NorthStar Navigation Fish Finder Explorer 721EU User Manual

Explorer 721US / 721EU

VHF Marine Radio

Operation and Installation Manual

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Contents

Section 1 - General Information ............................................................................................................... 6

1-1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-2 Customize your Northstar VHF Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-3 How to Display and Navigate Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-4 How to Enter or Change Alphanumeric Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-5 LCD Symbols and Meanings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-6 How the Microphone and Optional Handset Work Together. . . . . . . . . . . . . . . . . . . . . . 9

1-7 Basic Operation and Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Section 2 - The Radio Menu (MENU) ..............................................................................................13

2-1 The Radio Menu Options (MENU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2-2 Show Weather, SNR, or Happy Fish on Handset (INFO DATA) . . . . . . . . . . . . . . . . . . . . . 14

2-3 Maintain Your Buddy List (BUDDY LIST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2-4 Local or Distance Sensitivity (LOCAL/DIST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2-5 Backlighting (BACKLIGHT) and Contrast (CONTRAST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2-6 GPS Data and Time (GPS/DATA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2-7 GPS Simulator (GPS SIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

2-8 Reset to Factory Defaults (RESET). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Section 3 - The Radio Setup Menu (RADIO SETUP) ..................................................................................... 21

3-1 The Radio Setup Menu Options (RADIO SETUP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3-2 Select the Channel Bank (UIC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3-3 Change Channel Names (CH NAME). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3-4 Ring and Beep Volume (RING VOL) and (KEY BEEP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3-5 Internal Speaker Connections (INT SPEAKER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3-6 Set the Priority Channel (WATCH MODE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3-7 Weather Alert (Wx ALERT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3-8 NMEA or NAVBUS Protocol (COM PORT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3-9 Barometric Displays (BARO SENSOR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3-10 Temperature Display (TEMPERATURE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Section 4 - The DSC Setup Menu (DSC SETUP) ............................................................................................ 26

4-1 The DSC Setup Menu Options (DSC SETUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4-2 Check Your User MMSID (USER MMSID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4-3 Maintain Your Groups (GROUP SETUP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4-4 Response to Individual Calls (INDIV REPLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4-5 ATIS MMSID & ATIS Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

4-6 DSC Functionality (DSC FUNC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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4-7 Response Type to LL Polling Calls (LL REPLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

4-8 Mute the Notification Ring Tone (LL RING). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Section 5 - Send and Receive DSC Calls..................................................................................................... 30

5-1 What is DSC? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

5-2 The DSC Call Menu Options (DSC CALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

5-3 Call an Individual (INDIVIDUAL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5-4 Call the Most Recent Incoming Call (LAST CALL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5-5 Call a Group (GROUP CALL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5-6 Call All Ships (ALL SHIPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5-7 Call using the Call Log (CALL LOG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5-8 Call using the Distress Log (DIST LOG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

5-9 Request the LL Position of a Buddy (LL REQUEST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

5-10 Receive an All Ships Call (RCV: ALL SHIPS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5-11 Receive an Individual Call (RCV: INDIV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5-12 Receive a Group Call (RCV: GROUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

5-13 Receive a Geographic Call (RCV: GEOGRAPH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

5-14 Receive a Polled Position Call (RCV: POSITION). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Section 6 - Distress Calls.......................................................................................................................... 37

6-1 Send a Distress Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6-2 Receive a Distress Acknowledgement (DISTRESS ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6-3 Receive a Distress Call (RCV: DISTRESS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

6-4 Relay a Distress Call (RCV: DISTRESS RELAY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

6-5 Relay a Distress Call from the Distress Log (RELAY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Appendix A - Technical Specifications...................................................................................................... 39

Appendix B - Troubleshooting................................................................................................................. 41

Appendix C - VHF Marine Channel Charts ................................................................................................. 42

Appendix D - MMSID and License Information ......................................................................................... 54

Section 7 - Install the Explorer 721 .......................................................................................................... 55

7-1 Installation Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7-2 Location Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7-3 Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7-4 Gimbal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

7-5 Change the Viewing Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

7-6 Recessed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

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7-7 Install the Microphone Bulkhead Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

7-8 Connect the Radio Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

7-9 Set Up the Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7-10 Enter Your User MMSID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7-11 The Completed Installation (with Optional Handset) . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

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.

RF Emissions Notice:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.

This device’s antenna must be installed in accordance with provided instructions; and it must be operated

with minimum 96 cm spacing between the antennas and all person’s body (excluding extremities of

hands, wrist and feet) during operation. Further, this transmitter must not be co-located or operated in

conjunction with any other antenna or transmitter.

IMPORTANT:

1. Some features described in this manual are not available on every model.

2. DSC functions will not operate on the radio until your user MMSID has been entered. See Section

7.9 for details.

3. The radio channels installed into the radio may vary from country to country, depending upon

the model, and government or national communications authority regulations.

4. Brunswick New Technologies Inc. recommends that you check the radio operating licensing

requirements of your country before using the radio. The operator is solely responsible for

observing proper radio installation and usage practices.

5. A DSC warning label is supplied with the 721US. To comply with FCC regulations, this label must

be aﬃxed in a location that is clearly visible from the operating controls of this radio. Make sure

that the chosen location is clean and dry before applying this label.

Optional Handset

This manual describes the operation and installation procedures for the Northstar Explorer 721US and

721EU base unit and microphone. An optional Northstar 701US or 701EU handset can be purchased

and installed to give second station operation and intercom facilities.

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Section 1 - General Information

1-1 Features

Congratulations on your purchase of a Northstar VHF Explorer 721US or 721EU marine band radio. Both

of these models provide the following useful features:

•

Prominent channel display and rotary channel selector knob with PRESS TO ENTER function

Local/Distance mode to eliminate noise in high traffic areas

Adjustable contrast settings for the LCD

Adjustable keypad backlighting for easy night-time use

Waterproof and submersible to comply with JIS-7

GPS latitude and longitude (LL) and time display (when connected to a GPS)

Info key to display barometric data and temperature, or Signal-to-Noise Ratio (SNR)

Happy Fish symbol that indicates the fishing conditions

Choice of High or Low (25 W or 1 W) transmission power

Top centered PTT button for comfortable left- or right-handed use

Powerful 4 W external audio output

Access to all currently-available marine VHF channel banks (USA, Canada, International) including

weather channels where available

•

Special CH16 or CH16/9 key for quick access to the priority (international distress) channel

Special 3CH key to select your three favorite channels

PSCAN (similar to dual watch) facility

DSC (Digital Select Calling) capability that meets USCG SC101 for USA, Class D Standards for

EU/Canada Commercial, and Recreational Class S for Canada

•

Distress call key to automatically transmit the MMSID and position until an acknowledgement is

received

•

Easy access to a buddy list of up to 20 favorite people

MMSID storage for three favorite groups

Group call and All Ships call facility

LL position polling information and Track Your Buddy facility

Weather alert facility. 721US only

ATIS facility for inland waterways. 721EU only

Alphanumeric microphone for easy, direct channel entry and information editing. 721EU only

Useful INTERCOM facility if the optional 701US or 701EU handset is installed.

1-2 Customize your Northstar VHF Radio

You can customize the radio to suit your individual preferences. Some preferences can be set directly through

the keys as explained in this section.

Other preferences are set up through the built-in menus and these are explained in the other sections.

1-3 How to Display and Navigate Menus

1. Hold down CALL/MENU to show the radio menu

Press CALL/MENU to show the DSC call menu.

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2. Only four menu items can be displayed at any one time on the LCD. Press CH + or CH - to scroll up

and down the menu until the cursor is positioned at the desired option. Press ENT or push the rotary

knob to display that option.

3. Make any entries or changes as explained in the following section.

4. Press ENT or push the rotary knob to confirm changes. Otherwise, press ESC to keep the original entry.

5. Press ESC to backup one screen or exit. Any changes are active as soon as you exit the screen.

1-4 How to Enter or Change Alphanumeric Data

If your radio doesn’t have an optional alphanumeric microphone, use the + CH - key to enter

alphanumeric data as follows:

•

Press CH - to count through numbers, or hold down to scroll rapidly to the desired number.

Press CH + to step through the alphabet, or hold down to scroll rapidly to the desired character.

If you make an error, press CH - until < is displayed, then press ENT or push the rotary knob to

backup and correct the entry.

If your radio has an alphanumeric microphone, use the keypad to enter the cahnngel numbers and

names. Each key has the functionality shown below.

•

Use CLR to backup and ENT to confirm, or just wait for the cursor to advance automatically to the

next position when entering data (similar to mobile phone operation),

KEY

Normal and

Menu Mode

Edit Mode

Push 1

Push 2

Push 3

Push 4

Push 5

Space

“

(

)

“

1-5 LCD Symbols and Meanings

The simulation shows the locations of all the following information symbols on the LCD displays.

Base unit display

Optional handset display

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These symbols may not appear at all or may be shown in a different location on the optional handset.

Symbol

Meaning

Transmitting.

HI LO

Transmission power. High (HI) 25 W or Low (LO) 1 W.

Weather channel.

WX ALT

BUSY

PRI

Weather Alert. Alarm beeps will sound. 721US only.

Receiver busy with an incoming signal.

Priority channel is selected.

Duplex operation. Otherwise, blank for Simplex operation.

LOCAL

DSC

Local calling is selected. Otherwise, blank for distance calling.

DSC capability is available.

Indicates an incoming DSC call, or blinks to notify you of any unread Call Log

messages

Low Battery warning (activates at 10.5 V)

Channel selected.

USA INT CAN

Selected channel bank for VHF radio operations and regulations.

Channel is temporarily deleted from the ALL SCAN operation.

Channel suﬃx, if applicable.

B A

CH1 CH2 CH3

Shows which of the 3 favorite channels, if any, are selected.

Otherwise blank.

ATIS

DSC

ACK

Enabled for use in European inland waterways. Otherwise blank. 721EU only.

DSC capability is available.

A message acknowledging your DSC call is being displayed.

Happy Fish symbol with one to four indicator bars to show the probability of good

ﬁshing at your current location, based upon barometric pressure and air tempera-

ture. Four bars show that good ﬁshing is likely. High pressure trends are associated

with stable conditions and calm seas. Research indicates that best ﬁshing occurs

when barometric pressure is rising and between 1010 and 1022 mb. During these

opportune conditions, most ﬁsh are thought to feed anywhere within the water

column. However, low pressure trends bring stormy seas and aﬀect air bladders,

and these conditions make ﬁsh move to deeper levels and become less active.

Local weather forecast based on the local temperature and stored barometric pres-

sure data. The icons are indicative only and are more accurate close to land rather

than in open sea.

Digital Readout of the current barometric pressure (in mb or in/Hg) or the current

temperature (in ºC or ºF), depending upon your selection.

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Baro Graph. A histogram of barometric pressure readings over the past 24 hours.

The high-resolution histogram centers automatically if the range goes oﬀ scale.

Readouts are taken even when the engine and radio have been powered down

(with typically less than 3mA of current drain).

A typical operational display on base unit LCD:

A transmission on Channel 16 is being

made at high power using the International

channel bank.

Channel 16 is set as the Priority channel.

There is an incoming DSC DISTRESS call so

the receiver is busy.

The latitude and longitude of the vessel

and UTC time are shown.

3 bars by the Happy Fish indicates rising

barometic trends and reasonable fishing

conditions.

The weather indicates showery conditions.

A typical operational display on Optional Handset LCD:

1-6 How the Microphone and Optional Handset Work Together

If you have the optional handset installed, as well as the microphone:

•

neither item works when both are ON hook, but you can hear the audio from the handset

speaker and adjust the handset volume.

•

to use one item when it’s OFF hook, the other item must be ON hook.

if both items are OFF hook, only the microphone works.

in Intercom mode ONLY, both items work OFF hook.

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1-7 Basic Operation and Key Functions

All possible keys on the base unit, the microphone, and the optional handset are listed and their functions

are explained.

NOTE: Some keys or functions may not be available on your particular model of base unit, microphone, or optional

handset. This example shows the 721US base unit.

Explorer 721

Key

Function

VOL PWR

Volume and Power. Turn clockwise to power on. Continue to turn until a comfortable

volume is reached. VOL/PWR will also adjust the settings of an external speaker, if

connected.

SQL

Squelch or Threshold Level. Sets the threshold level for the minimum receiver

signal. Turn fully counterclockwise until random noise is heard, then turn slowly

clockwise until the random noise disappears. Make another 1/4 turn clockwise for

best reception in open sea conditions.

In areas of high noise (eg close to large cities) reception may improve if sensitivity

is reduced. Either turn SQL slowly clockwise or use the LOCAL setting. See section

2.4.

DISTRESS

16/9

Send DSC Distress Call. See Section 6.

Priority Channel. 721US only. Press to cancel all other modes and to tune into the

priority channel. Press again to return to your original channel.

The default is Channel 16.To make Channel 09 the priority channel, hold down 16/9

until a beep sounds and 09 is displayed.

Priority Channel. 721EU only. Press to cancel all other modes and to tune into the

priority channel, Channel 16, on high power. Press again to return to your original

channel.

3 CH

Three Favorite Channels. Press to toggle between your favorite channels. The

CH1, CH2, or CH3 symbol appears on the LCD to show which favorite channel is

selected.

To scan only one of your favorite channels, press 3CH then immediately press and

release SCAN. If you want to scan all three favorite channels, press 3CH then im-

mediately press and hold SCAN.

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To add a favorite channel for the ﬁrst time, select that channel then hold 3CH to store

it in the CH1 location. Repeat the procedure to store two more favorite channels in

the CH2 and CH3 locations respectively.

If you try and add another favorite channel it will overwrite the existing CH3. CH1

and CH2 remain unless you delete them.

To delete a favorite channel, select that channel then hold down 3CH until the CH1,

CH2 or CH3 symbol disappears oﬀ the LCD.

SCAN

Scan. Scanning is not allowed in some European countries. Otherwise, press to

scan between your current channel and the priority channel in DUAL or TRI WATCH

mode. The weather channel is also scanned if the USA channel bank is selected and

the weather alert mode is ON.

Hold down SCAN to enter ALL SCAN mode where the priority channel is checked

every 1.5 seconds.

When a signal is received, scanning stops at that channel and BUSY appears on the

LCD. If the signal stops for more than 5 seconds, the scan restarts.

Press ENT or push the rotary knob to temporarily skip over (lock out) an“always busy”

channel when in ALL SCAN mode and resume the scan. An X is shown on the LCD

to designate a skipped channel. It’s not possible to skip over the priority channel.

Press SCAN to stop at the curr.ent channel.

CALL/MENU

Radio Menu, DSC Set up Menu, Radio Set up Menu and DSC CALL Menu.

Hold down to show the radio menu (see Section 2) and to access the radio set up

menu (see Section 3) and the DSC set up menu (see Section 4).

Press to enter the DSC call menu and to make DSC calls (see Section 5).

Weather Channel. 721US only. In USA and Canadian waters, press to hear the most

recently selected weather station. The WX symbol is displayed on the LCD.

Press CH + or CH - to change to a diﬀerent weather channel. Press WX again to

return to the most recent channel.

If the weather alert mode is ON and an alert tone of 1050 Hz is broadcast from the

weather station, it’s picked up automatically and the alarm sounds. Press any key

to hear the weather alert voice message.

IC or H/L IC

Intercom. Optional 701US or 701EU handset required. Hold down to enter Intercom mode

on USA models. EU models need just a single press and release.. This disables the radio

receiver except for incoming DSC calls and the intercom calls the other unit.

Press PTT when invited. When you’re ﬁnished, press ESC to exit Intercom mode or

put the handset back on hook.

ESC

Escape. Use ESC when navigating menus, to clear incorrect entries, to exit from a

menu without saving changes, and to back up to the previous screen.

Rotary knob

Channel Select. Turn to select a channel. The current channel is shown on the LCD

in BIG digits with an A or B designator suﬃx (if applicable) in small letters below the

channel number. (See Appendix C for a listing of channel frequencies.)

Push to activate the ENTER function.

You can also use the rotary knob for alphanumeric entry if you don’t have an alpha-

numeric micrphone. Turn to step through alphanumeric characters one at a time

then push to conﬁrm each selection. If you make an error, select the < character

then push to backup.

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info

H/L

Information. Press on the base MIKE to toggle through the INFO display to show

the barometric historgram, the barometric readout and temperature, or the Signal-

to-Noise Ratio (SNR).

Transmission Power. High (HI) 25 W or Low (LO) 1 W. Press to toggle between high

or low transmission power for the entire channel bank. The HI or LO selection is

shown on the LCD.

Some channels allow only low power transmissions. Error beeps will sound if the

power transmission setting is incorrect.

Some channels allow only low power transmissions initially, but can be changed

to high power by holding down H/L and PTT at the same time. See Appendix C for

a complete listing of channel charts.

+ CH -

Channel Select. Press CH + or CH - to step through the available channels one at a

time, or hold down to scroll rapidly through all the available channels. The current

channel is shown on the LCD in BIG digits with an A or B designator suﬃx (if ap-

plicable) in small letters below the channel number. (See Appendix C for a listing

of channel frequencies.)

Press CH + or CH - to scroll the cursor up and down menu options on the LCD when

navigating menus.

When editing an item containing only numbers, press CH - to step through the

numbers or hold down to scroll rapidly.

To enter a character, press Ch = to step through the alphabet or hold down to scroll

rapidly.

ENT

PTT

Enter. Press ENT when navigating menus, to conﬁrm entries and edits.

Press To Talk. Press PTT to transmit at any time on an allowable channel. This auto-

matically exits you from menu mode and stops scanning.

You must release PTT to receive a signal.

If PTT sticks, a built-in timer will automatically shut down a transmission after ﬁve

minutes and sound the error beeps. This timer is required by FCC regulations.

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Section 2 - The Radio Menu (MENU)

Hold down CALL/MENU to show the radio menu options.

Sections 1-3 and 1-4 explain how to navigate around the menu and enter, save and change data.

2-1 The Radio Menu Options (MENU)

Show weather, SNR or Happy Fish information on the handset.

See Section 2-2.

INFO DATA (Handset only)

BUDDY LIST

LOCAL/DIST

Maintain your buddy list.

Set radio sensitivity.

See Section 2-3.

See Section 2-4.

BACKLIGHT

CONTRAST

Set backlight level.

Set contrast level.

See Section 2-5.

Set position & UTC manually.

See Section 2-6.

GPS/DATA

DSC SETUP

MANUAL

SETTING

Set local time and time format.

See Section 2-6.

USER MMSID

GROUP SETUP

INDIV REPLY

DSC FUNC

DSC SETUP Menu.

See Section 4.

ATIS MMSID

ATIS FUNC (EU only)

LL REPLY

UIC (721US only)

CH NAME

RADIO SETUP

RADIO SETUP Menu.

See Section 3.

RING VOLUME

KEY BEEP

INT SPEAKER

WATCH MODE

WX ALERT (721US only)

COM PORT

BARO SENSOR

TEMPERATURE

HAPPY FISH

Reset factory settings.

GPS SIM

Turn the GPS Simulator on/oﬀ.

See Section 2.8.

RESET (Base unit only)

See Section 2.7.

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2-2 Show Weather, SNR or Happy Fish on Handset (INFO DATA)

If you have the optional handset installed, you can use INFO DATA to show the local weather forecast

(e.g. SUNNY) and a digital readout of the current barometric pressure (mb or in-Hg) and the channel

name on the handset LCD.

MENU SELECT

>INFO DATA

BUDDY LIST

LOCAL/DIST

INFO DATA

DISTRESS

>ON

OFF

A BIT CLOUDY

78.4°F

29.99in-Hg

After INFO DATA is selected ON, the following screen appears on the handset with Line #3 able to display 3

items of interest - temperature, Signal To Noise ratio (SNR) or HAPPY FISH quality.

•

a digital readout of the current air temperature (°F or °C)

the current Signal-to-Noise Ratio (SNR)

the Happy Fish symbol with indicator bars.

1. Hold down CALL/MENU to display the radio menu.

2. The cursor is at INFO DATA. Press ENT then select INFO ON to display the information on the handset

LCD, instead of the time and GPS position.

3. 78.4°F is replaced by SNR bars if handset is OFF HOOK.

4. Happy Fish symbol replaces TEMP/SNR if triggered after which it times out.

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2-3 Maintain Your Buddy List (BUDDY LIST)

Use the Buddy List to store the names and associated MMSIDs of 20 favorite people.

MENU SELECT

>BUDDY LIST

LOCAL/DIST

BACKLIGHT

Names are stored in the order of entry, with the most recent entry shown ﬁrst.

The following sections show to use BUDDY LIST to add, edit, and delete entries in

your buddy list.

Section 3 explains how to call a buddy.

2-3-1 Add an Entry

BUDDY LIST

> MANUAL NEW

ALEX

ENTER NAME

––––––––––––

ENTER MMSID

–––––––––

ENTER NAME

BOB

123456789

> STORE

CANCEL

ENTER MMSID

123456789

TOM

1. Select BUDDY LIST. The cursor is at MANUAL NEW. Press ENT.

2. Enter the buddy name, one character at a time (this may be alphanumeric) then press ENT or push

the rotary knob repeatedly until the cursor moves to the MMSID entry line.

3. Enter the MMSID (this must be numeric) associated with that buddy name then press ENT.

4. The new buddy name and MMSID are displayed. Press ENT or push the rotary knob to store the new

entry, which is displayed at the top of your buddy list.

NOTE: When the BUDDY LIST is full (20 entries), you can’t make a new entry until you have deleted an existing

entry.

2-3-2 Edit an Entry

BUDDY LIST

> MANUAL NEW

ALEX

EDIT NAME

ALEX

> EDIT

111223344

> STORE

CANCEL

DELETE

EDIT MMSID

112233445

TOM

1. Select BUDDY LIST. Press ENT or push the rotary knob to display the list of entries.

2. Scroll down (if required) to the incorrect entry and press ENT.

3. Select EDIT. The cursor is at the first character of the name.

4. Edit the buddy name or, to edit only the MMSID, press ENT or push the rotary knob repeatedly until

the cursor moves to the MMSID line.

5. When you are finished, press ENT or push the rotary knob (repeatedly if necessary) to display the

next screen.

6. Press ENT or push the rotary knob to store the changes. The buddy list is displayed again. If more

changes are required, repeat Steps 2 thru 6. Otherwise, press ESC to exit.

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2-3-3 Delete an Entry

BUDDY LIST

> MANUAL NEW

ALEX

BUDDY LIST

> MANUAL NEW

ALEX

TOM

> EDIT

DELETE

DELETE BUDDY

TOM

> YES

TOM

1. Select BUDDY LIST. Press ENT or push the rotary knob to display the list of entries.

2. Scroll down (if required) to the entry you want to delete and press ENT.

3. Select DELETE then select YES.

4. The entry is deleted immediately and the buddy list is displayed again.

2-4 Local or Distance Sensitivity (LOCAL/DIST)

Use LOCAL/DIST to improve the sensitivity of the receiver either locally (LOCAL) or

MENU SELECT

INFO DATA

over distances (DIST).

LOCAL is NOT recommended for use in open sea conditions. It’s designed for use

in areas of high radio noise; e.g. when you’re close to a city.

BUDDY LIST

> LOCAL/DIST

See also SQL (Squelch Control) in Section 1.6.

2-4-1 Set Distance Sensitivity

1. Select LOCAL/DIST then select DIST.

SENSITIVITY

> DISTANT

LOCAL

2. Press ENT or push the rotary knob to activate the DIST setting. This disables

local sensitivity and the menu is displayed again.

2-4-2 Set Local Sensitivity

1. Select LOCAL/DIST then scroll to LOCAL.

SENSITIVITY

DISTANT

2. Press ENT or push the rotary knob to activate the LOCAL setting. This disables

distance sensitivity and the menu is displayed again.

> LOCAL

LOCAL is displayed on the LCD in reverse video, as a reminder that local sensitivity is selected.

2-5 Backlighting (BACKLIGHT) and Contrast (CONTRAST)

Use BACKLIGHT to set the backlight levels for the LCD at a comfortable level.

MENU SELECT

The microphone keypad backlighting is either ON or OFF.

LOCAL/DIST

The DISTRESS key backlighting can’t be switched oﬀ.

> BACKLIGHT

CONTRAST

Use CONTRAST to set the contrast level for the LCD.

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2-5-1 Set the Backlighting Level

1. Select BACKLIGHT.

BACKLIGHT

2. Use CH + or CH - to select a comfortable backlight level.

LO HI

PRESS ENT

3. Press ENT or push the rotary knob to conﬁrm the new level and return to the

menu.

2-5-2 Set the Contrast Level

1. Select CONTRAST.

2. Use CH + or CH - to select a comfortable contrast level.

CONTRAST

3. Press ENT or push the rotary knob to conﬁrm the new level and return to the

menu.

LO HI

PRESS ENT

2-6 GPS Data and Time (GPS/DATA)

If your vessel has an operational GPS navigation receiver, the radio automatically

detects and updates the vessel position and the local time.

MENU SELECT

BACKLIGHT

CONTRAST

However, if the GPS navigation receiver is disconnected or absent, you can specify

the vessel position and the local time manually, using the GPS/DATA option.

> GPS/DATA

This information is important because it will be used if you transmit a DSC distress call.

2-6-1 Manually Enter Position and UTC Time (MANUAL)

NOTE: This function is available only when an operational GPS receiver is NOT connected.

GPS/DATA

> MANUAL

SETTING

MANUAL LL

––’––’––––N

––’––’––––W

MAN ––:––UTC

1. Select GPS/DATA, then MANUAL.

2. Enter the latitude, then the longitude, then the UTC.

3. Press ENT or push the rotary knob when all the information is correct.

The vessel’s latitude and longitude are shown on the screen, with the UTC time. After entering your

manual LL position, the preﬁx“M”in the normal GPS screen indicates a manual entry. The manual entries

are cancelled if a real GPS position is received.

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2-6-2 Local Time (TIME OFFSET)

The local time can be set by entering the time oﬀset between UTC and local time as follows.

GPS/DATA

MANUAL

>SETTING

GPS/DATA

TIME OFFSET

>+01:30

> TIME OFFSET

TIME FORMAT

TIME DISPLY

02:30PM LOC

1. Select GPS/DATA, then SETTING.

2. Select TIME OFFSET to enter the diﬀerence between UTC and local time. Half hour increments can be

used with a maximum oﬀset of 13 hours.

In this example, a diﬀerence of +1.5 hours has been entered and the local time is displayed with the

suﬃx LOC.

LM Y

M Y

‡

E^*

†

F^*

M^*

Standard Time = Universal Time + value from table

STANDARD TIME ZONES

+ 1

+ 2

+ 3

Corrected to January 2005

E* + 5 30

M†

+10

+10 30

+11

+11 30

+12

+13

- 1

- 2

- 3

- 3 30

- 4

- 5

- 7

- 8

- 8 30

- 9

- 9 30

-10

-11

Zone boundaries are approximate

+ 6

+ 6 30

+ 7

+ 8

Daylight Saving Time (Summer Time),

usually one hour in advance of Standard

Time, is kept in some places

C* + 3 30

+ 4

D* + 4 30

+ 5

+ 9

+ 9 30

+14

- 6

Map outline © Mountain High Maps

Compiled by HM Nautical Almanac Office

‡

-12

‡

No Standard Time legally adopted

180°

120°W

90°W

150°E

150°W

60°W

30°W

0°

30°E

60°E

90°E

120°E

180°

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2-6-3 Time Format Options (TIME FORMAT)

Time can be shown in 12 or 24 hour format.

GPS/DATA

MANUAL

> SETTING

SETTING

TIME OFFSET

TIME FORMAT

> 12 Hr

> TIME FORMAT

TIME DISPLAY

24 Hr

07:15AM LOC

1. Select GPS/DATA, then SETTING.

2. Select TIME FORMAT.

3. Select 12 Hr or 24 Hr as desired. In this example, 12 hour format has been selected so the LCD shows

the AM or PM suffix.

2-6-4 Time Display Options (TIME DISPLAY)

If you’ve entered the time manually as described in the previous sections, the time is shown ALWAYS with

the preﬁx M.

However, if the vessel’s position is being updated through a GPS navigation receiver, you can switch the time

display ON or OFF as follows:

1. Select GPS/DATA, then SETTING.

GPS/DATA

TIME OFFSET

TIME DISPLY

2. Select TIME DISPLY.

TIME FORMAT

> TIME DISPLY

> OFF

3. Select ON or OFF as desired. In this example,

OFF has been selected and so the LCD no

longer shows the time.

If the time display is set ON, course and speed data are NOT displayed on the LCD (see

section 2-5-6).

2-6-5 Position Display Options (LL display)

If you’ve entered the vessel position manually as described in the previous section, the vessel position is

shown ALWAYS with the suﬃx M.

However, if the time is being updated through a GPS navigation receiver, you can switch the vessel position

display ON or OFF as follows:

1. Select GPS/DATA, then SETTING.

GPS/DATA

TIME FORMAT

LL DISPLAY

2. Select LL DISPLAY.

3. Select ON or OFF as desired. In this example,

OFF has been selected and the screen no

longer shows the vessel position.

TIME DISPLY

> OFF

> LL DISPLAY

2-6-6 Course & Speed Display Options (COG/SOG)

Use this option to display course over ground (COG) and speed over ground (SOG) data on the screen.

1. Select GPS/DATA, then SETTING.

GPS/DATA

TIME DISPLY

COG/SOG

> ON

2. Select COG/SOG.

3. Select ON or OFF as desired. In this example,

ON has been selected, so the screen shows the

bearing and speed.

LL DISPLY

OFF

> COG/SOG

If COG/SOG is set ON, the time is NOT displayed on the screen (see section 2-5-4).

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2-6-7 GPS Alert Options (ALERT)

The GPS alert is usually set to ON so that if the GPS navigation receiver is disconnected, the alarm sounds.

1. Select GPS/DATA, then SETTING.

GPS/DATA

LL DISPLY

GPS ALERT

> ON

2. Select GPS ALERT.

3. Select ON or OFF as desired.

COG/SOG

OFF

> GPS ALERT

2-7 GPS Simulator (GPS SIM)

The GPS Simulator is set to OFF whenever the radio is turned ON or whenever real GPS data is available through

the COM port. However, if you want to test the GPS Simulator, turn it ON as follows:

1. Select GPS SIM, then select ON or OFF as desired.

MENU SELECT

Whenever the GPS Simulator is turned ON, simulated Speed Over Ground

(SOG), Course Over Ground (COG), and LL position appear on the screen. This

data is updated automatically during the simulation.

DSC SETUP

RADIO SETUP

> GPS SIM

IMPORTANT: It’s not possible to send a DSC transmission when you’re in GPS Simulator mode.

2-8 Reset to Factory Defaults (RESET)

Use RESET to return every setting to the factory defaults EXCEPT all MMSID settings and the entries in your

buddy list.

MENU SELECT

RADIO SETUP

GPS SIM

RESET RADIO

ARE YOU SURE

> YES

> RESET

1. Select RESET. The radio asks for confirmation.

2. Select YES to reset the radio and return to the menu.

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Section 3 - Radio Setup Menu (RADIO SETUP)

Hold down CALL/MENU then scroll down and select RADIO SETUP. Press ENT or push the rotary knob to show

the RADIO SETUP menu options.

Sections 1-3 and 1-4 explain how to navigate around the menu and enter, save and change data.

3-1 The Radio Setup Menu Options (RADIO SETUP)

Select the channel bank (721US only)

UIC (721US only)

See Section 3-2.

Edit or delete channel names.

CH NAME

See Section 3-3.

Set the volume level of the incoming call notiﬁcation beeps.

See Section 3-4.

RING VOLUME

KEY BEEP

Set the volume level of the beeps.

See Section 3-4.

Turn the radio’s internal speakers ON or OFF.

See Section 3-5.

INT SPEAKER

WATCH MODE

Select Dual or Tri watch scanning.

See Section 3-6.

Turn the WX Alert scanning mode ON or OFF. (721US only)

See Section 3-7.

WX ALERT (721US only)

Select NMEA or NAVBUS protocol for communications between the radio and any

other instruments.

COM PORT

See Section 3-8.

Select the barometric units, calibrate the sensor, turn the display ON or OFF.

See Section 3-9.

BARO SENSOR

TEMPERATURE

HAPPY FISH

Select the temperature units, calibrate the sensor.

See Section 3-10.

Select the HAPPY FISH alarm to be ON or OFF.

See Section 3-11.

3-2 Select the Channel Bank (UIC)

721US only.

There is a choice of three channel banks; USA, International, or Canadian (see Appendix C for details).

1. Select RADIO SETUP.

2. The cursor is at UIC. Press ENT or push the rotary

RADIO SETUP

> UIC

UIC

> USA

knob to display the list of channel banks.

3. Select the channel bank to use then press ENT

or push the rotary knob to conﬁrm the setting

and return to the menu.

CH NAME

INT’L

RING VOLUME

CANADA

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3-3 Change Channel Names (CH NAME)

The channel charts are listed in Appendix C with their default name tags. CH NAME gives you the option

to edit or delete the channel name tags displayed on the screen.

RADIO SETUP

> CH NAME

TELEPHONE

> EDIT

CH NAME

TELEPHONE

RING VOLUME

DELETE

KEY BEEP

EDIT CH NAME

TELEPHONE

SAVE CH NAME

PHONE1

> YES

1. Select RADIO SETUP, then CH NAME.

2. Use CH + or CH - to step through the channels with their names until you see the channel name you

want to change, then press ENT or push the rotary knob. In this example, the channel name TELEPHONE

associated with channel 01 is being changed to PHONE1.

3. Select EDIT and press ENT or push the rotary knob to edit the existing name tag. Enter the new name

over the existing name. It can be a maximum of 12 characters.

To delete the channel name, just select DELETE then press ENT or push the rotary knob.

4. Press ENT or push the rotary knob (repeatedly if necessary) to display the YES/NO conﬁrmation.

5. Press ENT or push the rotary knob to conﬁrm the new channel name tag or the deletion, then press

ESC to return to the menu.

3-4 Ring and Beep Volume (RING VOLUME) and (KEY BEEP)

Set the volume level of the incoming signal beeps (RING VOLUME) and/or the error and warning beeps (KEY

BEEP) as follows:

RADIO SETUP

> CH NAME

RING VOLUME

> HIGH

KEY BEEP

> HIGH

LOW

RING VOLUME

KEY BEEP

LOW

OFF

1. Select RADIO SETUP, then RING VOLUME or KEY BEEP as appropriate.

2. Select a HIGH or LOW volume. (You can turn the beeps oﬀ completely by selecting KEY BEEP then

OFF.)

3. Press ENT or push the rotary knob to conﬁrm the new volume setting and return to the menu.

3-5 Internal Speaker Connections (INT SPEAKER)

Switch the radio’s internal speaker ON or OFF. (The external speaker is always ON if a speaker is plugged into

the external speaker jack.)

1. Select RADIO SETUP, then INT SPEAKER.

RADIO SETUP

RING VOLUME

INT SPEAKER

> ON

2. Select ON or OFF then press ENT or push the

rotary knob to conﬁrm the setting and return

to the menu.

KEY BEEP

OFF

> INT SPEAKER

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3-6 Set the Priority Channel (WATCH MODE)

If you have the 721EU, watch mode is similar to a dual watch, scanning between the priority channel and the

working channel. CH16 is the priority channel.

If you have the 721US and are operating on USA or Canadian channel banks, you can set the priority channel

to cover both CH16 and CH09 as well as the working channel, as follows:

1. Select RADIO SETUP, then WATCH MODE.

RADIO SETUP

KEY BEEP

WATCH MODE

> ONLY 16CH

16CH+9CH

2. Select ONLY 16CH for dual watch mode, or

16CH+9CH for tri watch mode.

INT SPEAKER

> WATCH MODE

3-7 Weather Alert (WX ALERT)

721US only.

The NOAA provides several weather forecast channels on USA and Canadian channel banks. If severe weather

such as storms or hurricanes are forecast, the NOAA broadcasts a weather alert on 1050 Hz. You can set up

the radio to pick up weather alerts, as follows:

1. Select RADIO SETUP, then WX ALERT.

2. Select ON then press ENT or push the rotary

knob to conﬁrm the setting and return to the

RADIO SETUP

INT SPEAKER

WATCH MODE

> WX ALERT

WX ALERT

menu. (If you select OFF, the alarm won’t sound

when there’s a weather alert.)

> OFF

3. When a weather alert is broadcast, the alarm

will sound. Press any key to hear the weather

alert voice message.

3-8 NMEA or NAVBUS protocol (COM PORT)

You can add the radio to a group of instruments using NMEA or NAVBUS protocol.

NAVBUS is automatically activated when present, so that data such as barometric pressure and history,

temperature, DSC polling positions and distress data are available to any other Northstar instruments using

NAVBUS. However, the barometric and temperature readings from the radio can be turned OFF if you prefer

to use the readings from a diﬀerent instrument.

Select your GPS data source to come from either NMEA or NAVBUS as follows:

3-8-1 NMEA GPS data source (GPS SOURCE)

RADIO SETUP

WATCH MODE

COM PORT

NMEA

GPS SOURCE

> NMEA

GPS SOURCE

NMEA

WX ALERT

> GPS SOURCE

BARO & TEMP

NAVBUS

> ON

> COM PORT

OFF

1. Select RADIO SETUP, then COM PORT.

2. Select GPS source, then select NMEA.

NMEA

CHECKSUM

> ON

3. The cursor is at ON. Press ENT or push the

rotary knob to conﬁrm the setting and show

the CHECKSUM option.

OFF

4. CHECKSUM ON is the usual setting. The cursor is at ON. Press ENT or push the rotary knob to conﬁrm

the setting and return to the menu.

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3-8-2 NAVMAN GPS data source (GPS SOURCE)

RADIO SETUP

WATCH MODE

COM PORT

NMEA

GPS SOURCE

NMEA

GPS SOURCE

NAVBUS

> ON

WX ALERT

> GPS SOURCE

BARO & TEMP

> NAVBUS

> COM PORT

OFF

1. Select RADIO SETUP, then COM PORT.

2. Select GPS source, then select NAVBUS.

3. The cursor is at ON. Press ENT or push the rotary knob to conﬁrm the setting and return to the menu.

3-8-3 Use the 721 as barometric pressure and temperature data source (BARO & TEMP)

RADIO SETUP

WATCH MODE

COM PORT

NMEA

BARO & TEMP

> ON

WX ALERT

GPS SOURCE

> BARO & TEMP

OFF

> COM PORT

1. Select RADIO SETUP, then COM PORT.

2. Select BARO & TEMP.

3. The cursor is at ON. Select ON to have the radio provide the barometric and temperature data to other

instruments connected. Select OFF to have another instrument to act as the source of this data.

3-9 Barometric Displays (BARO SENSOR)

A barometric sensor in the microphone measures air pressure changes, enabling the radio to provide

three useful aids towards weather prediction and fishing conditions, particularly when you’re close to

large land masses. (See the information on the Happy Fish icon in Section 1.5.) The radio can show:

•

a weather icon to indicate five different conditions (SUNNY, PARTLY CLOUDY, CLOUDY, RAINY,

SNOW). The local air pressure trends combined with the local temperature determines which

weather icon is displayed. (NOTE: In open ocean conditions the weather icon can be less

accurate than when close to large land masses.)

•

a digital readout of air pressure (in mb or in/Hg).

a graphical display of barometric pressure changes over the past consecutive 24 hours.

Barometric data is maintained even if the radio is switched off.

NOTE: If the vessel Battery Master is turned OFF, the BARO history is erased.

3-9-1 Set the Barometric Units (BARO UNITS)

RADIO SETUP

WX ALERT

BARO SENSOR

> BARO UNITS

BARO DISPLY

BARO CAL.

BARO UNITS

> MILLIBARS

INCHES

COM PORT

> BARO SENSOR

1. Select RADIO SETUP, then BARO SENSOR.

2. The cursor is at BARO UNITS. Press ENT or press the rotary knob.

3. The cursor is at MILLIBARS. Press ENT or press the rotary knob to show barometric pressure in MILLIBARS

or select INCHES to show barometric pressure in inches of mercury.

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3-9-2 Switch the Barometric Display ON or OFF (BARO DISPLY)

RADIO SETUP

WX ALERT

BARO SENSOR

BARO UNITS

> BARO DISPLY

BARO CAL.

BARO DISPLY

> LCD OFF

LCD ON

COM PORT

> BARO SENSOR

1. Select RADIO SETUP, then BARO SENSOR.

2. Select BARO DISPLY.

3. The cursor is at LCD OFF. Press ENT or press the rotary knob to switch OFF the barometric display on the

base unit, or select LCD ON to show the barometric display on the base unit.

IMPORTANT: LCD OFF is the default. This minimises the current drain of the standby vessel battery to about

3mA average. If the barometric display is set to LCD ON the current drain is continuous at about 85mA.

3-9-3 Calibrate the Barometric Sensor (BARO CAL.)

The barometric functions and icons work best when calibrated to local conditions. The operating range

is from 960mb to 1060mb.

RADIO SETUP

WX ALERT

BARO SENSOR

BARO UNITS

BARO DISPLY

> CAL

CAL

MODIFY?

COM PORT

0.00 In-Hg

PRESS ENT

> BARO SENSOR

1. Select RADIO SETUP, then BARO SENSOR.

2. Select BARO CAL. then change the setting to match the reading on an accurate instrument nearby or

the reading given by a local weather station.

3-10 Temperature Display (TEMPERATURE)

A temperature sensor in the microphone measures air temperature changes.

3-10-1 Set the Temperature Units (UNITS)

RADIO SETUP

COM PORT

TEMPERATURE

> UNITS

CAL.

TEMP SENSOR

> ˚C

˚F

BARO SENSOR

> TEMPERATURE

1. Select RADIO SETUP, then TEMPERATURE

2. The cursor is at UNITS. Press ENT or press the rotary knob.

3. The cursor is at ºC. Press ENT or press the rotary knob to display the temperature in ºC (Celsius) or select

ºF to show the temperature in Fahrenheit.

3-10-2 Calibrate the Temperature Reading (CAL.)

The temperature sensor works best when calibrated to local conditions.

RADIO SETUP

COM PORT

TEMPERATURE

> UNITS

CAL.

CAL

MODIFY?

BARO SENSOR

> TEMPERATURE

0.00 In-Hg

PRESS ENT

1. Select RADIO SETUP, then TEMPERATURE.

2. Select CAL. then change the setting to match the reading on an accurate instrument nearby or the

reading given by a local weather station.

Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual

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Section 4 - DSC SETUP Menu

A valid user MMSID must be entered to access the DSC functions. If you don’t have a user MMSID, see

Appendix D.

Hold down CALL/MENU then scroll down and select DSC SETUP. Press ENT or push the rotary knob

to show the following DSC SETUP menu options.

Sections 1.3 and 1.4 explain how to navigate around the menu and enter, save and change data.

4-1 DSC SETUP Menu Options

Check your user MMSID. See section 4.2. To enter your user MMSID for the ﬁrst time,

see Section 7-9.

USER MMSID

Enter or change the name and/or details of a group.

See section 4.3.

GROUP SETUP

Choose an automatic or manual response to calls (721US only).

See section 4.4.

INDIV REPLY

Enter or change your ATIS MMSID (721EU only).

See section 4.5.

ATIS MMSID

Enable/disable the ATIS function (VHF 721EU).

See section 4.5.

ATIS FUNC

Turn the DSC operation ON or OFF.

See section 4.6.

DSC FUNC

Select the type of response to an LL polling request.

See section 4.7.

LL REPLY

4-2 Check Your User MMSID (USER MMSID)

You can display and read your user MMSID at any time.

1. Select DSC SETUP.

2. The cursor is at USER MMSID. Press ENT or push the rotary knob.

3. The LCD shows your user name and MMSID.

4-3 Maintain Your Groups (GROUP SETUP)

Use GROUP SETUP to create, edit, or delete 1, 2, or 3 groups of frequently called people stored in alphanumeric

order. A group MMSID always starts with 0.

4-3-1 Create a Group (GROUP SETUP)

1. Select DSC SETUP, then GROUP SETUP.

2. If this is the FIRST TIME that you’re entering a group name, a line of nine zeros appears. Otherwise, any

existing group names are displayed. Press ENT or push the rotary knob to display the input screen.

3. Enter the group name along the dashed line. The group name can be alphanumeric. Press ENT or push

the rotary knob to conﬁrm each correct entry and to move to the next digit. When you are ﬁnished,

press ENT or push the rotary knob repeatedly until the cursor moves to the MMSID line.

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DSC SETUP

USER MMSID

GROUP SETUP

> MANUAL NEW

000000000

GROUP NAME

––––––––––––

GROUP MMSID

0––––––––

FISHER1

012345678

> STORE

CANCEL

> GROUP SETUP

INDIV REPLY

If you make an error, select < and press ENT to backup and correct the entry (721US) or CLR and ENT

(721EU).

4. Enter the group MMSID. The ﬁrst number is always 0. Press ENT or push the rotary knob to conﬁrm the

entry.

5. The group name and group MMSID are shown in a conﬁrmation screen. Press ENT or push the rotary

knob to store the details and return to the GROUP SETUP screen.

4-3-2 Edit Group Name or Group MMSID

GROUP SETUP

MANUAL NEW

FISHER1

> EDIT

EDIT NAME

> FISHER1

FISHER2

012345678

> STORE

CANCEL

> FISHER1

FRIENDS1

DELETE

EDIT MMSID

012345678

1. Select DSC SETUP, then GROUP SETUP. The existing group names are displayed. Select the group name

that you want to edit.

2. The cursor is at EDIT. Press ENT or push the rotary knob to show the group name details. The cursor is

at the ﬁrst character of the group name.

3. Edit the new name or, to edit only the MMSID, press ENT or push the rotary knob repeatedly until the

cursor moves to the MMSID line.

4. When you are ﬁnished, press ENT or push the rotary knob (repeatedly if necessary) to display the next

screen.

5. Press ENT or push the rotary knob to store the changes and return to the GROUP SETUP screen.

4-3-3 Delete a Group

GROUP SETUP

MANUAL NEW

FISHER2

EDIT

DELETE GROUP

FISHER2

> YES

> FISHER2

FRIENDS1

> DELETE

1. Select DSC SETUP, then GROUP SETUP.

2. Select the group that you want to delete.

3. Select DELETE and press ENT or press the rotary knob. The radio asks for conﬁrmation.

4. Press ENT or push the rotary knob to delete the group and return to the GROUP SETUP screen.

4-4 Response to Individual Calls (INDIV REPLY)

721US only.

You can respond to incoming individual calls with an automatic response or with a manual response.

An automatic response sends an acknowledgement then sets the request link channel, ready for a

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conversation.

A manual response asks if you want to acknowledge the call, and then asks if you want to converse with

the caller.

1. Select DSC SETUP, then select INDIV REPLY.

DSC SETUP

USER MMSID

INDIV REPLY

> AUTO

2. The cursor is at AUTO. Press ENT or press the

rotary knob for an automatic response, or select

MANUAL for a manual response.

GROUP SETUP

> INDIV REPLY

MANUAL

4-5 ATIS MMSID & ATIS Functionality

721EU only.

You MUST enter your ATIS MMSID to access ATIS functionality if you are navigating inland waterways within

Europe. ATIS sends a digital message anytime that you release the PTT key. Inland waterways rules require

1 W Tx power on Channels 06, 08, 10, 11, 12, 13, 14, 15, 17, 71, 72, 74, and 77.

4-5-1 Enter or Edit Your ATIS MMSID

DSC SETUP

GROUP SETUP

INPUT ATIS

MMSID

INPUT ATIS

MMSID

INPUT AGAIN

ATIS MMSID

9––––––––

INDIV REPLY

9––––––––

> STORE

CANCEL

> ATIS MMSID

ATIS MMSID

923456789

> STORE

CANCEL

To enter or edit your ATIS MMSID:

1. Select DSC SETUP, then ATIS MMSID.

2. If this is the FIRST TIME that you are entering your ATIS MMSID, a dashed line appears. Enter your ATIS

MMSID along the dashed line. An ATIS MMSID always starts with the number 9. Press ENT or push the

rotary knob to conﬁrm each correct entry and to move to the next digit.

If you make an error, press CH - until < appears, then press ENT or push the rotary knob to backup and

correct the entry.

If you’re editing an existing ATIS MMSID, this will be displayed. Make the required changes.

3. Press ENT or push the rotary knob to store your ATIS MMSID.

4. Enter your ATIS MMSID again as a password check, then press ENT or push the rotary knob to permanently

store the ATIS MMSID and return to the menu.

You can view your stored ATIS MMSID at anytime by selecting ATIS MMSID in the main menu.

4-5-2 Enable ATIS Functionality (ATIS FUNC)

721EU only.

ATIS functionality will operate only after the ATIS MMSID has been entered (see previous section).

1. Select DSC SETUP, then ATIS FUNC.

2. The cursor is at ON. Select ENT or push the rotary knob to enable the ATIS functionality and automatically

disable DSC functionality. The ATIS annunciator appears on the screen.

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DSC SETUP

INDIV REPLY

ATIS FUNC

> ON

ATIS MMSID

> ATIS FUNC

OFF

It’s not possible to have both ATIS ON and DSC ON simultaneously. When you enable one, the other will turn

OFF. If DSC and ATIS are both OFF, you must turn DSC ON for normal DSC operation.

The annunciator on the LCD shows you the current mode: if the DSC annunciator is shown, DSC is operational;

if the ATIS annunciator is shown, ATIS is operational.

4-6 DSC Functionality (DSC FUNC)

DSC functionality can be disabled but this is not recommended.

DSC SETUP

GROUP SETUP

DSC FUNC

> ON

INDIV REPLY

> DSC FUNC

OFF

1. Select DSC SETUP, then DSC FUNC.

2. The cursor is at ON. Press ENT or push the rotary knob to enable the DSC functionality and automatically

disable ATIS functionality. The DSC annunciator appears on the screen.

It’s not possible to have both ATIS ON and DSC ON simultaneously. When you enable one, the other will turn

OFF. If DSC and ATIS are both OFF, you must turn DSC ON for normal DSC operation.

The annunciator on the LCD shows you the current mode: if the DSC annunciator is shown, DSC is operational;

if the ATIS annunciator is shown, ATIS is operational.

4-7 Response Type to LL Polling Calls (LL REPLY)

You can set up the radio to respond to an LL polling request in one of three ways:

AUTO

MANUAL reply manually or ignore to each incoming LL polling request from your buddies.

OFF ignores all incoming LL polling requests. from your buddies.

automatically replies to an incoming LL polling request from any of your buddies.

1. Select DSC SETUP, then LL REPLY.

DSC SETUP

INDIV REPLY

DSC FUNC

> LL REPLY

LL REPLY

2. Select your mode of response and press ENT or

push the rotary knob to conﬁrm.

> MANUAL

AUTO

OFF

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Section 5 - Send and Receive DSC Calls

A valid user MMSID must have been entered to access the DSC functions. If you don’t have a user

MMSID, see Appendix D.

Press CALL/MENU to show the DSC CALL menu. This shows the different types of DSC call that you

make.

Sections 1.3 and 1.4 explain how to navigate around the menu and enter, save and change data.

5-1 What is DSC?

DSC (Digital Selective Calling) is a semi-automated method of establishing VHF, MF, and HF radio calls. It

has been designated as an international standard by the IMO (International Maritime Organization) and is

part of the GMDSS (Global Maritime Distress and Safety System).

Currently, you are required to monitor Distress Channel 16, but DSC will eventually replace listening watches

on distress frequencies and will be used to broadcast routine and urgent maritime safety information.

DSC enables you to send and receive calls from any vessel or coast station that is equipped with DSC

functionality, and within geographic range. Calls can be categorised as distress, urgency, safety, or routine,

and DSC selects a working channel automatically.

5-2 The DSC CALL Menu Options

Make a routine, safety, urgency or distress call to a

buddy or another individual.

See Section 5-3.

INDIVIDUAL

ROUTINE

SAFETY

URGENCY

DISTRESS

Show the details of the most recent incoming call.

See Section 5-4.

LAST CALL

GROUP

Make a call to one of your three groups.

See Section 5-5.

Make a urgency, safety, routine, or distress call

to All Ships,

See Section 5-6.

ALL SHIPS

URGENCY

SAFETY

ROUTINE

DISTRESS

Show the details of the 20 most recent incoming

calls.

CALL LOG

DIST LOG

See Section 5-7.

Show the details of the 10 most recent distress

calls.

See Section 5-8.

Request the LL position of a buddy.

See Section 5-9.

LL REQUEST

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5-3 Call an Individual (INDIVIDUAL)

INDIVIDUAL

> ROUTINE

ROUTINE

MANUAL MMSID

0––––––––

012345678

INDIVIDUAL

ROUTINE

> MANUAL NEW

BUDDY1

SAFETY

URGENCY

BUDDY2

> SET CHANNEL

012345678

INDIVIDUAL

ROUTINE

12345678

INDIVIDUAL

ROUTINE

012345678

INDIVIDUAL

ROUTINE

INDIV ACK

012345678

PRESS PTT

ESC –> EXIT

> SEND?

CALLING...

WAITING ACK

You can call anyone who has a radio with DSC functionality. You can set the priority level of the DSC call to

routine, safety, urgency, or distress. Choose:

•

ROUTINE to make a routine call

SAFETY to send safety information

URGENCY only when there’s a serious situation or problem that could lead to a distress situation

DISTRESS only when there’s a distress situation.

1. Press CALL/MENU to enter the DSC CALL menu, then select INDIVIDUAL to call another person.

2. The cursor is at ROUTINE. Press ENT or press the rotary knob to make a routine call or select to another

priority level.

3. The cursor is at MANUAL NEW. Press ENT or press the rotary knob to call a person who’s not in your

buddy list; otherwise select the name of your buddy.

If you selected MANUAL NEW, enter the user MMSID and then press ENT or push the rotary knob.

4. Select the working channel and press ENT or press the rotary knob. (NOTE: If you’re making a distress

call, the radio goes to CH16 automatically.) Duplex channels can’t usually be called and are automatically

eliminated from the suggested call list. If the call is to a Coast Station, the radio will recognize this and

select the correct channel.

5. The radio summarizes the call details and asks for conﬁrmation to send the call (SEND?). Press ENT or

push the rotary knob to send the call. The TX annunciator is displayed on the screen while the DSC call

is being sent.

6. If the call is acknowledged (ACK), press PTT to talk. If there’s no reply to a routine call, try again (see

Section 5-3-1).

5-3-1 Retry a Routine Call

1. If there’s no reply to your call after one minute (UNABLE TO ACKNOWLEDGE)

VHF721

the radio asks if you want to retry the call (SEND AGAIN?).

SEND AGAIN?

> YES

2. Select YES and press ENT or push the rotary knob to retry the call. If the call

still can’t be placed, the radio returns to normal operation.

CANCEL

5-3-2 Acknowledge an Individual Incoming Call

The Explorer 721EU requires the operator to manually send an acknowledgement

to the requesting radio. Press ENT or push the rotary knob to send an acknowledge-

ment or press ESC to cancel.

RCV: INDIV

012345678

ENTER –> ACK

ESC –> EXIT

The Explorer 721US automatically sends an acknowledgement to the requesting

radio within 10 seconds of receiving the call.

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5-4 Call the Most Recent Caller (LAST CALL)

DSC CALL

INDIVIDUAL

EXPLORER 721

INDIVIDUAL

ROUTINE

EXPLORER 721

INDIVIDUAL

ROUTINE

EXPLORER 721

INDIVIDUAL

ROUTINE

> LAST CALL

GROUP

10:22AM LOC

> SET CHANNEL

> SEND?

This facility is useful and used frequently.

1. Press CALL/MENU to enter the DSC CALL menu. LAST CALL is automatically selected. Press ENT or push

the rotary knob to display the contact details of the most recent incoming call.

2. Select the working channel. Duplex channels can’t usually be called and are automatically eliminated

from the suggested call list. If the call is to a Coast Station, the radio will recognize this and select the

correct channel.

3. The radio summarizes the call details and asks for conﬁrmation to send the call (SEND?). Press ENT or

push the rotary knob to send the call, and continue as explained in Section 5-3.

5-5 Call a Group (GROUP)

DSC CALL

INDIVIDUAL

SELECT GROUP

> RD GROUP

GROUP #2

RD GROUP

EXPLORER 721

INDIVIDUAL

ROUTINE

055554444

ROUTINE

LAST CALL

> GROUP

GROUP#3

> SET CHANNEL

> SEND?

1. Press CALL/MENU to enter the DSC CALL menu, then select GROUP. The radio displays the names of

your groups.

2. Select the group that you want to call (the Group MMSID must be set before making the call). Then set

the channel and continue as explained in Section 5-3.

5-6 Call All Ships (ALL SHIPS)

DSC CALL

LAST CALL

ALL SHIPS

> URGENCY

SAFETY

ALL SHIPS

URGENCY

> YES

GROUP

> ALL SHIPS

ROUTINE

1. Press CALL MENU to enter the DSC CALL menu, then select ALL SHIPS.

2. The priority is set automatically to URGENCY. but you can change the priority level of the DSC call to

routine, safety, urgency, or distress. Choose:

•

URGENCY only when there’s a serious situation or problem that could lead to a distress situation

SAFETY to send safety information to all other vessels in range

ROUTINE to make a routine call to all vessels (721US only)

DISTRESS only when there’s a distress situation

3. Select the working channel and press ENT or press the rotary knob. (NOTE: If you’re making a distress

call, the radio goes to CH16 automatically.) Duplex channels can’t usually be called and are automatically

eliminated from the suggested call list. If the call is to a Coast Station, the radio will recognize this and

Download fr^No^om^rthsW^tarw^Exw^plo.S^rero^Vm^HFa^Sn^eru^iea^s:l⁷s².¹c^Uo^Sm^{, 72}.¹A^EUll^OM^pera^atn^iouⁿa^anls^{d In}S^ste^ala^latrⁱc^onh^MA^ann^uad^lDownload.

select the correct channel.

3. The radio asks for conﬁrmation of the ALL SHIPS call (SEND?). Press ENT or push the rotary knob to select

YES and send the call, and continue as explained in Section 5-3.

5-7 Call using the Call Log (CALL LOG)

DSC CALL

GROUP

11 VHF721

INDIVIDUAL

ROUTINE

VHF721

> CALL BACK

DELETE

VHF721

INDIVIDUAL

ROUTINE

ALL SHIPS

> CALL LOG

10:45PM LOC

SAVE

> SET CHANNEL

VHF721

INDIVIDUAL

ROUTINE

> SEND?

The Call Log contains the contact details for the 20 most recent incoming calls, so you call any of them

again quickly.

1. Press CALL/MENU to enter the DSC CALL menu, then select CALL LOG.

The radio displays the contact details for the most recent incoming call as the ﬁrst entry (01) in the call

log.

2. Select the desired contact details. In this example, the contact details for the 11th most recent call are

displayed.

To save this contact in your buddy list, select SAVE and press ENT or push the rotary knob. Enter a name

for this contact. The logged MMSID is automatically displayed.

3. Press ENT or push the rotary knob to conﬁrm the call back, then set the working channel and press ENT

or push the rotary knob to send the call. Continue as explained in Section 5-3.

5-8 Call using the Distress Log (DIST LOG)

The Distress Log contains the data for the 10 most recent relayed distress calls, so that you can call any of

them quickly. Always try to make voice contact on CH16 ﬁrst, as follows:

1. Press CALL/MENU to enter the DSC CALL menu, then select DIST LOG.

2. The most recently received distress call is the ﬁrst entry (01) in the Distress Log. Select the entry that you

want to call. The details are displayed over two screens that alternate every 1.5 seconds; the ﬁrst screen

shows the location and name or MMSID of the vessel in distress, the second screen shows the nature

of the emergency (if speciﬁed) and the MMSID of the vessel that relayed the distress call.

3. Set the channel and continue as explained in Section 5-3.

DSC CALL

ALL SHIPS

02 10:03 UTC

VHF721 (xxx)

82º50. N

DISTRESS

RELAY

VHF721

> CALL BACK

DELETE

CALL LOG

PIRACY

> DIST LOG

27º45. W

987654321

SAVE MMSID

VHF721

INDIVIDUAL

ROUTINE

INDIVIDUAL

ROUTINE

> SEND?

> SET CHANNEL

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5-9 Request the LL Position of a Buddy (LL REQUEST)

DSC CALL

CALL LOG

LL REQUEST

> SAM

SAM

LL REQUEST

> SEND?

LL REQUEST

DIST LOG

VHF721

> LL REQUEST

BUDDY #3

CALLING...

channel name

SAM

LL REQUEST

AWAITING ACK

1. Press CALL/MENU to enter the DSC CALL menu, then select LL REQUEST.

2. Select the buddy whose LL position you want to request then press ENT or push the rotary knob to send

the request.

3. The working channel name is displayed while the radio waits for an acknowledgement from your buddy.

Continue as explained in Section 5-3-1. If there’s no reply after 1 minute the radio asks if you want to

retry. Continue as explained in Section 5-3-2.

5-9-1 Track Your Buddy (TRACK BUDDY)

Use the TRACKLIST option to select the buddy (or buddies) whose position you want to track, specify the

time interval through the INTERVAL option and then start the track. Alternatively, if the buddy and time

are already set to your preference, just start tracking.

Select Your Buddy as follows:

DSC CALL

DIST LOG

TRACK BUDDY

START TRACK

> SET BUDDY

TRACKLIST

SET BUDDY

BUDDY1

> ON

> BUDDY1 OFF

BUDDY2 ON

BUDDY3 OFF

LL REQUEST

> TRACK BUDDY

OFF

1. Press CALL/MENU to enter the DSC CALL menu, then select TRACK BUDDY.

2. Select SET BUDDY then select the buddy you want to track. You can set a maximum of 3 buddies to track.

3. Select ON to track that buddy or OFF to not track that buddy, and press ENT or push the rotary knob to

conﬁrm. (Repeat for the other two buddies if necessary.)

To delete a buddy from the tracklist, just scroll to the buddy’s name and press ENT or push the rotary knob. Select

YES to confirm, then press ENT or push the rotary knob again.

Set the Time Interval as follows:

DSC CALL

DIST LOG

TRACK BUDDY

> INTERVAL

INTERVAL

> 15 MINUTES

30 MINUTES

1 HOUR

LL REQUEST

> TRACK BUDDY

1. Press CALL/MENU to enter the DSC CALL menu, then select TRACK BUDDY.

2. Select INTERVAL, then select the desired time interval. Press ENT or push the rotary knob o conﬁrm.

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Start Tracking as follows:

DSC CALL

TRACK BUDDY

> START TRACK

SET BUDDY

START TRACK

BUDDY1 OFF

BUDDY2 ON

BUDDY3 OFF

START TRACK

> YES

DIST LOG

LL REQUEST

> TRACK BUDDY

TRACKLIST

PRESS ENTER

1. Press CALL/MENU to enter the DSC CALL menu, then select TRACK BUDDY.

2. Select START TRACK, then select YES. The START TRACK display changes to STOP TRACK. To stop tracking

at any time, just select YES.

As soon as you start tracking, an LL Request is sent immediately on CH70 and your radio waits for

acknowledgement of the (ﬁrst) buddy’s LL position to be displayed on your LCD.

Each of the selected buddies is polled for their LL positions at regular time intervals. When information

is received, a friendly ringtone is sounded and the position is shown on the LCD. Press any key to cancel

the display.

An LL position that is received is not stored in your radio’s log, but is broadcast over NAVBUS to the

chartplotters. Press any key to acknowledge or wait for the automatic 20 second timeout.

NOTE: The Explorer 721 can receive and display the LL position data at normal or enhanced resolution.

5-10 Receive an All Ships Call (RCV: ALL SHIP)

RCV: ALL SHIP

priority

When you receive notiﬁcation of an ALL SHIP call, press any key to cancel the alert.

The radio automatically selects CH16.

VHF721

The priority level and the user MMSID are displayed on the LCD. If the radio recognises

the user MMSID as one of your buddies, the buddy’s name is displayed in place of

the user MMSID.

ESC –> EXIT

No acknowledgement is required. Press PTT to initiate voice contact on CH16 and then switch to a

working channel.

The call data is stored in the Call Log (see Section 5-7).

5-11 Receive an Individual Call (RCV: INDIV)

When you receive notiﬁcation of an INDIV call,

press any key to cancel the alert.

RCV: INDIV

VHF721

INDIV ACK

VHF721

ENTER –> ACK

ESC –> EXIT

PRESS PTT

ESC –> EXIT

The radio automatically selects the channel

designated in the incoming call. INDIV calls are

almost always routine priority.

If the radio recognises the user MMSID as one of your buddies, the buddy’s name is displayed in place of

the user MMSID.

The 721US responds automatically but the 721EU prompts you to press ENT or push the rotary knob to

acknowledge the incoming call.

The caller should respond to your acknowledgement by making voice contact on the designated

channel. If this doesn’t happen, you can press PTT to initiate voice contact instead.

The call data is stored in the Call Log (see Section 5-7).

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5-12 Receive a Group Call (RCV: GROUP)

When you receive notiﬁcation of a GROUP call, press any key to cancel the alert. The

radio automatically selects the channel designated in the incoming call.

RCV: GROUP

GP: RD GROUP

VHF721

The priority level is always routine, and the group is identiﬁed on the screen. The

group will be one of the three groups of frequently called people that you set up

earlier (see Section 4-3).

ROUTINE

You don’t need to send an acknowledgement. If desired, press PTT to initiate voice contact on the

designated channel.

The call data is stored in the Call Log (see Section 5-7).

5-13 Receive a Geographic Call (RCV: GEOGRAPH)

A geographic call is sent to all vessels within a speciﬁc geographic boundary area.

RCV: GEOGRAPH

When you receive notiﬁcation of a GEOGRAPH call, press any key to cancel the alert.

The radio automatically selects the channel designated in the incoming call.

VHF721

10:34 UTC

ESC –> EXIT

The time and the user MMSID or name are displayed on the screen. If the radio

recognises the user MMSID as one of your buddies, the buddy’s name is displayed

in place of the user MMSID.

Monitor the working channel for an announcement from the calling vessel.

5-14 Receive a Polled Position Call (RCV:POSITION)

When you receive GPS position data from a buddy in response to your LL request

(see Section 5-9), you’re recommended to make a written note of the position,

especially if it’s a good ﬁshing position.

RCV: POSITION

BUDDY3

82º50.003'N

27º45.543'W

If enhanced LL position information is available from your buddy, it’s shown on the

LCD until the display changes.

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Section 6 - Distress Calls

A valid user MMSID must have been entered to access this DSC function. If you don’t have a user MMSID,

see Appendix D.

IMPORTANT: This Northstar radio is designed to generate a digital maritime distress call to facilitate search and

rescue. To be eﬀective as a safety device, this radio must be used only within the geographic range of a shore-based

VHF marine Channel 70 distress and safety watch system. The geographic range may vary but under normal condi-

tions is approximately 20 nautical miles.

6-1 Send a Distress Call

DISTRESS CALL

> ABANDONING

PIRACY

DISTRESS CALL

> PIRACY

DISTRESS CALL

SENT! WAIT..

PRESS ESC

HOLD DISTRESS

2 SECONDS..

OVER BOARD

TO CANCEL...

1. Open the red cover labelled DISTRESS.

If time is available to specify the nature of the distress, go to step 2. Otherwise, go directly to step 3.

2. Press the DISTRESS key to display the following categories. Scroll to the category that describes your

situation, then press ENT:

UNDEFINED

FIRE

FLOODING

COLLISION

GROUNDING

LISTING

SINKING

ADRIFT

ABANDONING

PIRACY

OVER BOARD

3. Hold down the DISTRESS key for about 3 seconds, until you see the distress call message (DISTRESS CALL

SENT!) on the LCD. The whole display starts to ﬂash and beep loudly.

The distress call repeats ﬁve times continuously. It then repeats randomly every 3.5 to 4.5 minutes until

a distress acknowledgement (DISTRESS ACK) is received from a search and rescue authority or until you

cancel the distress call manually.

The radio selects CH16 automatically so that you can hear any incoming voice contacts from search and

rescue authorities or other vessels within range.

Press ESC if you need to cancel the distress call. This is the only key that operates in distress mode.

6-2 Receive a Distress Acknowledgement (DISTRESS ACK)

The Coast Guard is the only agency allowed to send a Distress Acknowledgement (DISTRESS ACK).

When a distress acknowledgement is sent from the Coast Guard, your radio automatically cancels the distress

mode transmissions and CH16 is selected.

Press PTT to talk with the Coast Guard.

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6-2 Receive a Distress Call (RCV: DISTRESS)

An alert sounds when a distress call (DISTRESS!)

is received. Press any key to cancel the alert.You

don’t need to send an acknowledgement.

RCV: DISTRESS

123456789

FLOODING

RCV: DISTRESS

10:34 UTC

82º50.003'N

27º45.543'W

The radio automatically selects CH16 and

displays the details of the distress call on the

screen. Press PTT to establish voice contact.

ESC –> EXIT

The details are displayed over two screens that alternate every 1.5 seconds; the first screen shows the

user MMSID and nature of the emergency (if specified), the second screen shows the time and the

location (if specified). If the location and time aren’t specified, they’re replaced with sequences of 9s and

8s respectively.

The radio is capable of receiving enhanced LL position data if the vessel transmitting the distress call is

sending this. This provides the position of the distressed vessel to within 60 ft (20 m).

6-3 Receive a Distress Relay (RCV: DISTRESS RELAY)

An alert sounds when a distress relay (DISTRESS RELAY) is received from an individual

or from an All Ships transmission. Press any key to cancel the alert.

RCV: DISTRESS

RELAY

Try to make voice contact with the calling vessel. Maintain a listening watch on

CH16 and standby to lend assistance.

123456789

ESC –> EXIT

6-3 Relay a Distress Call from the Distress Log (RELAY)

You can relay a Distress Call in your Distress Log to an Individual or to All Ships.

VHF721

DELETE

SAVE MMSID

> RELAY

RELAY

INDIV RELAY

> MANUAL NEW

BUDDY1

> INDIV RELAY

ALL RELAY

BUDDY2

1. Press CALL/MENU to enter the DSC CALL menu, then select DIST LOG (see Section 5.8).

2. The most recently received distress call Is the ﬁrst entry (01) in the Distress Log. Select the distress call

that you want to relay, then select RELAY.

3. Now select either:

•

INDIV RELAY to relay the distress call to an individual and select MANUAL NEW if the person is

not in your buddy list, otherwise scroll to the name of your buddy. Press ENT or push the rotary

knob. (If you selected MANUAL NEW, you need to enter the user MMSID then press ENT or push

the rotary knob.)

•

ALL RELAY to relay the distress call to All Ships then press ENT or push the rotary knob.

4. The radio automatically selects CH16 and displays the details of the distress call on the screen.

5. Press ENT or push the rotary knob to relay the Distress Call.

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Appendix A - Technical Specifications

Northstar Explorer 721US and 721EU

GENERAL

Power Supply:

13.6 V DC.

Current drain: Transmit

Current drain: Receive

Baro sampling (radio oﬀ):

Useable channels:

Mode:

6 A at 25 W Tx / 1.5 A at 1 W Tx

Less than 250 mA in standby

Less than 3 mA, 85 mA in active standby

International, USA, Canada, Weather (country speciﬁc)

16K0G3E (FM) / 16K0G2B (DSC)

Handset

Works only with optional Explorer 701US or optional Explorer 701EU

PHYSICAL

LCD display (viewing):

40 (H) x 48 (W) mm

FSTN 4 x 12 character

Contrast control:

Backlight control:

Antenna connector:

Temperature Range:

Waterproof:

Yes

SO-239 (50 ohm)

-15ºC to +50ºC

JIS-7

Dimensions:

161 (W) x 75 (H) x 147 (D) mm - without bracket

Weight:

3.0 lbs (1.36 kg) without microphone

Frequency stability:

Frequency control:

GPS/NMEA input:

Comm. port:

+/- 10ppm

PLL

Yes

4800 baud NMEA, 38400 baud NAVBUS

DSC:

Yes

Rotary channel selector:

FEATURES

Flush mounting kit:

Dust cover:

Yes

Local/Distant control:

Position polling:

Track Your Buddy:

Group Call:

Yes

Call logs:

Yes - 20 individual and 10 distress

721US

DSC USCG SC101:

DSC Recreational Class S:

DSC Class D:

Canada

721EU and Canada Commercial

Barometer, Temperature

and Happy Fish:

Yes

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Channel Naming:

Yes

Tri watch, favorite channel scan: Yes

All scan:

Yes

User programmable MMSID:

MMSID and NAME directory:

Yes (User MMSID and ATIS (721EU)

Yes - 20 numbers & group

TRANSMITTER

Frequency:

156.025 - 157.425 MHz

25 W / 1 W selectable

Output power:

Transmitter protection:

Max Freq deviation:

Spurious & harmonics:

Modulation distortion:

Open / short circuit of antenna

+/- 5 kHz

better than @ 2.5 W

Less than 4% @ 1 kHz for a +/-3 kHz deviation

RECEIVER

Frequency:

156.025 - 163.275 MHz

0.25 uV (distant) / 2.5 uV (local)

more than 70 db

12 dB SINAD sensitivity:

Adjacent CH selectivity:

Spurious response:

Intermodulation rejection ratio:

Residual Noise level:

Audio output power:

more than 70 db

more than 68 db

more than -40 db unsquelched

2 W (with 8 ohm at 10% distortion)

4 W with 4 ohm external speaker

1.5' (0.5 m)

Compass safe distance:

Speciﬁcations are subject to change without notice.

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Appendix B - Troubleshooting

1. The transceiver will not power up.

A fuse may have blown OR there is no voltage getting to the transceiver.

a) Check the power cable for cuts, breaks, or squashed sections.

b) After checking the wiring, replace the 7 Amp fuse (a spare fuse is supplied).

c) Check the battery voltage. This must be greater than 10.5 V.

2. The transceiver blows the fuse when the power is switched on.

The power wires may have been reversed.

a) Check that the red wire is connected to the positive battery terminal, and the black wire is connected

to the negative battery terminal.

3. The speaker makes popping or whining noises when the engine is running.

Electrical noise may be interfering with the transceiver.

a) Re-route the power cables away from the engine.

b) Add a noise suppressor to the power cable.

c) Use resistive spark plug wires and/or use an alternator whine ﬁlter.

4. No sound from the external speaker.

a) Check that the external speaker cable is physically connected.

b) Check the soldering of the external speaker cable.

5. Transmissions are always on low power, even when high (HI) power is selected.

The antenna may be faulty.

a) Test the transceiver with a diﬀerent antenna.

b) Have the antenna checked out.

6. Battery symbol is displayed.

The power supply is too low.

a) Check the battery voltage. This should be at least 10.5 V 0.5 V DC.

b) Check the alternator on the vessel.

7. No position information is displayed.

The GPS cable may faulty or the GPS setting may be incorrect.

a) Check that the GPS cable is physically connected.

b) Check the polarity of the GPS cable.

c) Check the baud rate setting of the GPS if applicable. The baud rate setting should be 4800 for NMEA

or 38400 for NAVBUS. Parity should be set to NONE.

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Appendix C - VHF Marine Channel Charts

C.1 International (EU-DSC ON)

EU countries have special channeling requirements and the radio is cloned to match the market

requirements.

NOTE For assistance in understanding the Table, see notes a) to o) below. (WRC-2000)

Transmitting

Port operations

frequencies

Public

corres-

and ship movement

Channel

Inter-

ship

MHz

Notes

designator

pondence

Ship

stations

Coast

Single

Two

stations

frequency

156,025

160,625

156,050

156,075

156,100

156,125

156,150

156,175

156,200

156,225

156,250

156,275

156,300

156,325

156,350

156,375

156,400

156,425

156,450

156,475

156,500

156,525

156,550

156,575

156,600

156,625

156,650

156,675

156,700

156,725

156,750

156,775

160,650

160,675

160,700

160,725

160,750

160,775

160,800

160,825

160,850

160,875

m), o)

160,925

160,950

156,375

156,425

156,450

156,475

156,500

156,525

156,550

156,575

156,600

Digital selective calling for distress, safety and calling

156,650

156,675

156,700

156,725

156,750

h), i)

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Transmitting

frequencies

MHz

Port operations

and ship movement

Public

corres-

Channel

Inter-

ship

Notes

designator

pondence

Ship

stations

Coast

Single

Two

stations

frequency

AIS 1

AIS 2

156,800

DISTRESS, SAFETY AND CALLING

156,825

156,850

156,875

156,900

156,925

156,950

156,975

157,000

157,025

157,050

157,075

157,100

157,125

157,150

157,175

157,200

157,225

157,250

157,275

157,300

157,325

157,350

157,375

157,400

157,425

161,975

162,025

156,850

161,500

161,525

161,550

161,575

161,600

161,625

161,650

161,675

161,700

161,725

161,750

161,775

161,800

161,825

161,850

161,875

161,900

161,925

161,950

m), o)

162,000

161,975

162,025

SPECIAL NOTES ON INTERNATIONAL CHANNEL USEAGE

Notes referring to the Table

General notes

The International mode is not legal for use in US or Canada Waters

a. Administrations may designate frequencies in the inter-ship, port operations and ship movement services

for use by light aircraft and helicopters to communicate with ships or participating coast stations in pre-

dominantly maritime support operations under the conditions speciﬁed in Nos. 51.69, 51.73, 51.74, 51.75,

51.76, 51.77 and 51.78. However, the use of the channels which are shared with public correspondence

shall be subject to prior agreement between interested and aﬀected administrations.

b. The channels of the present Annex, with the exception of channels 06, 13, 15, 16, 17, 70, 75 and 76, may

also be used for high-speed data and facsimile transmissions, subject to special arrangement between

interested and aﬀected administrations.

c. The channels of the present Annex, but preferably channel 28 and with the exception of channels 06,

13, 15, 16, 17, 70, 75 and 76, may be used for direct-printing telegraphy and data transmission, subject

to special arrangement between interested and aﬀected administrations.

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d. The frequencies in thisTable may also be used for radiocommunications on inland waterways in accord-

ance with the conditions speciﬁed in No. 5.226. – 56 – 62238 IEC:2003(E)

e. Administrations having an urgent need to reduce local congestion may apply 12,5 kHz channel interleav-

ing on a non-interference basis to 25 kHz channels, provided:

– Recommendation ITU-R M.1084-2 shall be taken into account when changing to 12,5 kHz channels;

– it shall not aﬀect the 25 kHz channels of the present Annex maritime mobile distress and safety fre-

quencies, especially the channels 06, 13, 15, 16, 17, and 70, nor the technical characteristics mentioned

in Recommendation ITU-R M.489-2 for those channels;

– implementation of 12,5 kHz channel interleaving and consequential national requirements shall be

subject to prior agreement between the implementing administrations and administrations whose ship

stations or services may be aﬀected.

Speciﬁc notes

The frequency 156,300 MHz (channel 06) (see No. 51.79 and Appendices 13 and 15) may also be used for

communication between ship stations and aircraft stations engaged in coordinated search and rescue

operations. Ship stations shall avoid harmful interference to such communications on channel 06 as well

as to communications between aircraft stations, ice-breakers and assisted ships during ice seasons.

g. Channels 15 and 17 may also be used for on-board communications provided the eﬀective radiated

power does not exceed 1 W, and subject to the national regulations of the administration concerned

when these channels are used in its territorial waters.

h. Within the European Maritime Area and in Canada, these frequencies (channels 10, 67, 73) may also

be used, if so required, by the individual administrations concerned, for communication between ship

stations, aircraft stations and participating land stations engaged in coordinated search and rescue and

anti-pollution operations in local areas, under the conditions speciﬁed in Nos. 51.69, 51.73, 51.74, 51.75,

51.76, 51.77 and 51.78.

The preferred ﬁrst three frequencies for the purpose indicated in Note a) are 156,450 MHz (channel

09),156,625 MHz (channel 72) and 156,675 MHz (channel 73).

Channel 70 is to be used exclusively for digital selective calling for distress, safety and calling.

k. Channel 13 is designated for use on a worldwide basis as a navigation safety communication channel,

primarily for intership navigation safety communications. It may also be used for the ship movement

and port operations service subject to the national regulations of the administrations concerned.

These channels (AIS 1 and AIS 2) will be used for an automatic ship identiﬁcation and surveillance system

capable of providing worldwide operation on high seas, unless other frequencies are designated on a

regional basis for this purpose.

m. These channels may be operated as single frequency channels, subject to special arrangement between

interested or aﬀected administrations. (WRC-2000)

n. The use of these channels (75 and 76) should be restricted to navigation-related communications only

and all precautions should be taken to avoid harmful interference to channel 16, e.g. by limiting the

output power to 1 W or by means of geographical separation.

o. These channels may be used to provide bands for initial testing and the possible future introduction

of new technologies, subject to special arrangement between interested or aﬀected administrations.

Stations using these channels or bands for the testing and the possible future introduction of new

technologies shall not cause harmful interference to, and shall not claim protection from, other stations

operating in accordance with Article 5. (WRC-2000)

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C.2 USA Channel Chart

SEND

(MHz)

RECEIVE TRAFFIC TYPE

(MHz)

SHIP SHIP NAME TAG

TO TO

SHIP SHORE

01A 156.050 156.050

03A ⁴156.150 156.150

05A 156.250 156.250

Port Operations, Selected VTS Areas

US Government, Coast Guard

Port Operations, Selected VTS Areas

Inter-ship Safety

Yes Yes

PORT OPS/VTS

UNAUTHORIZED

PORT OPS/VTS

SAFETY

Yes

Yes Yes

Yes No

Yes Yes

Yes No

Yes Yes

156.300 156.300

07A 156.350 156.350

Commercial

COMMERCIAL

CALLING

156.400 156.400

156.450 156.450

156.500 156.500

156.550 156.550

156.600 156.600

Commercial (inter-ship only)

Recreational Calling Channel

Commercial

COMMERCIAL

VTS

Commercial, VTS in Selected Areas

Port Operations, Selected VTS Areas

PORT OPS/VTS

BRIDGE COM

13 ³156.650 156.650

Intership Navigation Safety (bridge- Yes No

to-bridge), 1W with Power-up

15 ²RX Only 156.750

16 156.800 156.800

156.700 156.700

Port Operations, Selected VTS Areas

Environmental, RX Only

Yes Yes

PORT OPS/VTS

------ ------ ENVIROMENTAL

International Distress, Safety, and

Calling

Yes Yes

DISTRESS

17 ¹156.850 156.850

18A 156.900 156.900

19A 156.950 156.950

State Controlled – 1W Only

Commercial

Yes Yes

SAR

COMMERCIAL

PORT OPS

Commercial

157.000 161.600

Port Operations, Canadian Coast

Guard, Duplex

Yes

20A 157.000 157.000

21A ⁴157.050 157.050

Port Operations

Yes Yes

PORT OPS

U.S. Government, Canadian Coast

Guard

UNAUTHORIZED

22A 157.100 157.100

23A ⁴157.150 157.150

Coast Guard Liaison

Yes Yes

COAST GUARD

UNAUTHORIZED

TELEPHONE

U.S. Government, Coast Guard

Yes

157.200 161.800

157.250 161.850

157.300 161.900

157.350 161.950

157.400 162.000

Public Correspondence, Marine

Operator

Yes

Public Correspondence, Marine

Operator

Yes

TELEPHONE

Public Correspondence, Marine

Operator

Public Correspondence, Marine

Operator

Public Correspondence, Marine

Operator

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SEND

(MHz)

RECEIVE TRAFFIC TYPE

(MHz)

SHIP SHIP NAME TAG

TO TO

SHIP SHORE

61A ⁴156.075 156.075

63A 156.175 156.175

64A ⁴156.225 156.225

U.S. Government, Canadian Coast

Guard

Yes Yes

UNAUTHORIZED

PORT OPS/VTS

UNAUTHORIZED

Port Operations, VTS in Selected

Areas

Yes Yes

U.S. Government, Canadian

Commercial Fishing

65A 156.275 156.275

66A 156.325 156.325

67 ³156.375 156.375

Port Operations

Yes Yes

Yes No

PORT OPS

BRIDGE COM

Commercial, bridge-to-bridge, 1W

with Power-up

156.425 156.425

156.475 156.475

Boat Operations, Recreational

Digital Selective Calling - DSC

Boat Operations, Recreational

Port Operations

Yes No

Yes Yes

------ ------

Yes Yes

Yes No

Yes Yes

Yes No

Yes Yes

SHIP - SHIP

PLEASURE

DSC

70 ⁶156.525 156.525

156.575 156.575

156.625 156.625

156.675 156.675

156.725 156.725

PLEASURE

SHIP - SHIP

PORT OPS

SHIP - SHIP

COMMERCIAL

UNAUTHORIZED

Port Operations

77 ¹156.875 156.875

78A 156.925 156.925

79A 156.975 156.975

80A 157.025 157.025

81A ⁴157.075 157.075

Port Operations –1W Only

Boat Operations, Recreational

Commercial

U.S. Government, Environmental

Protection Agency Operations

Yes

82A ⁴157.125 157.125

U.S. Government, Canadian Coast

Guard

UNAUTHORIZED

TELEPHONE

83A ⁴157.175 157.175

U.S. Government, Canadian Coast

Guard

157.225 161.825

157.275 161.875

157.325 161.925

157.375 161.975

157.425 162.025

Public Correspondence, Marine

Operator

Public Correspondence, Marine

Operator

TELEPHONE

Public Correspondence, Marine

Operator

TELEPHONE

Public Correspondence, Marine

Operator

TELEPHONE

Public Correspondence, Marine

Operator

TELEPHONE

88A 157.425 157.425

Commercial, Intership Only

Yes No

COMMERCIAL

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WEATHER

Wx01

Wx02

Wx03

Wx04

Wx05

Wx06

Wx07

Wx08

Wx09

Wx10

MHz

TRAFFIC TYPE

NAME TAG

------ ------ NOAA WX

------ ------ CANADA WX

------ ------ NOAA WX

RX Only 162.550 NOAA WEATHER CHANNEL

RX Only 162.400 NOAA WEATHER CHANNEL

RX Only 162.475 NOAA WEATHER CHANNEL

RX Only 162.425 NOAA WEATHER CHANNEL

RX Only 162.450 NOAA WEATHER CHANNEL

RX Only 162.500 NOAA WEATHER CHANNEL

RX Only 162.525 NOAA WEATHER CHANNEL

RX Only 161.650 CANADIAN WEATHER CHANNEL

RX Only 161.775 CANADIAN WEATHER CHANNEL

RX Only 163.275 NOAA WEATHER CHANNEL

SPECIAL NOTES ON USA CHANNEL USAGE

1. LOW POWER (1 W) only.

2. Receive Only.

3. LOW POWER (1W) initially. Override to HIGH POWER by holding down H/L key before transmitting. Used

normally in bridge-to-bridge communications.

4. Lightly Shaded Simplex channels 03A, 21A, 23A, 61A, 64A, 81A, 82A, and 83A cannot be lawfully used in

U.S. waters unless special authorization is obtained from the U.S. Coast Guard. Not for use by the general

public.

5. The letter“A”illuminated by the channel number indicates the USA channel is simplex.This same channel

is always duplex when selecting International. There is no “A” reference for International channels. The

letter“B”is only used for some Canadian“Receive Only”channels.

6. Channel 70 is designated for use exclusively for Digital Selective Calling (DSC), such as Distress, Safety,

and Ship Calls. No voice communication is allowed on CH70.

Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual

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C-3 CANADA Channel CHART

CH SEND

(MHz)

RECEIVE TRAFFIC TYPE

(MHz)

SHIP SHIP TO NAME TAG

SHORE

SHIP

156.050 160.650

156.100 160.700

156.150 160.750

Public Correspondence, Duplex

Canadian Coast Guard, SAR

Yes

TELEPHONE

CANADIAN CG

PORT OPS/VTS

04A 156.200 156.200

05A 156.250 156.250

Port Operations, VTS in Selected

Areas

156.300 156.300

Inter-ship Safety

Yes

SAFETY

07A 156.350 156.350

Commercial

COMMERCIAL

CALLING

156.400 156.400

156.450 156.450

156.500 156.500

156.550 156.550

156.600 156.600

Commercial (inter-ship only)

Recreational Calling Channel

Commercial

COMMERCIAL

VTS

Commercial, VTS in Selected Areas Yes

Port Operations, VTS in Selected

Areas

Yes

PORT OPS/VTS

13 ³156.650 156.650

14 156.700 156.700

Intership Navigation Safety (bridge- Yes

to-bridge) 1W with power-up

BRIDGE COM

Port Operations, VTS in Selected

Areas

Yes

PORT OPS/VTS

15 ¹156.750 156.750

16 156.800 156.800

Commercial – 1W Only

Yes

COMMERCIAL

DISTRESS

International Distress, Safety, and Yes

Calling

17 ¹156.850 156.850

18A 156.900 156.900

19A 156.950 156.950

20 ¹157.000 161.600

State Controlled – 1W Only

Commercial

Yes

SAR

COMMERCIAL

CANADIAN CG

Canadian Coast Guard

Canadian Coast Guard, Duplex– 1W No

Only

157.050 161.650

Port Operations, Duplex

Yes

PORT OPS

21A 157.050 157.050

U.S. Government, Canadian Coast Yes

Guard

UNAUTHORIZED

21B RX Only 161.650

22A 157.100 157.100

Port Operations, RX Only

------ ------

PORT OPS

Canadian Coast Guard Liaison

Public Correspondence, Duplex

Public Correspondence, RX Only

Public Correspondence, Duplex

Yes

CANADIAN CG

TELEPHONE

157.150 161.750

157.200 161.800

157.250 161.850

25B RX Only 161.850

------ ------

157.300 161.900

157.350 161.950

157.400 162.000

Yes

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CH SEND

(MHz)

RECEIVE TRAFFIC TYPE

(MHz)

SHIP SHIP TO NAME TAG

SHORE

SHIP

28B RX Only 162.000

60 156.025 160.625

Public Correspondence, RX Only

Public Correspondence, Duplex

------ ------

TELEPHONE

Yes

TELEPHONE

61A ⁴156.075 156.075

U.S. Government, Canadian Coast

Guard

Yes

UNAUTHORIZED

62A 156.125 156.125

Canadian Coast Guard

Yes

CANADIAN CG

TELEPHONE

156.225 160.825

Public Correspondence, Duplex

64A ⁴156.225 156.225

U.S. Government, Canadian

Commercial Fishing

UNAUTHORIZED

65A 156.275 156.275

66A ¹156.325 156.325

Port Operations

Yes

PORT OPS

Port Operations – 1W Only

Commercial, SAR

PORT OPS

156.375 156.375

156.425 156.425

156.475 156.475

COMMERCIAL

SHIP - SHIP

COMMERCIAL

DSC

Boat Operations, Recreational

Commercial Fishing Only

Digital Selective Calling - DSC

Boat Operations, Recreational

Intership

70 ⁶156.525 156.525

------ ------

156.575 156.575

156.625 156.625

156.675 156.675

156.725 156.725

Yes

PLEASURE

SHIP - SHIP

COMMERCIAL

PORT OPS

Commercial Fishing Only

Port Operations –1W Only

Boat Operations, Recreational

Commercial

77 ¹156.875 156.875

78A 156.925 156.925

79A 156.975 156.975

80A 157.025 157.025

81A ⁴157.075 157.075

SHIP - SHIP

COMMERCIAL

UNAUTHORIZED

Commercial

U.S. GovernmENT or push the rotary Yes

knob Operations

82A ⁴157.125 157.125

U.S. Government, Canadian Coast

Guard

Yes

UNAUTHORIZED

157.175 161.775

Canadian Coast Guard

Yes

CANADIAN CG

83A ⁴157.175 157.175

U.S. Government, Canadian Coast

Guard

Yes

UNAUTHORIZED

83B RX Only 161.775

Canadian Coast Guard, RX Only

------ ------

CANADIAN CG

TELEPHONE

157.225 161.825

157.275 161.875

157.325 161.925

157.375 161.975

157.425 162.025

Public Correspondence, Marine

Operator

Yes

Public Correspondence, Marine

Operator

TELEPHONE

Public Correspondence, Marine

Operator

Public Correspondence, Marine

Operator

Public Correspondence, Marine

Operator

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WEATHER

Wx01

Wx02

Wx03

Wx04

Wx05

Wx06

Wx07

Wx08

Wx09

Wx10

MHz

TRAFFIC TYPE

NAME TAG

------ ------ NOAA WX

------ ------ CANADA WX

------ ------ NOAA WX

RX Only 162.550 NOAA WEATHER CHANNEL

RX Only 162.400 NOAA WEATHER CHANNEL

RX Only 162.475 NOAA WEATHER CHANNEL

RX Only 162.425 NOAA WEATHER CHANNEL

RX Only 162.450 NOAA WEATHER CHANNEL

RX Only 162.500 NOAA WEATHER CHANNEL

RX Only 162.525 NOAA WEATHER CHANNEL

RX Only 161.650 CANADIAN WEATHER CHANNEL

RX Only 161.775 CANADIAN WEATHER CHANNEL

RX Only 163.275 NOAA WEATHER CHANNEL

SPECIAL NOTES ON CANADA CHANNEL USAGE

1. LOW POWER (1 W) only.

2. Receive Only.

3. LOW POWER (1W) initially. Override to HIGH POWER by holding down H/L key before transmitting. Used

normally in bridge-to-bridge communications.

4. Lightly Shaded Simplex channels 21A, 23A, 61A, 64A, 81A, 82A, and 83A cannot be lawfully used in

Canada waters unless special authorization is obtained from the Canadian Coast Guard. Not for use by

the general public.

5. The letter “A” illuminated by the channel number indicates the Canada channel is simplex. This same

channel is always duplex when selecting International.There is no“A”reference for International channels.

The letter“B”is only used for some Canadian“Receive Only”channels.

6. Channel 70 is designated for use exclusively for Digital Selective Calling (DSC), such as Distress, Safety,

and Ship Calls. No voice communication is allowed on CH70.

7. The CANADA mode is not legal to use in U.S. waters.

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C-4 EU INLAND WATERWAY CHANNELS - Country Specific

For speciﬁc channel information for your country, please refer to local authorities.

SPECIFIC

FOOTNOTES

RANSMITTING

SHIP-TO-SHIP SHIP-TOPORT NAUT.INFORM

FREQUENCY (MHZ)

SHIP

156.025

156.05

156.075

156.1

LAND

160.625

160.65

160.675

160.7

156.125

156.15

156.175

156.2

160.725

160.75

160.775

160.8

156.225

156.25

156.275

156.3

160.825

160.85

160.875

156.3

a) b)

156.325

156.35

156.375

156.4

160.925

160.95

156.375

156.4

a) c)

a) q)

156.425

156.45

156.475

156.5

156.425

156.45

156.475

156.5

a) b) c)

156.525

Digital selective calling for distress,

saftey and calling

156.55

156.575

156.6

156.55

156.575

156.6

a) r)

156.625

156.65

156.675

156.7

156.625

156.65

156.675

156.7

f) g)

156.725

156.75

156.775

156.8

156.725

156.75

156.775

156.8

j) d) o)

156.825

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AIS 1

AIS 2

156.85

156.875

156.9

156.85

156.875

161.5

a) k)

156.925

156.95

156.975

157

161.525

161.55

161.575

161.6

157.025

157.05

157.075

157.1

161.625

161.65

161.675

161.7

l) m)

157.125

157.15

157.175

157.2

161.725

161.75

161.775

161.8

a) m)

157.225

157.25

157.275

157.3

161.825

161.85

161.875

161.9

a) m)

157.325

157.35

157.375

157.4

161.925

161.95

157.375

162

a) d)

a) p)

a) n)

157.425

161.975

162.025

157.425

161.975

162.025

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1.1 General remarks to frequency table 1

1.1.1 The channels for service categories ship-to-ship and nautical information may also be used for vessel

traﬃc-systems by traﬃc centres.

1.1.2 In some countries, frequencies certain channels are used for another service category or other radio serv-

ices. These countries are Austria, Bulgaria, Croatia,, the Federal Republic ofYugoslavia, Hungary, Moldova,

Romania, the Russian Federation, the Slovak Republic, the Czech Republic (with exemption of channels

08, 09, 72, 74 and 86), Ukraine and the Federal Republic of Yugoslavia. The Administrations concerned

should make any possible attempt to make these frequencies channels as soon as possible available for

the radiotelephone service on Inland Waterways and/or the required service category.

1.2 Explanation of speciﬁc footnotes in frequency table 1

a. In the countries mentioned under 1.1.2, it is strictly prohibited to use this channel.

b. This channel is not allowed to be used between Rhine km 150 and km 350.

c. In the Netherlands, this channel is used by for its on-scene communications during safety operations

on the North Sea, IJsselmeer, Waddenzee, Ooster- and Westerschelde.

d. This channel may also be used for piloting, mooring, tugging and for other nautical purposes.

e. This channel is the ﬁrst ship-to-ship channel, unless the competent authority has designated another

channel.

In the countries mentioned under 1.1.2, it is allowed that the output power is set to a value between 6

and 25 W until 1 January 2005.

In the countries mentioned under 1.1.2, this channel is used for service category ship-to-port authori-

ties.

g. In the Netherlands, this channel is used by its national coastguard for communications during oil pol-

lution operations on the North Sea and for safety messages for the North Sea, Waddenzee, IJsselmeer,

Ooster- and Westerschelde.

h. This channel may be used only for service category on-board on board communications.

This channel may be used only for communications between seagoing vessels and participating land

stations in case of distress and safety communications within the maritime sea-areas.

In the countries mentioned under 1.1.2, this channel may be used only for distress, safety and calling.

The output power shall be reduced automatically to a value between 0.5 and 1 W.

k. This channel may be used for communications with a social character.

In the Netherlands and Belgium, this channel may be used for transmitting messages concerning bunker-

ing and victualling. The output power has to be reduced manually to a value between 0.5 and- 1 W.

m. This channel may also be used for public correspondence.

n. This channel will be used for an automatic ship identiﬁcation and surveillance system (AIS) capable of

providing worldwide operating on seas and Inland Waterways.

o. The availability of this channel is on a voluntary basis. All existing equipment shall be capable to of

operating on this channel within a ten-year period after the entry into force of this Arrangement.

p. After permission of the competent authority, this channel may be used only for special events on a

temporary basis.

q. In the Czech Republic this channel is used for service category nautical information.

In the Czech Republic this channel is used for service category ship-to-port authorities.

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Appendix D - MMSID and License Information

You must obtain a user MMSID (Marine Mobile Service Identity) and enter it into your radio in order to use

the DSC functions. Contact the appropriate authorities in your country. If you’re unsure who to contact,

consult your Northstar dealer.

The user MMSID is a unique nine digit number, similar to a personal telephone number. It is used on marine

transceivers that are capable of using DSC (Digital Select Calling).

Depending upon your location, you may need a radio station license for the VHF 721. You may also need an

individual operator’s license.

Brunswick New Technologies Inc. recommends that you check the requirements of your national radio

communications authorities before operating DSC functions.

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Section 7 - Install the Explorer 721

7-1 Installation Options

There are two ways to install the radio. You can choose:

•

a deck or overhead mounted gimbal installation. The reversible mounting gimbal is ﬁxed to to a suitable

site and the radio is placed into it. The radio can be removed for storage and the viewing angle can be

adjusted.

•

a recessed installation.The radio is recessed into a cavity cut into a bulkhead.The radio ﬁxture is permanent

and the viewing angle cannot be adjusted.

NOTE: An optional handset with a 9.8` (3 m) docking cable included can be purchased and connected to your

Explorer 721 base unit to give second station operation and intercom capability. The optional 701US handset

(for the Explorer 721US) and the optional 701EU handset (for the Explorer 721EU) are shown on the front cover.

7-2 Location Requirements

Please check these BEFORE doing any cutting or drilling.

Whichever installation method you choose, ensure that the chosen location:

•

is at least 3' (1 m) from the antenna

allows easy connection to (at least) a 10 Amp fused 13.6 V DC electrical source and the antenna

is at least 1.5' (45 cms) from the compass to avoid creating magnetic deviation of the compass during

radio operation

•

has a suitable space close by for installing the microphone bulkhead mount

provides easy access to the controls on the front panel

provides reasonable access to the wiring at the back of the radio

provides enough room to ﬁx the DSC warning label (721US only).

7-3 Checklist

The following items should be supplied in the box. Check before starting the installation and contact your

dealer if an item is missing.

NOTE: An antenna is NOT provided. Consult your Northstar dealer for advice if necessary.

1. Mounting gimbal for the VHF radio

2. Power supply cable with inbuilt 7 Amp fuse

3. External speaker connection cable with white (+) wire and black (-) wire

4. GPS connection cable

5. Two mounting knobs

6. Microphone bulkhead mount

7. Four self-tapping screws for the mounting gimbal

8. Four ﬂat screws for the mounting gimbal

9. Four spring washers for the mounting gimbal

10. Four plain washers for the mounting gimbal

11. Four nuts for the mounting gimbal

12. Two self-tapping screws for the microphone bulkhead mount

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13. Two ﬂat screws for the microphone bulkhead mount

14. Two spring washers for the microphone bulkhead mount

15. Two plain washers for the microphone bulkhead mount

16. Two nuts for the microphone bulkhead mount

17. Two ﬂush-mount brackets for recessed installation

18. Two M5x32 screws for recessedinstallation

19. Two M5x10 screws for recessed installation

20. Two plastic stoppers for the recessed installation (not pictured)

21. Installation template (not pictured)

22. One 7 Amp spare fuse (not pictured) in case of accidental reverse of battery polarity

23. Explorer 721 base unit and microphone (not pictured)

24. Explorer 721 protective cover (not pictured)

18 & 19

7-4 Gimbal Installation

1. Hold the mounting gimbal at the chosen location and use a soft pencil to mark the screw hole positions

onto the mounting surface.

2. If you can’t reach behind the mounting surface to attach the nuts, use the self-tapping screws instead

of the ﬂat screws shown in the picture. If you’re drilling into ﬁberglass, use a drill bit smaller than 3/16”

(5mm) to drill the pilot holes.

Otherwise, drill the four screw holes where marked, using a 3/16”(5mm) drill bit. Drill completely through

the mounting surface.

3. Use a Philips screwdriver and the set of four ﬂat screws, spring washers, plain washers, and nuts to attach

the mounting gimbal to the location site.

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4. Slide the radio into the mounting gimbal.

5. Insert the two mounting knobs through the holes and tighten them suﬃciently to hold the radio at the

desired viewing angle.

7-5 Change the Viewing Angle

The viewing angle on the gimbal mount has a 20º tilt range. To change the current viewing angle on the

gimbal mount:

1. Support the radio, then cautiously loosen the mounting knobs until the radio can be moved.

2. Re-position the radio then tighten the mounting knobs again.

7-6 Recessed Installation

1. Tape the installation template onto the chosen location site.

2. Cut out the area marked by the solid dark line. (The dashed line indicates the total area that will be

covered by the radio fascia after installation.)

3. Remove the installation template and slide the radio into the cavity.

4. Working from the rear of the bulkhead, align the racheted outstand on each side of the radio with the

central hole in each mounting bracket.

5. Use the two short M5x10 screws to screw the mounting brackets to the sides of the radio.

6. Screw each M5x32 screw through the screw hole in the mounting bracket, then attach the stopper. If

your bulkhead exceeds 0.51” (13mm), the stopper can be discarded if necessary.

7. Tighten the M5x32 screws until the radio is held ﬁrmly against the rear of the bulkhead.

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7-7 Install the Microphone Bulkhead Mount

1. Hold the microphone bulkhead mount at the

chosen location and use a soft pencil to mark

the screw hole positions on the mounting

surface.

ꢀꢁꢂꢃꢄ ꢅꢆꢇꢁꢈ MM

Ensure that the microphone curly cable will

comfortably reach this location BEFORE you drill.

2. Drill the two pilot screw holes where marked.

3. Use a short length Philips screwdriver and the

set of two ﬂat screws, spring washers, plain

washers, and nuts to secure the microphone

bulkhead mount at the location site.

4. Hang the microphone on its mount.

NOTE: This mic clip has a special magnet glued in the rear of the clip to sense ON/OFF HOOK. Other mic

hangers cannot be used.

7-8 Connect the Radio Cables

The connectors are on the rear of the base unit, as follows:

1. GPS connector. Plug the GPS cable jack into the connector. (If you’re not using this, be sure to put the

protective cap securely over the connector to protect it from moisture and dust.)

2. Docking Cable connector for optional Handset. Plug the docking cable jack into the connector. (If

you’re not using this, be sure to put the protective cap securely over the connector to protect it from

moisture and dust.)

3. External Speaker connector. Plug the external speaker cable jack into the connector BEFORE powering

on the radio. Use a 4 Ohm 4 Watt external speaker.

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4. BLACK Power wire. Connect this to the NEGATIVE (-) battery terminal.

5. RED Power wire. Connect this to the POSITIVE (+) battery terminal. Check that a 10 Amp fuse is installed

on this power cable close to the battery.

6. ANT. A radio antenna is not supplied. A suitable radio antenna must be mounted and connected before

operating the Explorer 721 radio. Consult your dealer for advice if necessary.

7. GND. A ground connection is not usually required..

7-9 Set Up the Radio

IMPORTANT: You can’t make any DSC transmissions until you’ve obtained a user MMSID and entered it into your

Explorer 721.

The user MMSID is a unique nine digit number, similiar to a personal telephone number. It is used on

marine transceivers that are capable of using DSC (Digital Select Calling).

If you don’t have a user MMSID contact the appropriate authorities in your country. If you’re unsure who

to contact, consult your Northstar dealer.

7-10 Enter Your User MMSID

WARNING: This is a once-only operation.

DSC SETUP

INPUT USER

MMSID

187654321

MMSID

USER MMSID

INPUT AGAIN

–––––––––

> USER MMSID

GROUP SETUP

INDIV REPLY

–––––––––

> STORE

CANCEL

1. Select DSC SETUP, then USER MMSID. A dashed line appears.

Enter your user MMSID along the dashed line. Press ENT or push the rotary knob to conﬁrm each correct

entry and to move to the next digit.

If you make an error, press CH - until < appears, then press ENT or push the rotary knob to backup and

correct the entry.

3. Press ENT or push the rotary knob to store your user MMSID.

4. Enter your user MMSID again as a password check, then press ENT or push the rotary knob to permanently

store the user MMSID and return to the menu.

You can view your stored user MMSID at anytime by selecting USER MMSID in the main menu.

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7-11 The Completed Installation (with Optional Handset)

Optional Handset

Wallplate on bulkhead

Handset docking cable

External

speaker

M84

Northstar GPS

product

VHF Antenna

External speaker

connection cable

Antenna connection cable

BLACK

power

cable

Fuse on RED

power cable

Battery

Base unit with microphone

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UNITED STATES

30 Sudbury Road,

Acton, MA 01720,

United States

EUROPE

Unit 2, Ocean Quay,

Belvidere Rd, Southampton,

SO14 5QY, England

Ph: +1 978.897.6600

Fax: +1 978.897.7241

[email protected]

Ph: +44 2380 339922