
2
Press
and select Data header.
The compass always shows the boat’s course over
ground (COG), a red symbol in the middle. When
the boat is navigating to a point, the compass
also shows bearing to the destination (BRG), a
black symbol.
Set Compass to or
.
In this example, BRG is [300]° and COG is [320]°.
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3 Navigation: Chart
The chart display shows the chart, the boat’s position course and navigation data.
3-1 Overview of navigating
The Explorer 538/538i has two ways of navigating, going straight to a point or following a route.
3-1-1 Navigating to a point
B
D
When the Explorer 538/538i is navigating to
a point, the chart and highway displays show
navigation data:
C
A
B
The boat position
.
The destination point marked with a circle.
The boat’s plotted course to the destination.
A
D
C
D
Two CDI lines, parallel to the boat’s plotted
course, which indicate the maximum
expected deviation from the plotted course.
Note:
For more information, see appendix C.
1
If the XTE alarm is enabled, an alarm will
sound if the boat deviates too much from its
intended course (see section 14-7).
If the Explorer 538/538i is connected to an
autopilot, the Explorer 538/538i will send data to
the autopilot to steer the boat to the destination.
Start the autopilot before starting to navigate to
the point.
2
If the arrival radius alarm is enabled, then an
alarm will sound to show that the boat has
reached the destination (see section 14-7).
If the Explorer 538/538i has no autopilot, steer the
boat manually:
a
b
c
use the boat position and destination on
the chart or highway displays
or use navigation data displayed on the
data header (see section 2-8-2)
or use COG and BRG on the compass (see
section 2-8-3).
3-1-2 Going to a waypoint or to a point on the chart
A waypoint is a position that you can set on the
Explorer 538/538i chart, for example a fishing
spot or a point on a route (see section 5).
Going to a waypoint from the waypoints
display
1
Go to the waypoints display.
Going to a waypoint from the chart display
2
Press
go to.
or
to highlight the waypoint to
1
2
Go to the chart display.
Move the cursor to the waypoint: either use
the cursor keys or use Find (see section 3-2-5).
3
Press
and select Goto.
3
Press
and select Goto.
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Going to a point on the chart
Navigating
1
2
Switch to a chart display.
The Explorer 538/538i navigates to the point as
described in section 3-1-1.
Move the cursor to the destination point:
either use the cursor keys or use Find (see
section 3-2-5).
Cancelling navigating
Go to a Chart display, press
and select
3
Press
and select Goto cursor.
Cancel goto.
Tip: Before starting, create waypoints at points
of interest. Create a waypoint at the start of the
trip for you to navigate back to (see section 5-2-1).
Make sure the course does not pass over land
or dangerous waters.
3-1-3 Following a route
Preparing
4
The Explorer 538/538i displays a chart with
the route marked and starts navigating from
the start of the route.
A route is a list of waypoints that the boat can
follow (see section 6).
Navigating
To create waypoints before creating the
route, see section 5-2-1.
The Explorer 538/538i navigates to each waypoint
on the route in turn as described in section 3-1-1.
To create a route, see section 6-2-1.
The Explorer 538/538i stops navigating to the
waypoint at the end of the current leg and starts
the next leg of the route:
Starting a route from the chart display:
1
Go to the chart display.
2. Press
3. Press
and select Start Route.
to highlight the route to
.
a
when the boat comes within 0.025 nm of the
waypoint
or
follow. Press
b
c
or when the boat passes the waypoint
or if you skip the waypoint.
4. The Explorer 538/538i asks for the direction to
traverse the route.
Skipping a waypoint
Select Forward(the order the route was
To skip a waypoint, go to a chart display, press
and select Skip. The Explorer 538/538i
starts navigating straight towards the next
waypoint on the route.
created) or Reverse.
5. The Explorer 538/538i displays the chart with
the route marked and starts navigating from
the start of the route.
Starting a route from the routes display:
1
2
Go to the routes display.
Skipping a waypoint with the autopilot on
might result in a sudden course change.
Press
or
to highlight the route to
follow. Press
and select Start.
Cancelling a route
3
The Explorer 538/538i asks for the direction to
traverse the route.
When the boat has reached the final waypoint,
or to stop the boat following the route at any
time, cancel the route. Go to a chart display, press
and select Cancel route.
Select Forward(the order the route was
created) or Reverse.
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3-2 Chart display
To go to the Chart display, press
A typical chart display shows:
, select Chart, then select Chart.
A
B
C
D
K
J
E
F
I
H
G
A
B
C
D
E
Data header. To turn the data off or on or to change what data is displayed, see section 2-8-2
Compass (see section 2-8-3)
Chart scale (see section 3-2-3)
Boat position (see section 3-2-1)
Boat track (see section 3-5)
F
Boat course and CDI lines (see Appendix C, CDI). The boat is going to the waypoint called FISH06
G
H
I
Distance and bearing of cursor from boat
Land
Sea
J
The cursor (see section 3-2-1)
A typical waypoint (see section 5)
K
Note: To change the types of information displayed on the chart, see section 17-2.
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3-2-1 Chart modes
The Chart has two modes:
Press midway between two of the cursor keys
to make the cursor move diagonally.
Centre on boat mode
Hold a cursor key down to make the cursor
move continuously across the display.
To switch to centre on boat mode in the chart
display, press
. The boat is at the centre of
the chart. As the boat moves through the water,
the chart automatically scrolls to keep the boat
in the centre of the chart. The cursor (see below)
is turned off.
In Cursor mode:
The distance ( DST) and bearing ( BRG) of
the cursor from the boat are displayed at the
bottom, left corner of the display.
Cursor mode
The chart does not scroll as the boat moves.
The keys
and
are called cursor keys.
If the cursor reaches the edge of the display,
the chart will scroll.
To switch to cursor mode in the chart display,
hold down a cursor key. The cursor
and moves away from the boat:
appears
For example, hold down
to move the
cursor to the right side of the display and the
chart will scroll to the left.
Press the key which points in the direction
that the cursor will move, for example press
to move the cursor down.
3-2-2 Latitude and longitude
If the cursor has been moved in the last ten
seconds, then the position is the cursor’s position,
and the latitude and longitude has a cursor
symbol to show this:
Latitude and longitude can be displayed in
the data header. The display is degrees and
minutes to three decimal places, about 2 m (6
ft) resolution. Normally the position is the boat’s
position, and the latitude and longitude has a
boat symbol to show this:
36° 29.841’ N or S
Latitude
175° 09.012’ E or W Longitude
36° 29.637’ N or S
Latitude
175° 09.165’ E or W Longitude
When reading the boat position, make sure
the position is not the cursor position.
3-2-3 Chart scale
The chart scale is displayed at the top left of the
chart:
Press
to zoom in and display a smaller area of
the chart in more detail. Press
to zoom out
and display a bigger area in less detail.
To see stored information about a point on the
chart (for example, a chart symbol):
3-2-4 Chart symbols and information
The chart will show symbols, such as waypoints
and chart symbols (for example buoys, beacons,
wrecks and marinas). When the cursor is placed
over a symbol for at least two seconds, a data
window appears at the bottom left of the display
with information about the symbol.
1
2
3
Move the cursor to that point on the chart.
Press and select Chart info.
A menu of objects is displayed:
Select an object to display.
i
ii Press
other objects.
iii Finally, press
to return to the menu. Select
to return to the chart.
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3-2-5 Finding places
To see places near the boat’s position, press
5
6
Select the place and press
display changes to show the selected place in
the middle of the display.
. The chart
to switch to centre on boat mode.
To see places near a different point, move the
cursor to that point on the chart.
To see stored information about the selected
place, press
and select Chart
To find and display places of interest:
info(see section 3-2-4). To display a tide
chart for a selected tide station, select Tide
height from the chart info.
1
2
Press
and select Find.
Select the type of place: Waypoints, Routes,
Ports, Port services or Tide stations.
3
4
For a Port service, select the type of service to
find.
A list of places is displayed. If there are more
places than will fit on the display, press
or
to scroll up or down a page at a time.
3-3 Distance and bearing calculator
The distance and bearing calculator can plot
a course of one or several legs and show the
bearing and length of each leg, as well as the
total distance along the course. The completed
course can be converted into a route.
4
5
6
To remove the last leg from the course, press
and select Remove.
Repeat the above two steps to enter the
whole course.
To save the new course as a route, press
and select Save.This also saves any
new points on the course as new waypoints,
with default names. If necessary, edit the
route later (see section 6-2-2) and edit any
new waypoints later (see section 5-2-3).
To use the distance and bearing calculator:
1
2
3
Press
displayed. Press
Distance.
Move the cursor to the start of the first leg. It
does not matter if this point is a waypoint or
until the chart display is
and select
7
Finally, press
display.
to return to the chart
not. Press
.
To add a leg to the course, move the cursor
to the end of the leg. It does not matter if this
point is a waypoint or not. The display shows
the bearing and length of the leg, as well
as the total distance along the course. Press
.
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3-4 Projected course
If Projected course is turned on, then the Explorer
538/538i will display the projected position based
on the course over ground (COG), speed and a
specified time. To turn Projected course on and
off and to set the time, see section 14-2.
A
B
A
B
C
Projected position
Boat’s projected course
Boat position
C
3-5 Tracks and tracking
Tracking records the boat’s position to memory at
regular intervals, which can be:
a track depends on the selected track interval: a
small interval will give a shorter, more detailed
track and a long interval will give a longer, less
detailed track, as shown in these examples:
Time intervals.
Or distance intervals.
The track of where the boat has been can be
displayed on the chart. The Explorer 538/538i can
display one track while recording another.
Time intervals
Interval
Track 1
Track 2, 3, 4
or 5
To work with tracks, see section 14-5.
The Explorer 538/538i can store five tracks:
1 sec
33 minutes
5.5 hours
33 hours
8 minutes
1.4 hours
8 hours
Track 1 can hold up to 2000 points and is
intended to record the normal progress of
the boat.
10 sec
1 min
Tracks 2, 3, 4 and 5 can hold up to 500 points
each and are intended to record sections to
be retraced accurately, for example entering a
river mouth.
Distance intervals
Interval
Track 1
Track 2, 3, 4
or 5
Tip: Record the tracks in good conditions.
0.01
1
20
5
When recording is on and the track becomes full
then recording continues and the oldest points
in the track are deleted. The maximum length of
2,000
20,000
500
5,000
10
The track lengths are in the current distance units,
for example nm.
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4 Navigation: Highway display
The highway display has a bird’s eye view of the boat’s
course to a destination. To go to the Highway display,
press
, select Other,then select Highway.
The highway display shows:
A
B
A
B
C
D
E
Optional data header (see section 2-8-3)
Optional compass (see section 2-8-4)
Destination waypoint
C
Boat’s plotted course to destination
CDI lines, parallel to the boat’s plotted course (see
Appendix C, CDI). The CDI lines are like a highway
over the water where the boat will move.
D
E
F
CDI scale
G
The boat position is at the bottom, centre of the
display.
G
F
The highway display does not show land,
dangerous waters or chart symbols.
5 Navigation: Waypoints
A waypoint is a position that you can set on the
Explorer 538/538i chart for example a fishing spot
or a point on a route. The Explorer 538/538i can
have up to 3000 waypoints. A waypoint can be
created, changed or deleted. A waypoint has:
A type:
Normal: A normal waypoint can be
navigated to or included in a route.
Danger:A danger waypoint is a point to
avoid. If the boat comes within the danger
radius of a danger waypoint the unit can
sound an alarm (see section 14-7).
A name (up to eight characters).
An icon showing what kind of waypoint it is.
The available icons are:
A display option:
Controls how the waypoint is displayed
when the Waypointssetup option is set to
Selected(see section 14-2):
Off:The waypoint is not displayed.
Icon: The waypoint icon is displayed.
I+N (Icon and Name): The waypoint
icon and name are displayed.
If there are many waypoints, use this feature
to select which waypoints are displayed on
the chart.
Note: The other choices for Waypoints are Hide
all and Show all (see section 14-2).
A position.
A color for the waypoint symbol and name
on the chart.
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5-1 Waypoints display
To go to the waypoints display, press
, select Other, then select Waypoints.
The waypoints display is a list of the waypoints
that have been entered, each with waypoint
symbol, name, latitude and longitude, distance
and bearing from the boat, type and display
option.
If there are more waypoints than will fit on the
display, press
or
to scroll up or down a
page at a time.
5-2 Managing waypoints
5-2-1 Creating a new waypoint
Creating and editing a new waypoint from
Creating a new waypoint from the
waypoints display
the chart display
1
2
3
In the waypoints display, press
and
select Create.
A new waypoint, with a default name and
data, is created at the boat position.
1
To create a waypoint at the boat position,
press ESC to switch the chart to centre on
boat mode.
Or, to create a waypoint at a different point,
move the cursor to that point on the chart.
Change the waypoint data if necessary (see
section 5-2-7). Select Save.
2
3
Press
.
Note: Waypoints can also be created when a
route is created (see section 6-2-1).
A new waypoint, with the default name and
data is created.
4
Change the waypoint data if necessary (see
section 5-2-7). Select Save.
Do not create a navigation waypoint on land
or in dangerous water.
5-2-2 Moving a waypoint
Moving a waypoint from the chart display
Moving a waypoint from the waypoints
display
1
In the chart display, move the cursor to the
waypoint to move.
To move a waypoint from the waypoints display,
edit the waypoint (see section 5-2-3) and change
the latitude and longitude.
2
3
Press
Move the cursor to the new position and
press
and select Move.
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5-2-3 Editing a waypoint
Editing a waypoint from the chart display
Editing a waypoint from the waypoints
display
1
In the chart display, move the cursor to the
waypoint to edit.
1
In the waypoints display, press
or
to
highlight the waypoint to edit. Press
and select Edit.
Change the waypoint data (see section
5-2-7). Select Save.
2
3
Press
and select Edit.
Change the waypoint data (see section 5-2-7).
Select Save.
2
5-2-4 Displaying a waypoint on the chart
This goes to the chart display, and shows the
Or, in the Chart display, press
, select
selected waypoint at the centre of the display.
Find,then select Waypoints.Select a
waypoint from the list.
1
In the waypoints display, press
or
2
The Explorer 538/538i switches to the chart
display, with the selected waypoint at the
centre of the chart.
to highlight the waypoint to display. Press
and select Display.
5-2-5 Deleting a waypoint
Deleting a waypoint from the chart display
A waypoint can not be deleted if the boat is
navigating to it or if the waypoint is used in more
than one route. A waypoint that is used in one
route can be deleted.
1
In the chart display, move the cursor to the
waypoint to delete.
2
3
Press
and select Delete.
Select Yesto confirm.
Deleting a waypoint from the waypoints
display
When a waypoint is deleted from a route,
check that the changed route does not cross
land or dangerous waters.
1
In the waypoints display, press
to highlight the waypoint to delete. Press
and select Delete.
Select Yesto confirm.
or
2
5-2-6 Deleting all waypoints
1
In the waypoints display and press
and select Delete all.
2
Select Yes to confirm.
5-2-7 Changing a waypoint’s data
To change the waypoint data when it is displayed
in a window:
2
3
If necessary, repeat the above step to
change other data.
1
Select the data to change.
Press
Use the cursor keys to change the data.
Press
Select Save.
.
.
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5-2-8 Sort Waypoints
To change how the waypoints list is displayed:
Icon:Grouped by icon type.
Distance:In order of distance from the
1
2
Press
and select Sort by.
boat.
Select how to display the list:
An arrow at at the top of a column indicates how
the waypoints are sorted.
Name:In alphabetical order by name.
5-2-9 Navigating to a waypoint
See section 3-1-2.
6 Navigation: Routes
A route is a list of waypoints that the boat can
navigate along. Routes can be created, changed
and deleted.
The Explorer 538/538i can navigate along a route
in either direction. Waypoints on the route can
be skipped.
The Explorer 538/538i can have up to 25 routes.
Each route can have up to 50 waypoints.
A route can:
Start and stop at the same waypoint .
Include waypoints more than once.
Make sure that routes do not cross land or
dangerous water.
6-1 Routes display
The routes display is a list of the routes that
have been entered, each with route name, start
waypoint, end waypoint, number of legs and
total distance.
To go to the routes display, press
Other, then select Routes.
If there are more routes than will fit on the display,
, select
press
or
to scroll up or down a page at
a time.
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6-2 Managing routes
2
To insert a waypoint in the route by breaking
one leg into two:
i
Move the cursor to the leg you want to
break.
After creating or changing a route, display
the route on the chart and check that it does
not cross land or dangerous water.
ii Press
and select Insert.
iii Move the cursor to where the new route
waypoint will be.
6-2-1 Creating a new route
A. Creating a new route from the chart
iv Press
.
display while creating the route:
3
4
To move a waypoint in the route:
Press
or
to change the range; scroll
i
Move the cursor to the waypoint to
move.
the chart by moving the cursor to the edge of
the chart.
ii Press
and select Move.
A data box at the bottom left of the display
shows the route name and total distance. If
the cursor is near a leg, it shows the length
and bearing of the leg as well.
iii Move the cursor to where the waypoint
will be.
iv Press
.
The legs of a route must start and end at
waypoints. If a leg does not start or end at an
existing waypoint then a new waypoint will
be created automatically (to change the new
waypoint data, see section 5-2-7).
To remove a waypoint from the route:
i
Move the cursor to the waypoint to
remove from the route.
ii Press
and select Remove. The
waypoint is removed from the route, but
the waypoint is not deleted.
You can not use a Danger waypoint in a route.
1
2
In the chart display, press
and select
5
6
7
To start navigating the route
New route.
The route is given a default name:
i
Press
To end creating the route
Press
and select End
To delete the route
Press
and select Start
i
Change the name if necessary.
i
ii Select Ok.
To enter the legs of the route:
3
i
and select Delete
i
Move the cursor to the start of the route
and press
ii Select yes to confirm.
.
Tip: The distance and bearing calculator can
also be used to enter a course and save it as a
route (see section 3-3).
ii A waypoint is created with a default
name. to save this waypoint press enter,
to edit the waypoint refer to 5-2-7
B. Creating a new route from the routes
display
iii Press
a dotted leg line is displayed
from the cursor to the previous waypoint
1
2
3
In the routes display, press
and select
iv Move the cursor to the end of the first leg
Create.
A new route, with a default name and no
waypoints, is displayed.
and press
.
v
Repeat i to iv until the last waypoint in
the route is placed and saved
To change the route name:
vi Press to complete the route
Menu options while creating a route:
i
Select the route name at the top of the
display and press
ii Change the name if necessary.
iii Press
.
1
To add a waypoint to the route
Press
and select Add.
i
.
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4
To insert a waypoint in the route:
automatically. If the route has more
waypoints than will fit on the display,
i
Select where the waypoint will be:
press
To remove a waypoint from the route:
Select the waypoint to remove.
ii Press
and select Remove.
Repeat this process until the route is finished.
Press
or
to see them.
To insert the first waypoint in a new
route, select Leg 1.
5
i
To insert a waypoint at the end of the
route, select the unused leg at the
end of the list of waypoints.
6
7
8
Otherwise, select the waypoint to
insert the new waypoint in front of.
.
Display the route on the chart (see section
6-2-3) and check that the route does not cross
land or dangerous water.
ii Press
. A list of waypoints is
displayed. Select the waypoint to use.
As waypoints are inserted, the distance
and bearing of each leg is shown
See section 3-1-3.
6-2-2 Editing a route
Editing a route from the chart
Editing a route from the routes display
1
In the routes display, select the route to
1
In the routes display, press
or
to
edit. Press
chart.
and select Edit on
highlight the route to edit. Press
and
select Edit.
The selected route is displayed: the route
name and a list of the waypoints.
2
3
The selected route is displayed on the chart,
with a circle around the first waypoint.
2
3
Edit the route as described in section 6-2-1 A,
starting at step 4.
Edit the route as described in section 6-2-1 B,
starting at step 3.
6-2-3 Displaying a route on the chart
To view the selected route at the centre of
the display:
Or, in the Chart display, press
, select
Find,then select Route.Select a route
from the list.
1
In the routes display, press
or
to
2
The Explorer 538/538i displays the selected
route on the chart.
highlight the route to display. Press
and select Display.
6-2-4 Deleting a route
1
In the routes display, press
or
to highlight the route to delete. Press
and select
Delete.
Select Yesto confirm.
2
6-2-5 Deleting all routes
1
In the routes display, press
and select Delete all.
2
Select Yesto confirm.
6-2-6 Navigating a route
See section 3-1-3.
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7 Satellites
WAAS covers all of the USA and most of
Canada. EGNOS will cover most of Western
Europe when it becomes operational.
GPS worldwide navigation
The US Government operates the GPS system.
Twenty-four satellites orbit the earth and
broadcast position and time signals. The
positions of these satellites are constantly
changing. The GPS receiver analyses the signals
from the closest satellites and calculates exactly
where it is on earth. This is called the GPS
position.
Differential beacon DGPS
Differential beacons are land based radio
transmitters that broadcast correction
signals that can be received by a special
receiver on the boat. Differential beacons
are usually only installed near ports and
important waterways, and each beacon
has a limited range. The accuracy of the
corrected GPS position is typically better
than 2 to 5 m (6 to 16 ft).
The accuracy of the GPS position is typically
better than 10 m (33 ft) for 95% of the time. A
GPS antenna can receive signals from the GPS
satellites when it is almost anywhere on earth.
GPS receiver
DGPS
Northstar GPS units have a sensitive 12-channel
receiver, which tracks signals from all GPS
satellites visible above the horizon and uses
measurements from all satellites more than 5°
above the horizon to calculate the position.
A DGPS system uses correction signals to
remove some of the errors in the GPS position.
The Explorer 538/538i can use one of two types
of DGPS system:
WAAS and EGNOS DGPS
Each time a GPS receiver is turned on, it normally
takes about 50 seconds before it outputs the
first position. Under some circumstances it will
take up to two minutes or longer.
WAAS and EGNOS are two satellite based
DGPS systems. The correction signals are
broadcast by satellites and are received by
the Explorer’s standard GPS antenna. The
accuracy of the corrected GPS position is
typically better than 5 m (15 ft) for 95% of
the time.
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7-1 Satellite display
A
B
Status of GPS antenna, for example Acquiring,
GPS fix, No GPS. If the unit is in Simulate
mode it displays Simulate (see section 2-7)
The satellite display has information about the
GPS satellites and GPS position.
To go to the satellite display, press
, select
Time and date from GPS satellites. Time is
local time (UTC [GMT] plus local offset, see
section 14-11)
Other, then select Satellite.
The satellite display shows:
C
D
HDOP: The error in the GPS position caused
by satellite geometry. A low value indicates a
more precise fix, a high value a less precise fix
A
Signal strengths of up to twelve visible GPS
satellites. The higher the bar the stronger the
signal
B
C
F
E
F
Boat position
G
Positions of visible GPS satellites:
Outer circle is horizon
Inner circle is 45° elevation
Centre is directly above
North is at top of display
D
E
G
If the boat is moving, COG is a line from
centre
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8 Gauges display
The Gauges display shows boat data, such as
water speed, as analog or digital gauges.
Changing the Gauges display
1
Go to the Gauges display and press
.
To go to the Gauge display, press
select Chart, then select Chart+Gauges.
If necessary, press twice to switch to the
and
2
To select the gauge type.
i
Select Gauge type.
ii Select Analog (round) or Digital
Gauges display (see section 2-8-1).
(numbers).
Before using the Gauge display, set Speed
3
4
To select the gauge size.
range and Max fuel flow (see section
i
Select Gauge size.
17-11).
Chart
ii Select Small, Medium or Large.
To change the data displayed:
i
Select Gauge setup.
ii Change a gauge:
a) Press the cursor keys to highlight the
gauge.
b) Press
items.
to display a menu of data
c) Select a data item that is available on
your system.
iii Repeat the above step to set the other
gauges. Press
.
5
Press to return to the Gauges display.
Gauges
30
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9 Data display
The data display has large numeric data fields.
To go to the data display, press
, select
Other,then select Data.
To select what data is displayed:
1
2
Press
and select Data setup.
Change a data field:
i
Press the cursor keys to highlight the
field.
ii Press
items.
to display a menu of data
iii Select a data item that is available on your
system or select None to leave the field
empty.
3
4
Repeat the above step to set the other data
fields.
Press
.
10 Fuel functions and display
The Fuel functions require optional fuel sensors to be installed.
10-1 When you add or remove fuel
When you add or remove fuel in a boat with no
SmartCraft fuel tank level sensors, you must tell
the Explorer, otherwise REMAINING, RANGE
and the low fuel alarm will be meaningless.
Mostly use procedure B below when adding
fuel, but completely fill the tank and follow
procedure A about every tenth time you add
fuel.
A
1
When you completely fill the tank
B
When you part fill the tank
Fill the tank.
1
Before adding fuel, go to the fuel display and
write down the value of Remaining, which is
the amount of fuel now in the tank.
2
Press
one or more times until the
Setupmenu is displayed, then select
Fuel.
2
3
Add fuel to the tank, writing down how much
you add.
3
Select Tank full.
Add together the two figures you have
written down, to calculate the amount of fuel
now in the tank.
Note: Underfloor fuel tanks are often difficult to
refill to the same level twice, due to air pockets.
With underfloor fuel tanks:
4
Press
one or more times until the
Trim the boat to the same angle in the water
each time you follow procedure A.
Setup menu is displayed, then select Fuel.
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31
5
Set Remaining to the amount of fuel that
C
When you remove fuel
you calculated was now in the tank.
Repeat procedure B, but subtract the fuel you
have removed from the original amount of fuel
in the tank to calculate the amount of fuel now
in the tank.
Note: If you follow procedure B every time you
add fuel, then a small error will accumulate,
because it is hard to measure exactly how much
fuel you add. To avoid this, completely fill the tank
and follow procedure A about every tenth time
you add fuel.
10-2 Fuel display
Fuel display without engine RPM
To go to the Fuel display, press
, select
Other,then select Fuel.The display is
different if engine RPM is available (requires
SmartCraft to be installed):
The Fuel display shows
Used
The total fuel used since this was last reset with
the Clear Used command.
Remaining
The amount of fuel remaining in the tank.
Flow
The fuel consumption per hour. For twin engine
installations, the fuel flow for each engine is
shown separately. This is useful for checking that
both engines are under the same load.
Speed
If the Explorer 538/538i has both GPS and
paddlewheel speed available then you can select
which to use. The choice affects the calculated
Range and Economy (see section 17-5 Speed
source).
Fuel display with engine RPM
If the Explorer 538/538i uses a paddlewheel
sensor to measure speed, then the speed must
be accurately calibrated.
Economy
The the distance travelled per unit of fuel used.
The bigger this number, the better the fuel
economy. Adjust the throttle and trim to achieve
the best economy.
Range
The estimated boat range at the current fuel flow.
32
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10-3 Fuel consumption curves
A fuel consumption curve is a powerful tool for assessing your boat performance in different conditions
and for helping you to run at the most economical speed for the conditions. Fuel consumption curves
require engine RPM, which requires SmartCraft to be installed.
10-3-1 Making a fuel consumption curve
Making a fuel consumption curve requires
running the boat in a straight line through the
engine’s full RPM range for about 15 minutes.
6
The Explorer 538/538i then asks you to set
the throttle to achieve a target RPM. For a
twin engine boat set both engines to about
the target RPM. When the engine RPMs are
correct, the Target RPM box will turn green.
For your first curve, choose a calm day with light
wind and little current; have a typical load and
a freshly cleaned hull. Then you can make fuel
consumption curves for different boat, weather
or sea conditions. Compare these with your
first curve to see how your boat’s performance
changes with conditions.
Making a curve
1
2
Start running the boat in a straight line.
Press one or more times until the
Setup menu is displayed, then select Fuel.
3
Select Fuel consumption curve,
then select New.
Now, do not change the engine speed. Wait
for about 60 seconds for the boat to stabilise,
ensuring the Target RPM box stays green.
Then press
. Wait while the Explorer
538/538i records the data.
4
5
Enter the comfortable maximum RPM you
have measured for the engine. Do not use the
maker’s maximum RPM.
7
The Explorer 538/538i repeats the above step
to record data up to the maximum RPM.
Then the Explorer 538/538i asks if you want
to save the curve. Select Yes. The Explorer
538/538i asks for a name for the curve.
Change the default name if required, then
The Explorer 538/538i then asks you to set the
minimum RPM. Set the throttle for minimum
RPM; for a twin engine boat set both engines
to about the same minimum RPM.
press
Note: To interrupt making the curve at any time,
press
. The new curve is stored.
Now, do not change the engine speed. Wait
for about 60 seconds for the boat to stabilise,
.
then press
. Wait while the Explorer
538/538i records the data.
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33
10-3-2 Managing fuel consumption curves
Record several curves for different conditions.
Deleting a curve
Renaming a curve
1
Press
once or more until the Setup
menu is displayed, then select Fuel.
1
Press
one or more times until the
Setup menu is displayed, then select Fuel.
2
Select Fuel consumption curve. Select
Name,press
and select the name of
2
Select Fuel consumption curve.
the curve to delete.
Select Name, press
and select the
name of the curve to rename.
3
Select Deleteand press
.
3
Select Renameand press
. Change the
name and press
.
10-3-3 Using fuel consumption curves
A fuel consumption curve is displayed on the fuel
display:
F
D
a
For a twin engine boat, keep the RPM of both
engines similar while using a curve.
E
B
Displaying a curve
1
To go to the Fuel display, press
, select
Other,then select Fuel.
C
A
2
Press
, press
and select the
name of the curve to display on the fuel
display.
C
Red marker: the boat speed now. This marker
is below the red curve, showing that the boat
speed now at this RPM is less than when you
recorded the curve.
Using a curve
Compare your boat’s performance now, at the
current RPMs, with the boat’s performance when
you made the curve. You can compare your
boat’s performance now with a curve made
under ideal conditions or with a curve made
under similar conditions.
D
E
Blue curve: fuel consumption at different
RPMs recorded when you made this fuel
consumption curve.
Blue marker: the fuel consumption now. This
marker is below the blue curve, showing that
the fuel usage now at this RPM is better than
when you recorded the curve.
Information in a curve
A
RPM of the boat now. For a twin engine boat,
the RPM is the average of the two RPMs.
F
If the blue curve has a dip, then running the
boat at this RPM will give the best speed for
the least fuel consumption.
B
Red curve: boat speeds at different
RPMs recorded when you made this fuel
consumption curve.
34
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11 Tides display
The tides display is available on C-MAP charts.
The tides display shows tide information at a tide
station for the selected date.
3
A list of tide stations are displayed. Select the
tide station to display. The chart redraws with
the tide station centred.
Note: The tides display requires the local
time offset to be set to work correctly (see
section 14-11)
4
5
Press
and select Chart info.
Select Tide height.
Choosing the date of the tide chart
To show the tides display for the tide station
1
2
Press
.
nearest to the boat, press
then select Tides.
To go to the tides display for any tide station:
, select Other,
Select Today, Next day or Prev day.
To choose a different date from these, select
Set date,edit the date, press
.
1
2
From the chart display, press
and
select Find.
Select Tide stations.
The tides display shows data for the chosen date
A
Tide station name and distance from
boat
A
N
B
Current time and chosen date for
display
B
C
D
E
Tide chart
Night
D
Dawn
D
F
E
F
Day
G
C
G
H
I
Dusk
Tide height
L
Time cursor, a vertical dotted line.
Press
H
M
or
to move cursor
sideways
I
J
J
Time of cursor and tide height at that
time
K
K
L
Data for the chosen date
Tide height cursor, a horizontal
dotted line. Press
or
to move
cursor up and down.
M
N
Height of cursor on the tide chart
Moon phase for moon at the current
time on the chosen date
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12 User card display
A C-MAP™ user card is an optional plug-in card
that can store data files (see section 1-4). There
are three types of files: waypoints, routes or a
track.
To go to the user card display, press
Other, then select User card.
, select
Note:
1
Before using a user card, remove any
chart card and plug the user card in.
When you have finished with the user
card, remove the user card and replace
the chart card (see section 1-3).
2
The older 5 volt cards are not supported.
The user card display has:
File list
A list of the files on any user card in the Explorer
538/538i. If there are more files than will fit on the
display, press
or
to scroll up or down a
page at a time.
Waypts, Routes
Loading data from the user card to the
Explorer 538/538i
The number of waypoints and routes currently in
the Explorer 538/538i.
This loads one file from the user card to the
Explorer 538/538i:
Track 1 to Track 5
The number of points in tracks 1 to 5 currently in
the Explorer 538/538i.
A waypoints file: The new waypoints are
added to any existing waypoints in the
Explorer 538/538i. If a new waypoint has the
same name as an existing waypoint but has
different data, the Explorer 538/538i displays
both waypoints. Select:
Note:
1
To save Explorer 538/538i data onto the user
card, use the Save command (see below).
2
Data stored on the user card and shown
on the file list is not available to be used by
the Explorer 538/538i until loaded into the
Explorer 538/538i with the LOAD command
(see below).
Skip:Do not load the new waypoint.
Replace: Load the new waypoint and
replace the existing one.
Skip all: Do not load any new
waypoints which have the same names
as existing waypoints.
Saving data to the user card
This saves all the Explorer 538/538i’s waypoints,
all the Explorer’s routes or one of the Explorer’s
tracks to one file on the user card.
Rplc. all: Load all new waypoints
which have the same names as existing
waypoints; the new waypoints replace
the existing waypoints.
1
2
3
Press
and select Save.
Select Waypts, Routes or Tracks.
For Tracks,select the track number to
save.
4
The new file is created. Change the name if
required. The new file appears in the
file list.
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A routes file: The new routes are added to any
existing routes in the Explorer 538/538i. If a
new route has the same name as an existing
route but has different data then the Explorer
538/538i asks which route to keep.
Formatting the user card
Formatting prepares a user card for use. Format
the card if there is an error message saying that the
card is not formatted. Any data files on the card are
deleted.
A track file: The new track will replace the
existing track in the Explorer 538/538i.
1
2
3
Press
and select Card.
Select Format.
Select Yes to confirm.
To load a file to the Explorer 538/538i:
1
2
Select the file to load.
Press
and select Load.
Sorting the file names
This sorts the displayed file names.
Deleting a file from the user card
1
2
Press
and select Sort.
1
2
3
Select the file to delete.
Select sort by Name, Typeor Time.
Press
and select Delete.
Select Yesto confirm.
Reading the file information
This reads the file names from the user card and
displays them. Reading does not load any file
data into the Explorer 538/538i.
1
2
Press
and select Card.
Select Read.
13 About display
To show the about display, press
Other,then select About.
, select
The about display shows:
The software version and date.
The world chart version.
Any card fitted.
The number of waypoints, routes and tracks
in the Explorer 538/538i
Wiring information for the Explorer 538/538i
connectors.
In the unlikely event of having to contact a
Northstar dealer for service, quote the software
version number and date.
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37
14 Setting up the Explorer 538/538i
The Explorer 538/538i has a number of advanced
features which are set up through the setup
menu. We recommend that you become familiar
with the operation of the unit using the default
settings before making any changes to the data
in these menus.
To go to a setup option menu, press
one
or more times to display the setup menu, then
select an option.
Note:
1
2
3
The Setup menu options are explained in the
following sections.
Section 2-1 describes how to set or change
data in the setup menus.
The setup data available will depend on the
optional sensors and instruments installed.
14-1 Setup > System
Press
once or more until the Setup
Backlight
menu is displayed, then select System:
Select the backlight level for the keys and display
(see also section 2-4)
Night mode
Night mode sets the palette for all displays.
Normal palette, for daytime
All displays have a palette optimised for night
time.
See also section 2-4. To change only the chart
palette, see section 17-2.
Key beep
Enables or disables the beep when a key is pressed.
Auto power off
Language
Select the language for the displays. The options
are: English, Italian, French, German, Spanish,
Dutch, Swedish, Portuguese, Finnish and Greek.
See section 2-3.
Tip: In case you can’t read the current
language, the language setting is found at the
top of the system menu.
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Setup option menus
Factory default settings are shown. The setup data available will depend on the optional sensors and
instruments installed.
System
Chart
(see 14-1)
(see 14-2)
Water (14-2)
Others (14-2)
Fuel
(see 14-4)
GPS
(see 14-3)
Track
(see 14-5)
SmartCraft
(see the SmartCraft
Gateway
Installation and
Operation Manual)
Alarms
Units
Comms
Logs
(see 14-7)
(see 14-8)
(see 14-9)
(see 14-6)
Time
Simulate
Calibrate
(see 14-11)
(see 14-12)
(see 14-10)
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Factory reset
This option returns all of the Explorer 538/538i settings (except the language, waypoints and routes) to the
default factory settings shown on the setup menus.
SmartCraft
No SmartCraft gateway is fitted. Disable SmartCraft functions.
Normal SmartCraft operation
See section 15-7.
14-2 Setup > Chart
Press
once or more until the Setup menu is displayed, then select Chart:
Rotation
The options for chart rotation are:
North up:North is always at the top of the chart display.
Track up: The chart is rotated so that the boat direction is to the
top of the display. This option is useful for navigating narrow harbours
or rivers. The Explorer 538/538i asks for a course deviation; this is how
much the boat direction needs to change to make the chart redraw.
Tip: If the chart redraws too frequently, increase the course deviation
setting.
Course up:This option is only available if the boat is navigating
to a destination. The chart is rotated so that the plotted course to the
destination is vertical.
Palette
Select the Color scheme for the LCD display. The options are:
Normal
Sunlight:Brighter Colors, more visible in sunlight.
Night:Reversed Colors for night, to preserve night vision.
Map datum
Explorer 538/538i GPS positions are based on a worldwide reference
(datum) known as WGS 84. Most paper charts are based on WGS 84.
However, some paper charts are based on other datums In these cases,
the latitude and longitude coordinates of objects on the Explorer 538/538i
chart display are different to the latitude and longitude coordinates of
these objects on the paper chart. This applies to all objects, such as the
boat, waypoints, tracks, lines of latitude and longitude and cartographic
features such as land, rocks, buoys and depth contours.
Use Map datum to select the Explorer 538/538i map datum to
match the datum of the paper chart. Then, the latitude and longitude
coordinates of objects displayed on the Explorer 538/538i will change to
match the corresponding coordinates on the paper chart.
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Setting map datum
Map shift
1
2
3
In the Chart setup menu, select Map
datum.
Select the map datum for the paper chart you
are using.
Map shift is for eliminating minor offsets.
It should not be used if the correct datum
is available. Use map shift with caution:
incorrect application will cause incorrect
boat positions.
If you select a datum other than WGS 84 the
Explorer 538/538i asks if you want to apply
the NMEA datum offset (see below).
Some charts have consistent position errors. To
correct this, apply a map shift. After a map shift:
When you change to a chart with a different
datum, change the Explorer 538/538i map
datum again.
The positions of cartographic features (such
as land, rocks, buoys and depth contours)
move on the Explorer 538/538i chart display
to where they should be.
NMEA datum offset
The positions of the boat, waypoints, tracks,
and lines of latitude and longitude on the
Explorer 538/538i chart display remain
unchanged.
If you select a map datum other than WGS 84,
the map datum offset can be applied to latitude
and longitude coordinates sent on the Explorer
538/538i NMEA output:
Applying a map shift
Latitude and longitude coordinates
displayed on any NMEA repeater do not
match the coordinates on the Explorer
538/538i. Latitude and longitude coordinates
broadcast on any NMEA VHF transmitter will
be the same as the coordinates on a WGS 84
chart.
1
Move the boat to a known point on the chart,
for example a marina berth.
2
3
In the Chart setup menu, select Map shift.
Move the cursor to the position on the chart
where the boat actually is.
4
5
Press
Press
and select Set.
Latitude and longitude coordinates
displayed on any NMEA repeaters match
the coordinates on the Explorer 538/538i.
However, latitude and longitude coordinates
broadcast on any NMEA VHF transmitter will
be slightly offset from coordinates on a WGS
84 chart.
to set the new map shift. The
boat will now be displayed at its actual
location.
Clearing the map shift
Clearing the map shift removes any map shift
from the cartographic features on the Explorer
538/538i chart display.
1
In the Chart setup menu, select Map
shift.
2
Press
Press
and select Clear.
3
.
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General submenu
Plotter mode
Normal: only scales available on the chart card can be displayed.
If you press or to select a chart scale which is not available, on the
chart card, the chart display will change to this scale but will only display the
boat position and track (if enabled). The rest of the display is white with black
crosshatch lines and no chart information is displayed. This is useful to zoom to
a small scale to track small boat movements or if there is no detailed chart for
an area.
Anticlutter
Names and icons shown. Note: this is independent of the change in detail
shown at different zoom levels.
hides some less important names and icons to make the chart clearer.
Value added data
Projected course
Non marine chart data shown
The Explorer 538/538i can estimate the course after a given time, based on the
current speed and heading (see section 3-4). The options are 2 minutes, 10
minutes, 30 minutes, 1 hour, 2 hours or Off.
CDI scale
See Appendix C. The options are 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 4.0 and 10.0 distance
units.
Lat/lon grid
Boundaries
displays a latitude and longitude grid.
Displays boundaries around areas where more detailed chart coverage is
available: Autoshows the next four detail levels; On shows all.
Text/icon size
Water submenu
Water features
Select the size of chart text and icons.
displays marine sediment labels (for example, M shows areas of mud) and
tide station icons
Bathymetrics
Displays underwater depth contours between Bath & sndgs min and max.
Spot soundings
Displays depth soundings between Bath & sndgs min and max.
Bath & dndgs min
Bath & dndgs max
Tidal flow
The minimum depth for Bathymetrics and Spot soundings.
The maximum depth for Bathymetrics and Spot soundings.
displays dynamic tide flows: arrows on a chart showing the present tide
stream and orientation (requires a GPS fix and an NT-MAX card)
Other submenu
Waypoints
Displays waypoints: Hide all only displays waypoints on any selected route;
Selected displays waypoints with their display option set to Icon or I+N
(Icon and Name) (see section 5).
Names
displays place names.
Lights
Displays lighthouses: No sector hides any light sectors; On shows all data.
Nav-aids
Displays signals (fog, radar, radio stations) and bouys. Int and US select the
icon format; Simpl draws simpler icons.
Attention areas
displays attention area boundaries and information icons ; attention areas
are important areas, such as restricted anchorages or shallow areas.
Land features
displays land features, for example regioins, rivers, roads, railways, airports
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14-3 Setup > GPS
Press
once or more until the Setup menu
Static Navigation
When the boat stops or moves very slowly, the
calculated GPS speed and course become erratic.
Static navigation is a number, and the options are:
is displayed, then select GPS:
• 0.01 to 99.9:If the boat speed is slower
than this, the speed is displayed as zero and
the course stays unchanged.
• 0(Off):The calculated speed and course
are always used.
Speed and Course Filter
Waves and wind cause the boat speed and
course to fluctuate slightly. To give stable
readings, the Explorer calculates these values
by taking several measurements and averaging
them.
GPS Source
• Internal:Use the internal GPS antenna
(Explorer 538i) or the external GPS antenna
supplied (Explorer 538) (see section 15-5).
A lower value averages measurements over
a shorter period of time. This gives the most
accurate value but has the most fluctuations.
• NMEA:Use an external GPS or DGPS source
connected via NMEA (see section 15-9).
• NavBus:Use an external GPS or DGPS
source connected via NavBus (see section
15-8).
A higher value averages measurements over
a longer period of time. This gives the most
stable value but will ignore some true speed
changes.
DGPS Source
Enables or disables the satellite based DGPS
correction (see section 7). The options are None
or WAAS/EGNOS. Do not enable WAAS/EGNOS
outside their coverage areas or the accuracy of
the position might be degraded.
Set the Speed and Course filters to the lowest
values which give stable readings. The range of
each filter is 1 to 60 seconds or Off (0).
WAAS covers all of the USA and most of Canada.
To use WAAS, the GPS antenna must have a clear
view of the sky towards the equator. EGNOS will
cover most of Western Europe when it becomes
operational.
Restart GPS
Restarts the internal GPS receiver for servicing
or troubleshooting. The GPS receiver takes up
to three minutes to restart. The satellite display
shows the status of the GPS receiver (see section
7). Restart the GPS if the receiver has not been
used for some time and is taking a long time to
get a GPS fix.
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43
14-4 Setup > Fuel
Fuel setup requires optional petrol/gasoline
or SmartCraft sensors to be installed. Set Num
engines first to enable the fuel functions.
Calibrate
SmartCraft fuel sensors are factory calibrated
and should never need recalibrating. Calibrating
Northstar petrol/gasoline sensors gives more
accurate fuel values.
Press
one or more times until the Setup
menu is displayed, then select Fuel:
Twin engine installations require each fuel
transducer to be calibrated. This can be done
at the same time with two portable tanks or at
different times using one portable tank.
Calibrating the fuel transducer(s) requires
accurate measurement of the fuel consumption.
This is best done using a small portable tank. At
least 4 gallons (15 litres) of fuel should be used to
ensure an accurate calibration.
It is often very difficult to fill underfloor tanks to
the same level twice due to air pockets, so the
more fuel used, the more accurate the calibration.
To calibrate the fuel transducer(s), perform the
following steps:
Fuel consumption can change drastically
depending upon the boat loading and the sea
conditions. Always carry adequate fuel for the
journey, plus a reserve.
1. Record the level of the fuel in the tank(s).
2. Connect the portable tank(s) to the engine
through the fuel transducer(s).
3. Run the engine at normal cruising speed until
at least 4 gallons (15 litres) of fuel has been
used per engine.
Tank full
Tells the Explorer 538/538i you have filled a fuel
tank (see section 10-1).
4. Check the actual amount of fuel used per
engine by refilling the portable tank(s) to the
original level and noting the reading(s) from
the fuel dispenser’s gauge.
Set remaining
Tells the Explorer 538/538i you have added or
removed fuel (see section 10-1).
Clear Used
5. Select Fuel.Use the cursor keys to change
the reading for each engine to match that on
the fuel dispenser’s gauge.
Select Clear used to set Used (the amount
of fuel used) to zero. Do this to start measuring
the amount of fuel used over a certain time or
distance.
6. Press
when the reading is correct.
Note: If the fuel calibration options appear to
give erroneous readings after a while, first check
that the fuel sensor has been installed correctly
according to the installation instructions supplied
with it, then see Appendix B - Troubleshooting.
Tank size
Enter the capacity of the fuel tank. Northstar
recommends measuring tank size by draining
the fuel tank, filling it to capacity and using the
fuel dispenser’s reading. Beware of air pockets,
especially in underfloor tanks.
Flow filter
Most engines do not draw fuel from the tank at
a steady rate. To give a stable fuel flow reading,
the Explorer calculates the flow value(s) by taking
several measurements and averaging them. Use
the Flow filter to set the period over which the
fuel flow is averaged.
Num. engines
Set the number of engines to 0,1or 2.If 0is
selected the fuel features are turned off.
44
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The Flow filter can be set from 0to 30 seconds.
Use the lowest value which gives a stable flow.
Usually a value of 5 to 10 seconds will give a
satisfactory result for two-stroke carburettor
engines. Fuel injected or four-stroke engines may
require a larger value.
Speed source
If both paddlewheel sensor and GPS speeds are
available, select the source of speed readings
for fuel calculations. If there is a current or tide,
these speeds and the fuel calculation results will
be different.
This setting affects the Fuel flow and Fuel
economy reading on the Fuel display but it
does not affect the Fuel used reading.
Water speed:Use paddlewheel sensor
speed (boat speed through the water). This
gives a more accurate value for Economy.
Fuel consumption curve
GPS:Use GPS speed (boat speed relative
to land). This gives a more accurate value for
Range.
See section 10-3.
14-5 Setup > Track
Press
one or more times until the Setup
Plotting Interval
menu is displayed, then select Track:
The options are Distance or Time.
Distance
Select the distance plotting interval: 0.01, 0.05, 0.1,
0.5, 1.0, 2.0, 5.0 or 10.0 distance units.
Time
Select the time plotting interval: 1, 5, 10 or 30
seconds or 1 minute.
Memory used
The percentage of memory used in the track
being recorded.
Tip: Use the user card display to check the
number of points recorded in each track (see
section 14).
Tracking records and displays the boat’s course
on the chart (see section 3-5). Five different tracks
can be recorded: track 1 has up to 2000 points
and tracks 2, 3, 4 and 5 have up to 500 points
each.
Send track
This option is included for compatibility with
older units. For information, see your Northstar
dealer.
Record
Off:The Explorer 538/538i tops recording a
Delete track
track.
The data in the track selected for Record (see
above) is deleted.
1to 5(select a track number): The Explorer
538/538i starts recording the boat’s course
into the selected track.
Display
Off:No track is shown on the chart.
1 to 5 (select a track number): The
selected track is shown on the chart.
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14-6 Setup > Logs
Press
one or more times until the Setup
The values can be changed independently of
each other. These log values are saved when the
unit is turned off.
menu is displayed, then select Logs:
Reset trip dist
This resets the trip distance to zero.
Reset total dist
This option resets the total distance to zero.
Reset engine hours
Use this option to reset the engine hours
to zero. This can be useful after an engine service
or to count the engine hours between service
intervals.
14-7 Setup > Alarms
Press
one or more times until the Setup
to turn the alarm off. For the other alarms, enter
a trigger value to turn the alarm on. The alarm
will sound each time the alarm value equals the
trigger value. For example, the Danger alarm
will sound if the boat comes closer to a danger
waypoint than the trigger value and the Anchor
alarm will sound if the boat moves by more than
the trigger value. To turn these alarms off, enter a
trigger value of 0 (zero).
menu is displayed, then select Alarms:
Icons for alarms that are on can be displayed in
the data header (see section 2-8-2). An alarm icon
is normally black and turns red when the alarm
sounds.
All alarms except Loss of GPS fix can be
turned on (enabled) or off (disabled).
For the XTEand Loss of DGPS fix
alarms, select to turn the alarm on or select
Symbol
Alarm
Alarm sounds when it is on and the:
Arrival
radius
boat is closer to the destination or to a waypoint
than the alarm trigger value
Anchor alarm
XTE
boat moves by more than the alarm trigger value
boat moves off course by more than the CDI scale
(see section 14-2)
Danger
boat comes closer to a danger waypoint than
the alarm trigger value
Low fuel
fuel remaining equals the alarm trigger value
Loss of
DGPS fix
Explorer 538/538i can not receive the DGPS signal
(beacon, WAAS or EGNOS)
Loss of
GPS fix
Explorer 538/538i can not receive the GPS signal
(this alarm is always on)
46
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14-8 Setup > Units
Press
one or more times until the Setup
Depth
menu is displayed, then select Units:
ft (feet), m (metres) or fa (fathoms)
Fuel
Litres, USGal (US gallons) or ImpGal (Imperial
Gallons)
Compass
°T (True north) or °M (Magnetic north)
Temperature
°F (Fahrenheit) or °C (Celsius)
Wind (optional)
Requires a wind instrument: True or App
(Apparent)
The default units are shown above.
Note: that the units for wind speed are the speed
Distance
units.
nm (nautical miles), mi (miles) or km (kilometres)
Pressure
Speed
Requires SmartCraft: kPa or psi
kn (knots), mph (miles per hour) or kph
(kilometres per hour)
Baro (Barometric pressure)
Requires a Northstar VHF receiver connected by
NavBus: InHg or mB.
14-9 Setup > Comms
Use this feature when the Explorer 538/538i
is connected to other Northstar instruments
through NavBus or any compatible NMEA
instrument.
Lat/lon dps
Select the number of decimal points used
for latitude and longitude transmitted in
NMEA sentences.
Press
once or more until the Setup
NavBus
menu is displayed, then select Comms:
NavBus is the preferred method for connecting
the Explorer 538/538i to other Northstar
instruments. Select this if the instruments are
connected using NavBus.
NavBus Group
Use this when a group of Northstar instruments
are connected together using NavBus, to specify
a group of instruments for backlighting, if
required. Then, if the backlight setting on one
instrument in the group is adjusted, the other
instruments change automatically. Otherwise,
select 0. See section 15-8.
NMEA out
NMEA is generally used with third party
instruments (see section 15-9). Select this to
transmit NMEA sentences, for example to an
autopilot.
NMEA data
Use this to specify which NMEA sentences will be
transmitted (see section 15-9 and Appendix A).
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14-10 Setup > Calibrate
Press
once or more until the Setup
Fuel
See section 14-4.
menu is displayed, then select Calibrate:
Speed range
The maximum reading to display on an analog
boat speed gauge (see section 10). Choose a
range suitable for your boat.
Max fuel flow
The maximum fuel flow from the fuel tank.
14-11 Setup > Time
Press
once or more until the Setup
Local offset
menu is displayed, then select Time:
The difference between local time and UTC
(GMT). Change local offset when daylight saving
time starts and ends. The range is 0 to 13 hours,
in 30 minute steps.
Time format
The options are 24 hour or 12 hour.
Date format
The options are dd/MMM/yy, MMM/dd/yy,
dd/MM/yy or MM/dd/yy.
14-12 Setup > Simulate
Simulate mode is a way of becoming familiar with
the Explorer 538/538i (see section 2-7).
Press
once or more until the Setup
Never have simulate mode on when the
Explorer 538/538i is navigating on the water.
menu is displayed, then select Simulate:
Mode
There are two choices for Mode:
1 Normal
Simulates the boat moving from the selected
start point at the given speed and heading. The
options required for Normal are:
Speed: The simulated boat speed to use.
Course: The simulated bearing for the boat
Simulate
to follow.
Turn simulate mode off
Turn simulate mode on
48
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Note: To select the start point, go to the chart display before starting the simulation. Then:
•
•
To start the simulation from the boat position, press
to switch to centre on boat mode.
To start the simulation from a different point, move the cursor to that point on the chart.
Tip: To calculate a course, use the cursor (see section 3-3).
Tip: As the boat moves, vary Course to simulate the boat moving off course.
2 Demo
Simulates a boat moving along a route and automatically displays different Explorer 538/538i functions.
The options required for Demo are:
Speed: The simulated boat speed to use.
Route: The route to follow.
15 Installation
Correct installation is critical to the performance of the unit. It is vital to read the entire installation
section of this manual and the documentation that comes with the antenna and any other units before
starting installation.
15-1 Installation: What comes with the Explorer 538/538i
•
•
•
•
•
•
•
Explorer 538 or 538i display unit
Dust cover for display unit
Blanking caps for unused connectors
Power cable
Mounting bracket (screws included)
Flush mounting kit
Northstar 133 GPS antenna for Explorer 538 only;
the Explorer 538i has a built in GPS antenna.
Warranty registration card
•
•
This manual
15-2 Installation: Options and Accessories
•
•
•
•
C-MAP™ NT-MAX, NT+ or NT chart cards.
C-MAP™ user cards (3 V) for storing data. (The older 5 volt cards are not supported)
Northstar carry bag.
Northstar NavBus junction boxes simplify wiring, particularly if several instruments are connected.
For more information, see the NavBus Installation Manual.
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Optional sensors and instruments
External alarms: Lights or sounders in the boat
to sound alarms through the boat (see section
15-4).
SmartCraft: With one or two SmartCraft capable
Mercury engines, the Explorer 538/538i can
display engine data and trim and can control troll
speed (see section 18-10).
GPS or DGPS antenna: For GPS navigation, see
section 15-5.
Other instruments: The Explorer 538/538i can
receive data from other instruments and send
data to other instruments by NavBus or NMEA
(see sections 18-12 and 18-13).
Fuel sensors: For fuel functions. The Explorer
538/538i can use these optional fuel flow sensors,
fitted to one or two engines:
Please consult your Northstar dealer for more
information.
•
Northstar petrol/gasoline sensors (see
section 15-6)
•
SmartCraft fuel sensors (see section 18-11)
Connections
GPS antenna (Explorer 538, 15-5)
Power (15-4)
Display unit
(15-3)
External alarms (15-4)
NavBus instruments (15-8)
NMEA out to instruments (15-9)
Black
Whhite
Petrol/gasoline sensors (15-6),
NMEA in (15-9)
Power/data cable
Pin Wire
Function
1
Black
Ground: - power in, NMEA ground. (The cable has two black wires which are
connected inside the cable and it does not matter which black wire you use)
2
3
4
5
6
7
8
Brown
White
Blue
Power out, 9 V DC (not used)
NMEA out
NavBus-
Red
+ power in, 10 to 16 V DC
Orange NavBus+
Yellow
Green
Auto power in
External alarm out, 30 V DC 200 mA maximum.
50
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15-3 Installation: The display unit
Select a position for the display unit:
•
At least 4” (100 mm) away from the compass,
at least 12” (300 mm) away from any radio
transmitter and at least 4 ft (1.2 m) away from
any antenna.
For the Explorer 538i, with the internal GPS
antenna:
The display unit must have a good view of
the sky and horizon. The view should not be
blocked by large parts of the superstructure.
•
Easy to read and operate. If possible, mount
the display unit in front of the navigator or to
the right of the navigator because the LCD
display is more readable from these positions.
The unit can be under glass, perspex,
fibreglass or fabric, but not under metal or
wood.
•
•
Not exposed to the direct sun or water and
protected from physical damage during
rough sea passages.
Do not mount the unit within 3 m (10 ft) of a
radio transmitter antenna or within 0.5m (20
in) of the plane of a radar antenna.
Easy to access the 12 V DC power source and
convenient to route the transducer cables.
There are two mounting arrangements:
2 Bracket Mounting
1 Flush Mounting
Requires a panel for mounting the bracket. Ensure
that the panel is not likely to deform and is not
subject to excessive vibration. The bracket can
be tilted and rotated. The display unit can be
removed when it is not in use.
Requires a solid panel with access behind
for wiring and mounting screws. After flush
mounting, the display unit cannot be tilted or
moved after installation to reduce any unwanted
glare or reflections. Carefully select the best
viewing position before installation. This would
generally be in a shaded area.
1
Hold the bracket in place and mark the screw
holes.
1
2
3
4
Cut a hole in the bulkhead for the display unit
using the flush mount template.
2
Drill the screw holes and screw the bracket in
place. Do not overtighten the screws or the
display unit might not rotate.
Drill four holes for the mounting studs using
the flush mount template.
3
Hold the display unit in place on the
mounting bracket shaft. Hand tighten the
knob on the mounting bracket.
Screw the four studs into the brass inserts in
the back of the display unit.
Sit the display unit in place and fit the
washers and nuts to the studs.
Knob
Mounting
bracket
Explorer 460
Explorer 560
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15-4 Installation: Power/Data cable
The power/data cable has a black locking collar and flying leads.
1
Wire the Explorer 538/538i for auto power to have the Explorer 538/538i turn on with the boat’s
ignition switch or to to record engine hours or if the Explorer 538/538i must add up the total fuel
used (for example if Northstar petrol/gasoline fuel sensors are installed or if SmartCraft is installed
without fuel tank level sensors). Otherwise wire for basic power (for more information, see section
2-2).
Basic power
Power/data cable
Red
Black
Fuse 2A
Yellow
Main switch
Black
12 V DC]
Auto power
During setup, set up Auto power off (see sections 2-3 and 17-1)
Power/data cable
Ignition
Yellow
Black
Fuses 2A
Ignition switch
Main switch
12 V DC]
Red
Black
2
3
Wire any external alarm beepers or lights.
The alarm output switches to ground to
sound the alarm. If the current is more than
200 mA, fit a relay.
Power/data cable
Red
Black
Green
Connect the power/data cable to the black
display unit connector; turn the collar to
lock the connector.
External beepers or
lights
52
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15-5 Installation: GPS antenna
Selecting an antenna
Fit one of these GPS antennas:
Installing an antenna
If an external antenna is required, install the
antenna and fit the antenna cable back to the
display unit. Follow the instructions in the manual
supplied with the antenna. Fit an optional
Northstar extension cable if required.
•
Normally use the internal GPS antenna
(Explorer 538i) or the GPS antenna supplied
(Explorer 538).
•
An optional differential beacon DGPS
antenna to give enhanced accuracy within
range of land based differential beacons
in areas where WAAS or EGNOS are not
available. Such a DGPS antenna has both a
GPS receiver and a beacon receiver, and it
automatically applies the beacon correction
to the GPS position.
Connect the Explorer 538 external antenna to the
gold Explorer connector:
•
A compatible GPS or DGPS instrument or
antenna connected by NavBus (see section
15-8) or NMEA (see section 15-9). In this case,
the Explorer 538/538i does not need its own
antenna.
During setup, configure the Explorer for the
chosen antenna, see section 17-4.
Note:
•
The Explorer 538/538i can apply the WAAS
and EGNOS DGPS correntions to any GPS
antenna.
•
To configure the Explorer 538/538i for
different antenna options, see section 14-3.
For more information, contact your Northstar
dealer.
15-6 Installation: Northstar petrol/gasoline sensors
Fit the optional petrol/gasoline fuel kit following
the instructions supplied with the kit.
Note:
SmartCraft engines have fuel flow sensors,
therefore Northstar fuel sensors are not
required as well.
For dual engines, fit two kits.
Fuel sensor cable
Wire the Explorer538/538i for auto power
(see section 15-4).
White
During setup:
a
set up Auto power off(see sections 2-3
and 17-1)
b
set the fuel data (see section 14-4)
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15-7 Installation: SmartCraft
If the boat has one or two SmartCraft capable
Mercury petrol/gasoline engines, connect the
Explorer 538/538i to the SmartCraft engines with
an optional SmartCraft gateway. The display unit
can display engine data and trim and can control
troll speed.
During setup enter the SmartCraft setup data.
For information on installing, setting up and
using SmartCraft, see the SmartCraft Gateways
Installation and Operation Manual.
Note:
Other wiring
Fit a single gateway for single engines and a
dual gateway for dual engines.
Power/fuel splitter
cable (‘Y’ cable)
Black
SmartCraft engines have fuel flow sensors,
therefore Northstar fuel sensors are not
required as well.
White
SmartCraft
gateway
If the fuel tank does not have SmartCraft level
sensors, wire for auto power (see section
15-4).
15-8 Installation: Other NavBus instruments
NavBus is Northstar’s system for connecting
instruments together to interchage data and
share transducers. When instruments are
connected by NavBus:
Receive barometric pressure from an optional
Northstar VHF radio. The Explorer can display:
Baro: barometric pressure
Baro history: barometer history
If the units, alarms or calibration are changed
in one instrument, then the values will
automatically change in all other instruments
of the same type.
Weather: a predication, based on changes in
barometric pressure
Fish forecaster: a prediction based on
changes in barometric pressure
Each instrument can be assigned to a group
of instruments. If the backlight is changed in
an instrument in group 1, 2, 3 or 4 then the
backlight will automatically change in the
other instruments in the same group.
Receive data from an optional GPS or
GPS/DGPS source.
Send data to optional Northstar instruments,
for example to a repeater.
If the backlight is changed in an instrument
in group 0 then no other instruments are
affected.
During setup for NavBus instruments, set
NavBusto
and assign the instrument a
NavBus groupnumber (see section 14-9)
If an alarm sounds, mute it by clearing the
alarm on any instrument which can display
that alarm.
NavBus and the Explorer 538/538i
Black
The Explorer 538/538i can:
Power/data cable
Display wind speed and direction from an
optional Northstar Wind instrument.
Orange
Blue
Receive and display depth from an optional
Northstar depth instrument.
NavBus wires
to other Navbus instruments
Receive and display boat speed and water
temperature from a paddlewheel sensor on
an optional Speed instrument.
54
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15-9 Installation: Other NMEA instruments
NMEA is an industry standard for interconnecting
instruments. It is not as flexible or as easy to install
as NavBus. The Explorer 538/538i can:
Power/data cable
White NMEA out
Receive and display wind speed and
direction from an optional compatible wind
instrument.
Black
Black NMEA ground
White NMEA in
Receive and display depth, paddlewheel
boat speed and water temperature from an
optional compatible instrument.
White
Receive data from an optional compatible
GPS or GPS/DGPS source.
During setup to send NMEA data to other
Send GPS position and other navigation
data to an autopilot or other instrument.
An autopilot requires APB, APA and VTG
sentences (see section 14-9).
instruments, set NMEA outto
and specify
the NMEA datato send (see section 14-9).
For information on sending NMEA data to the
Explorer, see your Northstar dealer.
15-10 Installation: Setup and test
Setup and test
5
6
Enter setup data to set up the Explorer
538/538i to your requirements and to set
up any optional sensors or instruments (see
section 14).
1
Put a blanking cap on any unused connector
on the back of the display unit. Ensure all
connectors are plugged in and the display
unit is in place.
At the satellite display, check that it picks
up GPS satellites. Wait for the GPS receiver
to start up and the fix type to change from
‘Acquiring’ to ‘GPS fix’. This should take less
than two minutes (see section 7).
2
If the display unit is bracket mounted, adjust
tilt and rotation for best viewing and hand
tighten the knob.
3
4
Insert any required C-MAP chart card (see
section 1-3).
7
Go on a test run to check that the navigation
equipment works correctly, particularly when
a radio transmitter or radar is used.
Turn the instrument on (see section 2-3).
When the Explorer 538/538i is turned on for
the first time, it displays an installation menu:
i
Select the language to use.
ii Change the data if necessary (see section
2-1)
iii When the setup data is correct, press
.
This data can be changed later (see section 14).
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55
Appendix A - Specifications
GENERAL
FUEL COMPUTER
Size: 126 mm H x 126 mm W x 65 mm D (5.0”x
(Optional fuel sensor(s) required)
Engine types:
5.0”x 2.6”)
Display: 3.8”diagonal, TFT Color, 240 x 320 pixels
Backlight: Display and keys
Supply voltage
Outboard carburetted two stroke and EFI
petrol/gasoline engines: 50 to 300 hp.
Outboard four stroke petrol/gasoline engines:
90 to 300 hp.
10 to 16 V DC.
Inboard petrol/gasoline engines: 70 to 400 hp.
Supply current: at 13.8 V
120 mA min - no backlighting
220 mA max - full backlighting
Flow rate:
Minimum: 5 litres per hour (1.3 U.S. gallons per
hour).
External beeper or light output: Switched
to ground to sound alarm, 30 V DC, 200 mA
maximum.
Maximum: 130 litres per hour (34 U.S. gallons
per hour).
COMMUNICATIONS
NavBus
Operating temperature
0° to 50°C (32° to 122°F)
ALARMS:
Connection to other Northstar instruments.
NMEA
User set: Arrival radius, anchor, XTE, danger,
low fuel (optional), loss of DGPS fix
NMEA 0183 ver 2 4800 baud
Fixed: Loss of GPS fix
•
Inputs from compatible instruments: DBT, DPT
(preferred), GGA, GLL, GSA, GSV, MTW, MWV,
RMC, VHW, VTG
GPS NAVIGATION
Chart card: C-MAP™ NT-MAX, NT+ or NT
User card: 3.3 V C-MAP™
Outputs, for compatible instruments: APA, APB,
BWR, GGA, GLL, GSA, GSV, RMB, RMC, VTG, XTE
Waypoints: Up to 3000, with default or
user-defined alphanumeric names up to eight
characters.
STANDARDS COMPLIANCE
EMC:
USA: FCC Part 15 Class B.
Europe: (CE) EN301843-1:2004-06.
Routes: 25 Routes, with up to 50 points each
Tracks: By time or distance, one track of 2000
points and four of 500 points.
New Zealand and Australia: (C Tick) EN60945
9.2 & 9.3.
Chart datums
Environment: IPx6/IPx7/CFR46 (with card holder
121 Chart datums (see next page)
One user-defined map shift.
and connections in place).
Chart scale: 0.05 to 4096 nm for chart (chart
dependent) down to 0.01 nm in plotter mode.
56
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30.5mm 34.3mm
126.0mm (5.0”)
(1.2”)
(1.37”)
88.5mm (3.5”)
List of datums
Adindan
Afgooye
Anna 1 Astro 1965
ARC 1960
Astro DOS 71/4
Australian Geodetic 1966
Bellevue (IGN)
Bogota Observatory
Campo Inchauspe 1969
Cape Canaveral
Chua Astro
Dabola
DOS 1968
European 1979
Geodetic Datum 1949
Gunung Segara
Hermannskogel
Hu-Tzu-Shan
AIN EL ABD 1970
American Samoa 1962
ARC 1950
Astro Beacon ‘E’1945
Astro Tern Island (Frig) 1961
Ayabelle Lighthouse
Bissau
Camp Area Astro
Cape
Chatham Island Astro 1971
Corrego Alegre
Djakarta (Batavia)
European 1950
Gan 1970
Antigua Island Astro 1943
Ascension Island 1958
Astro Station 1952
Australian Geodetic 1984
Bermuda 1957
Bukit Rimpah
Canton Astro 1966
Carthage
Co-ord. Sys.1937 Estonia
Deception Island
Easter Island 1967
Fort Thomas 1955
Graciosa Base Sw 1948
GUX 1 Astro
Guam 1963
Herat North
Hong Kong 1963
Indian 1954
Hjorsey 1955
Indian
Indian 1975
Indian 1960
Indonesian 1974
ISTS 073 Astro 1969
Kerguelen Island 1949
L. C. 5 Astro 1961
Luzon
Massawa
Minna
Nahrwan United Arab Emirates
North American 1927
Observatorio Meteorolog. 1939
Oman
Pitcairn Astro 1967
Porto Santo 1936
Puerto Rico
Ireland 1965
Johnston Island 1961
Kertau 1948
Leigon
M’Poraloko
ISTS 061 Astro 1968
Kandawala
Kusaie Astro 1951
Liberia 1964
Mahe 1971
Merchich
Midway Astro 1961
Nahrwan Masirah Is. Oman
Naparima, BWI
North Sahara 1959
Old Hawaiian
Pico de las Nieves
Pointe Noire 1948
Provis. South Chilean 1963
Qatar National
Montserrat Island Astro 1958
Nahrwan Saudi Arabia
North American 1983
Old Egyptian 1907
Ord. Survey Great Britain 1936
Point 58
Provis. South American 1956
Pulkovo 1942
Qornoq
Reunion
Santo (DOS) 1965
Schwarzeck
Rome 1940
Sao Braz
Selvagem Grande 1938
South American 1969
Timbalai 1948
Viti Levu 1916
Wake Island Astro 1952
Yacare
S-42 (Pulkovo 1942)
Sapper Hill 1943
Sierra Leone 1960
South Asia
Tokyo
Voirol 1874
S-JTSK
Tananarive Observatory 1925
Tristan Astro 1968
Voirol 1960
Wake-Eniwetok 1960
Zanderij
WGS 84
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Appendix B - Troubleshooting
This troubleshooting guide is written with
the assumption that the user has read and
understood the relevant sections in this manual.
to ensure that the display unit is reassembled
correctly and is waterproof. Users who service the
product themselves will void the warranty.
It is possible in many cases to solve difficulties
without having to send the display unit back to
the manufacturer for repair. Please follow this
troubleshooting section before contacting the
nearest Northstar dealer.
Repairs to the product may only be carried out
by a service centre approved by Northstar. If the
product must be sent into a service centre for
repair, it is essential to send in the transducer(s) at
the same time.
There are no user serviceable parts. Specialized
methods and testing equipment are required
More information can be found on our Website:
B-1 General Problems
1-1 The Explorer 538/538i won’t turn on:
f
Check for corrosion on the power cable
connector and clean or replace if required.
a
The Explorer 538/538i is designed to operate
on a 12 volt battery system, where the
voltage may vary from 10 to 16 volts. If an
excessive voltage is supplied, a fuse will be
tripped, turning the display unit off. Check
the fuse.
g
Check fuses that are placed in line with the
power cable. A fuse can be blown despite
appearing to be good or the fuse may be
corroded. Test the fuse or replace it with a
fuse known to be good.
b
c
Check that the power cable connector at the
back of the display unit is securely plugged
in and the collar is locked in place. The collar
must be secure for watertight connection.
1-2 The Explorer 538/538i won’t turn off:
The Explorer 538/538i may have been wired
for Auto power. In this case, the Explorer
538/538i cannot be turned off while the
ignition power is on (see section 2-3).
Measure the battery voltage while the battery
is under load - turn on some lights, radio or
other electrical equipment connected to the
battery. If the voltage is less than 10 volts:
1-3 If the Explorer 538/538i beeps when
turned on but nothing is displayed:
The Explorer 538/538i may be operating, but
the backlight settings may have been set too
low (see section 2-4).
-
the battery terminals or wiring on the
terminals may be corroded.
-
the battery may not be charging
correctly or may need replacing.
1-4 The wrong language is displayed:
See section 14-1.
d
e
Inspect the power cable from end to end for
damage such as cuts, breaks, squashed or
trapped sections.
Ensure that the red wire is connected to the
positive battery terminal and the black wire
to the negative battery terminal. If wired for
the Auto Power option, ensure the yellow
wire is connected to the ignition circuit. Also
check the boat’s main switch circuit (see
section 15-4).
58
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B-2 GPS navigation problems
2-1 No GPS fix or long time to get fix at
startup:
2-6 Autopilot not responding to Explorer; no
NMEA output:
a
May occur occasionally if the antenna does
not have a clear view of the sky. The satellite
positions are constantly changing.
a
NMEA output disabled or the required NMEA
sentences are not turned on. Check NMEA
settings (see section 17-10).
b
c
Antenna cable not connected to display unit.
Restart the GPS (see section 14-3).
b
Check that the instrument is connected
correctly.
2-7 No DGPS fix or loss of DGPS fix:
2-2 Explorer GPS position different from true
position by more than 10 m (33 ft):
a
To receive a DGPS fix, WAAS/EGNOS must be
enabled or an optional DGPS antenna fitted
(see section 7).
a
b
c
Explorer in simulate mode. Turn simulate
mode off (see section 14-12).
b
c
With WAAS/EGNOS: Boat out of coverage
area (see section 7).
The normal error in GPS position will exceed
10 m (33 ft) for about 5% of the time.
With WAAS: GPS antenna does not have a
Under special circumstances the US
Department of Defence may introduce a
deliberate and changing error in the GPS
positions of up to 300 m (1000 ft).
clear view of the horizon towards the equator.
b
With beacon DGPS: boat out of range of a
DGPS beacon.
2-3 Explorer position different from same
position on local charts:
a
b
c
Explorer in simulate mode. Turn simulate
mode off (see section 14-12).
Incorrect chart datum. Select the correct
chart datum (see section 14-2).
Map shift has been applied wrongly. Clear map
shift, then reapply if necessary (see section 14-2).
2-4 Can not see boat on chart:
Press
to switch to centre on boat
mode (see section 3-2-1).
2-5 The time or date on satellite display is
wrong or off:
a
No GPS fix.
b
In simulate mode. Turn simulate mode off
(see section 14-12).
c
Local time offset is wrong (see section 14-11).
The Local Time Offset must be changed
when daylight saving time starts or ends.
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B-3 Fuel consumption problems
Note: For the Explorer 538/538i to measure fuel
consumption, the optional fuel flow kit must be
fitted.
3-3 A twin engine installation shows only one
flow rate:
a
Check that the number of engines is set to 2
(see section 14-4).
3-1 Fuel used or remaining seem inaccurate:
Explorer is not wired for auto power (see
section 15-4).
3-4 Erratic Fuel Flow readings:
a
The fuel flow transducer may have been
mounted too close to the fuel pump or may
be subject to excessive vibration. Refer to the
installation instructions supplied with the fuel
transducer.
b
In rough seas, fuel may surge back and forth
through the fuel transducer, resulting in
incorrect readings. Try installing a one-way
valve between the fuel transducer and the
fuel tank.
b
c
Check for leaks in the fuel line or in the fuel
pickup in the tank.
c
The Set remainingfuel value must be
reset after every refuelling (see section 10-1).
The Flow filtervalue is not suitable for
the engine. Check that the value is not set
to zero, then try increasing the value until a
steady flow rate is shown (see section 14-4).
d
The fuel tank may not refill to the same capacity
each time due to air pockets. This is particularly
noticable with underfloor tanks.
e
Fuel transducers wear out over time and
should be replaced after every 5000 litres of
fuel.
3-5 There is no reading for fuel economy:
a
The boat must be travelling through the
water to generate an Economyreading.
3-2 Flow indicates no fuel or low fuel:
b
Check that the paddlewheel on the
transducer is spinning freely and that the two
magnets in the paddlewheel are still
in place.
a
Check that the number of engines is set to 1
(see section 14-4).
b
Check that the fuel cable connectors are
securely plugged in and the collar is locked
in place. The collar must be locked in place to
give a watertight connection.
c
A fuel transducer may be clogged. If so,
remove the transducer from the fuel line
and gently blow through it in the opposite
direction to the fuel flow.
A fuel filter between the fuel transducer and
the fuel tank must be installed as per the fuel
installation guide. Failure to do so will void
the warranty.
d
e
Inspect the fuel cable from end to end for
damage such as cuts, breaks, trapped or
squashed sections.
Check that the fuel filter is clean.
60
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Appendix C - Glossary and navigation data
Glossary
MOB - Man overboard.
Attention Area - An important area on a chart,
such as a restricted anchorage or a shallow area
(see section 14-2).
MOB function - Starts navigating back to the
place where someone fell overboard (see section
2-5).
Bathymetric line - A depth contour line on
the chart.
NavBus - A way of connecting Northstar
instruments together to share data (see section
15-8).
Chart card - A plug-in card that stores chart data
for a region (see section 1-3).
NMEA - National Marine Electronics Association.
C-MAP™ chart card - See Chart card.
NMEA 0183 - A standard for interfacing marine
C-MAP™ user card - See User card.
electronic devices (see section 15-9).
Cursor - A
symbol on the display (see section
Route: Two or more waypoints linked in
sequence to form a course for the boat (see
section 6).
3-2).
DGPS - Differential Global Positioning System. A
navigation tool based on GPS with some errors
corrected (see section 7).
User card - A plug-in card that stores waypoints,
routes and tracks (see section 1-2).
Goto - A simple way of navigating straight to a
waypoint or to the cursor position (see section
3-1).
UTC - Universal Time Coordinated or Coordinated
Universal Time, which is a standard world time,
formerly called Greenwich Mean Time (GMT).
GPS - Global Positioning System. A satellite-
Waypoint - A position that you can set on the
Explorer chart, for example a fishing spot or a
point on a route (see section 5).
based navigation tool (see section 7).
Leg - The straight segments of a route between
waypoints. A route with four waypoints has three
legs.
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61
Navigation data
The boat is sailing from the start to the destination and has moved off the plotted course from the start
to the destination.
BRG
Bearing to Destination: Bearing to the destination from the boat.
BRG Bearing to cursor: Bearing to cursor from boat (cursor mode, see section 3-2)
CDI
Course Deviation Indicator: When the boat is navigating to a point, the chart and highway
displays show a parallel line on either side of the plotted course. These two lines are called
the Course Deviation Indicator (CDI) lines. The distance from the plotted course to a CDI line
is the CDI scale.
Set the CDI scale (see section 14-2) to the maximum distance that the boat should deviate
from the plotted course. The chart and highway displays show the CDI lines, which are like
a highway over the water where the boat will move. The displays show how far the boat has
deviated from the plotted course and if the boat is approaching a CDI line. If the XTE alarm is
enabled (see section 14-7) an alarm will sound if the boat reaches a CDI line.
COG
CTS
DTG
ETA
Course Over Ground: Direction in which the boat is moving over the ground.
Course To Steer: Optimum course to steer to return to the plotted course.
Distance To Go: Distance from the boat to the destination.
Expected Time of Arrival: At the destination, assuming that SOG and COG remain constant.
RNG Range to cursor: Distance from boat to cursor (cursor mode, see section 3-2)
SOG
Speed Over Ground: Current boat speed over the ground. This is not necessarily the same as
the boat speed through the water nor the speed at which it is approaching the destination.
STR
TTG
XTE
Steering: The difference between COG and CTS.
Time To Go: The estimated time to reach the destination.
Cross Track Error: The distance from the boat to the nearest point of the plotted course. XTE
may have a letter: R means steer to the right to return to the plotted course, L means steer to
the left.
VMG
Velocity Made Good: The speed at which the boat is approaching the destination.
Destination
Destination
Plotted
course
DTG (distance)
VMG (speed)
XTE
(distance)
SOG (speed)
Boat
position
BRG
COG
STR
CTS
CDI scale
(distance)
CDI scale
(distance)
Plotted
course
Boat position
Start
Start
62
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AMERICAS
30 Sudbury Road,
EUROPE
Unit 2, Ocean Quay,
Belvidere Rd, Southampton,
SO14 5QY, ENGLAND
Ph: +44 2380 339922
Fax: +44 2380 330345
Acton, MA 01720, USA
Ph: +1 978.897.6600
Ph: +1 800.628.4487
Fax: +1 978.897.7241
AUSTRALIA
PO Box 479,
NEW ZEALAND
PO Box 68 155,
Gladesville, NSW 2111,
AUSTRALIA
Newton, Auckland
Auckland, NEW ZEALAND
Ph: +64 9 481 0500
Fax: +64 9 481 0590
Ph: +61 2 9879 9060
Fax: +61 2 9879 9009
Made in New Zealand
MN000594A-G
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