NASA SX 35 DSC User Manual

SX 35 DSC  
OWNER’S HANDBOOK  
DECLARATION OF CONFORMITY  
(As required by Article 6.3 of Directive 1999/5/EC-RTTE Directive)  
Declares under his sole responsibility that the produced Marine VHF radio  
transceiver manufactured by  
NASA MARINE LTD.  
Boulton Road  
Stevenage, Herts, SG1 4QG  
England  
Telephone +44(0)1438 354033  
Telefax +44(0)1438 741498  
Intended for Worldwide use as a Class D DSC VHF Radiotelephone for use  
aboard non-SOLAS vessels and identified by type number  
NASA DSC RADIO  
to which this declaration refers, has been tested to the essential radio test  
suites required by the notified body and is in conformity with the standards  
EN 301 025-2  
EN 301 025-3  
EN60945  
and complies with the essential requirements of Directive 1999/5/EC.  
Conformity procedure under Annex IV of 1999/5/EC (Technical Construc-  
tion file) has been undertaken by  
EMCCert Dr. Rasek of Boelwiese 5, 91320 Ebermannstadt, Germany.  
The Technical Construction File is held by Mr. Alan Mully at  
NASA MARINE LTD.  
Boulton Road  
Stevenage, Herts, SG1 4QG  
England  
Telephone +44(0)1438 354033  
Telefax +44(0)1438 741498  
Alan Mully-Director-NASA MARINE Ltd.  
0678  
SX 35 DSC  
1
NOTICE  
This device is only and aid to navigation. Its performance can be  
affected by many factors including equipment failure or defects,  
environmental conditions, and improper handling or use. It is the  
users’s responsibility to exercise common prudence and naviga-  
tional judgement, and this device should not be relied upon as a  
substitute for such prudence and judgement. Your NASA SX35  
DSC VHF radio generates and radiates radio frequency (RF) elec-  
tromagnetic energy (EME). This equipment must be installed and  
operated in accordance with the instructions contained in this hand-  
book. Failure to do so can result in personal injury and/or product  
malfunction.  
Antenna Mounting and EME Exposure  
For optimal radio performance and minimal human exposure to  
radio frequency electromagnetic energy, make sure the antenna is:  
Connected to the radio before transmitting  
Properly mounted  
Located where it will be away from people  
Located at least three feet (91 cm) from the Base Station trans-  
ceiver and handsets.  
2
SX 35 DSC  
TABLE OF CONTENTS  
DECLARATION OF CONFORMITY............................................................1  
GENERAL INFORMATION ............................................................................5  
Introduction ...................................................................................................5  
LICENSE INFORMATION ..............................................................................6  
United Kingdom ...........................................................................................6  
Digital Selective Calling (DSC) Capability .............................................7  
Required License Information ...................................................................7  
Equipment Required ....................................................................................7  
Equipment Supplied ....................................................................................7  
Optional Equipment.....................................................................................7  
BASIC RADIO COMMUNICATION PROCEDURES ...............................8  
Using Channel 16 ..........................................................................................8  
Calling Another Vessel ................................................................................9  
Telephone Calls.............................................................................................9  
Prohibited Communication ......................................................................10  
INSTALLATION ..............................................................................................11  
Transceiver ...................................................................................................11  
Antenna.........................................................................................................11  
Power Connection .......................................................................................11  
NMEA Cable ................................................................................................12  
External Speaker Connection ...................................................................12  
Rear Panel Connectors ...............................................................................12  
Antenna Connector .....................................................................................12  
OPERATION .....................................................................................................13  
General ..........................................................................................................13  
Display and Controls .................................................................................13  
Basic Operation ...........................................................................................14  
Power On/Off ..............................................................................................14  
Volume and Squelch ..................................................................................14  
Channel Selection .......................................................................................15  
Channel Banks.............................................................................................15  
Keypad, Transceiver ...................................................................................15  
Keypad, Microphone ..................................................................................16  
OPERATING PROCEDURES ........................................................................17  
Primary Calling Channel...........................................................................17  
Transmitting ................................................................................................17  
Working Channel Recall ...........................................................................18  
Transmitter Power Setting ........................................................................18  
Channel Scanning .......................................................................................18  
Priority Scan .................................................................................................19  
All Scan .........................................................................................................19  
SX 35 DSC  
3
Memory Scan ...............................................................................................20  
Menu Functions...........................................................................................21  
Main Menu Topics......................................................................................22  
Directory .................................................................................................22  
Lamp ........................................................................................................25  
Contrast ...................................................................................................26  
Data Set ...................................................................................................26  
MMSID Set.............................................................................................29  
Time Set ..................................................................................................30  
NMEA Set ...............................................................................................31  
DSC OPERATION ...........................................................................................32  
MMSID .........................................................................................................32  
Sending a Distress Call..............................................................................33  
Receiving Distress Calls ............................................................................35  
Distress sent by another vessel...........................................................35  
Distress ACK sent to another vessel..................................................36  
Distress Relay from another vessel ...................................................36  
Normal DSC Calls ......................................................................................37  
Individual DSC Call .............................................................................37  
Directory Call .........................................................................................37  
Manual Call ............................................................................................39  
All Ships Call .........................................................................................40  
Group Call ..............................................................................................42  
Receiving DSC Calls ..................................................................................43  
Individual Call Received .....................................................................43  
Last Call Received .................................................................................45  
All Ships Call Received .......................................................................46  
Group Call Received.............................................................................46  
REFERENCE ......................................................................................................47  
Maintenance.................................................................................................47  
Special Functions ........................................................................................47  
Simulator Mode .....................................................................................47  
Clear Memory Channels ......................................................................47  
New Microphone...................................................................................47  
Printer Operation ........................................................................................47  
Troubleshooting ..........................................................................................48  
Specifications...............................................................................................49  
Channel Assignments ................................................................................53  
4
SX 35 DSC  
GENERAL INFORMATION  
Congratulations on your purchase of the SX 35 DSC. It is an advanced ma-  
rine VHF communication transceiver offering Digital Selective Calling, an  
easy to use four line LCD display, and a separate Channel 70 receiver.  
NOTICE  
Unauthorized changes or modifications to this equipment may void com-  
pliance with Regulatory Agency Type Acceptance. Any changes or modifi-  
cation must be approved in writing by the manufacturer.  
NOTICE  
This radio transceiver has been tested and complies with EN-301 025-1 v1.1.2  
(August 2000). This specification provides reasonable protection against  
harmful interference in a normal installation. This radio generates, uses  
and radiates radio frequency energy and, if not installed and used in accor-  
dance with the instructions, may cause harmful interference to other ma-  
rine electronic equipment. However, there is no guarantee that interference  
will not occur in a particular installation. If this radio does cause harmful  
interference to marine electronic equipment, which can be determined by  
turning this radio Off and On, the user is encouraged to try to correct the  
interference by one or more of the following measures:  
Reorient or relocate the antenna.  
Increase separation between this radio and other marine electronic  
equipment.  
Connect this radio to a power source different from that of other ma-  
rine electronic equipment.  
Consult your dealer or an experienced technician for help.  
Introduction  
Your SX 35 DSC VHF Transceiver is designed for operation in the marine  
VHF FM frequency band. The operating frequency range is 156.025 to 163.275  
MHz which includes all currently allocated International channels and  
United Kingdom M and M2 marina channels.  
The transceiver has Digital Selective Calling (DSC) capabilities conforming  
to EN-301 025-1 v1.1.2 operation. Distress, All Ships, Individual and Group  
DSC call formats are supported. There are thirty two memories for storing  
incoming DSC calls and thirty two for your personal DSC call directory.  
Other features include all channel scanning, priority channel scanning,  
memory channel scanning, one button instant access to channel 16 and an  
alphanumeric keypad on the microphone.  
SX 35 DSC  
5
LICENSE INFORMATION  
Your SX 35 DSC complies with European Standard EN-301 025-1 v1.1.2.  
Users must know and comply with all applicable rules and regulations for  
the country or countries having jurisdiction over waters where your trans-  
ceiver is operated. Depending upon national regulations, a station license  
may be required for a VHF transceiver and an operator license or permit  
may be required for an individual to operate a VHF transceiver.  
Prior to using your SX 35 DSC inquire with your national radio communi-  
cation authorities.  
United Kingdom  
The Radiocommunications Agency, an Executive Agency of the Department  
of Trade and Industry, is responsible for the management of the nonmili-  
tary radio spectrum in the UK.  
License information and application forms are available on their web site:  
Direct inquiries to:  
Radiocommunications Agency (RA)  
Wyndham House  
189 Marsh Wall  
London E14 9SX  
Tel: 020 7211 0211  
The minimum Certificate of Competence that is required for use of a ship  
portable radio is the Short Range Certificate. This certificate covers use of  
both standard VHF and VHF/DSC equipment under the Global Maritime  
Distress and Safety System in sea area A1.  
The training and examinations for these certificates are carried out by:  
Royal Yachting Association  
RYA House  
Romsey Road,  
Eastleigh  
Hampshire SO5 4YA  
Tel: 023 8062 7400  
6
SX 35 DSC  
Digital Selective Calling (DSC) Capability  
You must obtain a nine-digit maritime mobile service identity (MMSI) and  
program it into the unit before you transmit. To obtain an MMSI, you will  
be asked to provide certain information about your ship. It is important  
that you obtain an MMSI because National Coast Guards and other search  
and rescue (SAR) agencies use this information to help speed search and  
rescue operations.  
Required License Information  
The following information pertaining to your transceiver is necessary if com-  
pleting a station license application  
Output Power............................................... 1 Watt (low) and 25 Watts (high)  
Emission ................................................................................16K0F3E, 16K0G3E  
Frequency Range ......................................................... 156.025 to 157.425 MHz  
UK M .........................................................................................157.850 MHz  
UK M2 .......................................................................................161.425 MHz  
Meets Essential Requirements of RTTE DIRECTIVE (Declaration of Confor-  
mity)  
Equipment Required  
The minimum equipment required for two way voice and DSC VHF radio  
communication with vessels and shore stations includes:  
VHF radio communication transmitter and receiver designed and ap-  
proved for marine VHF communication use.  
VHF antenna and connecting cable. Use a good quality unity gain an-  
tenna for best range performance.  
Power source suitable for the VHF transmitter and receiver.  
For Digital Selective Calling (DSC) VHF communication radios, con-  
nection to a GPS receiver that provides latitude and longitude coordi-  
nates and UTC time for distress messages.  
Equipment Supplied  
SX 35 DSC Marine VHF Transceiver.  
Microphone with alphanumeric keypad.  
Mounting Bracket with knobs.  
Power Cable with in-line fuse (6.3 Amp).  
NMEA Data Cable.  
Optional Equipment  
Flush Mounting Kit.  
SX 35 DSC  
7
BASIC RADIO COMMUNICATION PROCEDURES  
Distress or emergency calls may be made either manually or automatically.  
Sending distress calls automatically uses the Digital Selective Calling (DSC)  
functions of your transceiver and requires an operating and properly con-  
nected navigation receiver. The following procedures are for sending voice  
distress messages manually. Sending an automatic distress call is described  
in the DSC section of this manual.  
Using Channel 16  
Channel 16 is the Calling and Distress channel. An emergency may be de-  
fined as a situation that threatens human life or property. In such situa-  
tions, make sure your transceiver is turned On and set the channel selector  
to Channel 16. Then use the following procedure to make a distress call.  
The total transmission should not exceed 1 minute.  
1. Press the microphone Push To Talk button. Speak slowly and clearly  
into the microphone: “Mayday, Mayday, Mayday, this is your  
vessel’s name, your vessel’s name, your vessel’s name”.  
2. Then repeat once: “Mayday, your vessel’s name”.  
3. Continue by reporting your position in latitude and longitude or by  
reporting your bearing (true or magnetic, specify which) and dis-  
tance from a prominent or well known landmark, geographic fea-  
ture or aid to navigation.  
4. Explain the nature of your emergency (fire, sinking, collision,  
grounding, health condition, injury, etc.).  
5. Report the kind of assistance you require (fire, medical aid, pumps,  
etc.).  
6. State the number of people aboard and the condition of any injured.  
7. Estimate the seaworthiness and condition of your vessel.  
8. Describe your vessel: length, type, color and any distinguishing fea-  
ture.  
9. End the message by saying “Over”. Release the Push To Talk but-  
ton and listen for a reply.  
10. If there is no reply, repeat the above message procedure. If there is  
still no response, try another channel.  
8
SX 35 DSC  
Calling Another Vessel  
Channel 16 may be used to establish initial contact with another vessel.  
However, its most important use is for voice emergency messages. Chan-  
nel 16 must be monitored at all times except when engaged in actual com-  
munication on another channel. Channel 16 is monitored by international  
search and rescue (SAR) authorities, National Coast Guards and by other  
vessels. Use of Channel 16 for calling or hailing must be limited to initial  
contact only. Calling should not exceed 30 seconds and may be repeated 3  
times at 2 minute intervals.  
Prior to making contact with another vessel, determine which channel will  
be used for continued communication after the initial contact. Channels 68  
and 72 (see Channel Assignment tables) are two channels available for non-  
commercial (recreational) communication. Monitor the desired channel for  
traffic and, when clear, switch to Channel 16 to make initial contact.  
Listen for traffic on the Calling Channel (16). If clear, press the Push To Talk  
(PTT) button on the microphone. Speak the name of the vessel you are  
calling followed by “this is” and the name of your vessel and your call sign.  
Release the PTT and listen for a reply. When the other vessel returns your  
call, acknowledge the call with “go to”, the number of the new channel and  
“over”. Switch to the new channel and listen for traffic. If necessary, wait  
for traffic to clear, and then call the other vessel. As communication pro-  
ceeds, end each transmission with “over”. When communication with the  
other vessel is completed, end the last transmission with your call sign and  
the word “out”. It is not necessary to end each transmission with your call  
sign, just give your call sign at the beginning and end of each contact.  
Remember to switch to Channel 16 when not actively communicating on  
another channel.  
Telephone Calls  
You may use your SX 35 DSC transceiver to make telephone calls to per-  
sons on shore. To do so requires the services of marine operators who oper-  
ate on designated Public Correspondence channels. There are several chan-  
nels designated for this type of traffic and to determine the channel being  
used in your area, ask someone with local knowledge, contact a Harbor  
Master or other marine authority.  
SX 35 DSC  
9
Call the marine operator and identify yourself with your vessel’s name.  
Normally you contact a marine operator on their working channel rather  
than making initial contact on Channel 16. The marine operator will ask for  
your intentions and establish a payment method for the call (collect, credit  
card, etc.). When arrangements are complete, your radio communication  
will be patched into the telephone line. In conversing with a person on the  
phone it is important to use normal radio communication procedures. You  
should say “over” and release the PTT button at the end of each transmis-  
sion. Both parties cannot speak simultaneously as on normal telephone calls.  
Usually there is a fee for marine operator services which is charged in addi-  
tion to any other charges associated with the call.  
Prohibited Communication  
The following communications are prohibited by regulations and violators  
are subject to penalties.  
False distress or emergency messages (including false DSC distress).  
Messages to “any vessel” except in emergencies and radio tests.  
Messages to or from a vessel on land.  
Transmission while on land.  
Obscene, indecent, or profane language.  
10  
SX 35 DSC  
INSTALLATION  
Transceiver  
Your SX 35 DSC Transceiver is designed to withstand the rigors of the ma-  
rine environment. However, selecting a mounting location affording some  
protection from the elements will prolong the life of connectors, controls  
and the liquid crystal display (LCD).  
Select a location within easy reach and view of the operator and away from  
your vessel’s compass. Locate the microphone to avoid entanglement with  
steering or engine controls, both when in use and when stowed. Also, con-  
sider routing of antenna, power and NMEA interface cables. Mount the  
transceiver securely to a solid surface.  
Antenna  
Proper installation of a quality VHF antenna is very important to reliable  
radio communication. A good quality unity gain antenna is recommended  
for maximum range performance. In general, antennas should be located  
as high as practical and separated as much as possible from other antennas  
and structures. The minimum distance to other objects is 1 meter. Route  
the antenna cable away from other electronic equipment and do not bundle  
the antenna or power cable with other wiring, especially transducer cables  
for depth sounders and fish finders. For cables longer than 10 meters, RG-  
8/U coaxial cable must be used. Mount the antenna and install the  
connector(s) in accordance with manufacturers instructions. Connect the  
antenna cable to the RF output connector on the rear panel of the trans-  
ceiver.  
Power Connection  
CAUTION  
Reverse polarity connections can damage your transceiver  
The power cable for you transceiver must be connected to the ships main  
power buss. Use the 6.3 Amp in-line fuse provided. Connect the Red wire  
to the positive (+) terminal and the Black wire to the negative (—) terminal.  
Connect the barrel terminals on the power cable to the matching color wires  
and terminals extending from the rear panel of the transceiver.  
SX 35 DSC  
11  
NMEA Cable  
In order for the position reporting features of your SX 35 DSC transceiver to  
function, an operating GPS navigation receiver must be connected to your  
transceiver. The supplied data cable plugs into the 8 pin connector on the  
transceiver’s rear panel and the other end connects to the NMEA data out-  
put from your GPS navigation receiver. Your GPS must output the $GPRMC  
NMEA data sentence. Refer to your navigation receiver manual for infor-  
mation about its NMEA output settings and connections.  
External Speaker Connection  
Provision for connecting and external speaker is provided on the rear panel.  
Use an 8 Ohm speaker rated for at least 3 Watts and suitable for the environ-  
ment at the chosen location.  
Rear Panel Connectors  
Data Connector  
External Speaker Connector  
(Rear Panel)  
(Rear Panel)  
1
2
3
4
NMEA Rx (+) Brown  
NMEA Rx (–) Red  
NMEA Tx (+) Orange  
Ground/Tx (–) Shield  
3.5 mm Phone plug  
1
7
8
4
Tip  
Audio Out (+)  
Body Audio Out (–)  
5
6
7
8
Clock  
Reset  
PDI  
Green  
Blue  
Gray  
PDO  
Purple  
Pins 3 & 4 reserved for DSC/PC printer interface  
Pins 5~8 reserved for Flash programmer  
Antenna Connector  
The transceiver is fitted with a type SO 239 female connector which mates  
with a PL 259 male connector supplied with VHF marine antennas.  
12  
SX 35 DSC  
OPERATION  
General  
Your SX 35 DSC is an advanced marine VHF communication transceiver  
offering the safety and convenience of Digital Selective Calling in addition  
to all the useful features found in the best conventional VHF radios.  
Display and Controls  
The transceiver is operated using the front panel controls, the keypad, the  
Push To Talk (PTT) button and a keypad on the microphone. The 4-line  
LCD displays the current operating status, menus for selecting functions,  
and settings for optional features. The microphone has a keypad for chang-  
ing channels and selecting functions.  
Internal Speaker  
LCD Display  
Channel/data Selector  
SELECT  
VOL  
SQ  
MENU  
HI/LO  
SCAN  
END  
16  
DISTRESS  
LIFT HERE  
EXIT  
SX 35  
DSC  
ENT  
MEM  
CALL  
OFF  
Microphone  
Cable Entry  
Emergency Button  
Under Cover  
Keypad  
Squelch Control  
Volume Control  
SX 35 DSC  
Frequency Bank  
Annunciators  
USA INT CAN  
4 lines, 11 characters each  
for alphanumeric information  
Channel  
Number  
Liquid Crystal Display  
SX 35 DSC  
13  
Basic Operation  
Power On/Off  
Power to the transceiver is controlled with the VOLume knob. When the  
VOL knob is in the full CCW position the unit is turned Off.  
To turn the transceiver On:  
Rotate the VOL knob CW until it clicks over the detent. The LCD back-  
light illuminates and the Power-On screen appears.  
INT  
SX 35 DSC  
CODE 000.00  
Power-On Screen  
After approximately two seconds, the Normal Communication screen ap-  
pears in the display.  
INT  
INT  
16 PRI. HI  
MEM CHANNEL  
N 28°04.814  
W 83°42.169  
16 PRI. HI  
MEM CHANNEL  
––°––.–––  
––°––.–––  
Normal Com Screen  
with GPS Connected  
Normal Com Screen  
w/o GPS Connected  
To turn the transceiver Off:  
Rotate the VOL knob CCW until it clicks over the detent to the OFF  
position.  
Volume and Squelch  
The VOLume and SQuelch controls have concentric knobs. The outer ring  
knob controls squelch and the inner knob controls volume. They are inde-  
pendent controls but work together to control audio output from the speaker.  
The volume control sets the loudness of sound from the speaker and the  
squelch control is used to mute background noise when no received signals  
are present.  
14  
SX 35 DSC  
To properly set the VOL and SQ controls:  
Rotate the SQ control fully CCW.  
Rotate the VOL control CW until background noise is plainly heard.  
Slowly rotate the SQ control CW until the noise is muted (squelched).  
Then adjust the control slightly more CW (approximately 1/8 turn). Use  
care not to set the SQ control more CW than necessary or weak signals  
may not be heard.  
Some channels exhibit more background noise than others, so it may be  
necessary to readjust the squelch setting when changing channels or when  
scanning.  
Channel Selection  
When the transceiver is turned On, the Primary Calling Channel (channel  
16) is selected.  
There are three ways to change channels:  
Rotate the SELECT knob, press and hold the  
or  
keys, or di-  
EXIT  
ENT  
rectly enter the channel number using the numeric keys on the micro-  
phone. The and keys will always change channels except when  
ENT  
EXIT  
being used to enter or edit a directory page.  
Channel Banks  
Your SX 35 DSC is designed for use with the International VHF marine  
channel frequencies plus authorized local channel frequencies. Only au-  
thorized dealers can program other approved country channels, where spe-  
cifically allowed by government regulations, by using the 8 pin com con-  
nector.  
Keypad, Transceiver  
A tone is emitted each time a key is pressed. A three beep error tone is  
emitted when a key is not allowed. Some functions require a key to be  
pressed and held. After the hold period times out, a second tone is emitted  
as the function is entered. The basic purpose for each key follows. Detailed  
usage of keys is described in operating procedures for the transceivers vari-  
ous functions.  
SX 35 DSC  
15  
MENU Opens menus to select optional settings to personalize your  
transceiver’s operation.  
HI/LO  
Use to toggle transmitter power between 25 watts and 1 watt out-  
put. Certain channels are restricted to 1 watt maximum power and  
will cause the error beep if the HI/LO key is pressed.  
END  
Cancels DSC calls and Emergency/Distress calls.  
16  
Selects the Primary Calling Channel 16 or the last channel used. Also,  
cancels DSC and Emergency/Distress calls.  
ENT  
SCAN  
MEM  
Used to complete editing or selection of options from menus. Use  
to delete channels in All Scan function.  
Can be used alone or with the MEM key to select Priority Scan,  
Memory Scan or All Scan.  
Stores channels in the scan memory bank, and when used with the  
SCAN key, starts Memory Scan.  
CALL Initiates DSC operation screens.  
Keypad, Microphone  
The microphone keypad is used to change channels by directly entering the  
WXYZ  
actual channel number with the  
through  
keys. The  
or  
ENT EXIT  
0
9
keys step or scroll to a new channel. The microphone keys are used to enter  
alphanumeric characters and symbols shown in the following chart.  
Microphone Keys  
ABC DEF GHI JKL MNO PQRS TUV WXYZ  
0
1
2
3
4
5
6
7
8
9
Alphanumeric Character Sequence  
0
1
-
,
.
/
A
B
C
?
D
E
F
!
G
H
I
:
4
J
K
L
#
5
M
N
O
'
P
Q
R
S
7
T
U
V
&
8
W
X
Y
Z
Space  
(
)
%
2
3
6
9
16  
SX 35 DSC  
OPERATING PROCEDURES  
Primary Calling Channel  
VHF Channel 16 (156.8 MHz) is the Distress Safety and Primary Calling  
Channel. All vessels, not actively engaged in communication, are required  
to maintain a listening watch on Channel 16.  
Transmitting  
The transmitter is activated, for normal voice communications, by pressing  
the Push To Talk (PTT) button on the microphone. Always listen for mo-  
ment on a channel before transmitting. If the channel is busy, do not trans-  
mit until the channel is clear. For DSC calling and Distress calls, the trans-  
mitter is activated automatically during the appropriate operating proce-  
dure. After DSC contact is established, proceed as in normal voice commu-  
nication. Continuous transmitter operation is limited to five minutes and  
the transmitter will automatically stop.  
To establish normal voice communication:  
16  
Press the  
key to select the Primary Calling Channel. The Pri-  
mary Calling Channel is 16. The Primary Calling Channel number ap-  
pears in the upper left corner of the display.  
Listen on the Primary Calling Channel to make sure the channel is clear.  
Press the PTT button. Speak directly into the microphone in a normal  
tone of voice --clearly--distinctly. Say “(name of vessel being called)  
THIS IS (your vessel’s name and call sign).”  
Release the PTT button and listen for a reply.  
Once contact is made on the Primary Calling Channel, each vessel must  
switch to a working channel to continue conversation. Refer to the chan-  
nel chart for proper usage.  
After communication is completed, each vessel must give its call sign  
or vessel name and switch to the Primary Calling Channel and resume  
listening watch.  
SX 35 DSC  
17  
Working Channel Recall  
Rather than using the SELECT knob or microphone keys to change chan-  
nels, this feature allows quick switching between the last working channel  
and the current primary channel.  
To quickly switch between the last working channel and the Primary Call-  
ing Channel:  
Use the SELECT knob or microphone keys to select a working channel,  
such as channel 68.  
16  
Press the  
key momentarily. The current primary channel num-  
ber appears in the channel number display.  
Press the 16 key again momentarily. The working channel number  
appears in the display. Each time the key is pressed, channel selection  
toggles between the primary channel and the working channel.  
Transmitter Power Setting  
The transmitter has two power settings, 25 watts or 1 watt, which are indi-  
cated by HI or LO appearing in the upper line of the display. The normal  
power setting is HI for all channels where 25 watts is allowed. Use the 1  
watt setting for communication with nearby vessels (bridge-to-bridge) or  
facilities (drawbridges).  
HI/LO  
Press the  
key to toggle transmitter power between 25 watts and  
1 watt output.  
SPECIAL NOTE  
Channels 15 and 17 are restricted to 1 watt maximum power and will  
cause the error beep if the HI/LO key is pressed.  
Channel Scanning  
There are three channel scanning modes; Priority Scan, All Scan and Memory  
Scan. In the Priority Scan mode, Channel 16 is checked for activity every 2  
seconds, even if, the scan is halted by traffic on a working channel. When  
scanning is halted by traffic, the scan pauses while the channel is active.  
Scanning resumes, after a brief delay when the channel is clear. If the PTT  
is pressed, in reply to a received signal, scanning is cancelled.  
18  
SX 35 DSC  
Priority Scan  
The Priority Scan function scans the Primary Calling Channel and the last  
selected working channel.  
To select Priority Scan:  
Press the SCAN key. PSCAN appears in the upper line of the display  
and the two scanned channel numbers appear alternately in the dis-  
play.  
INT  
INT  
PSCAN HI  
08Dec12:05P  
N 28°04.814  
W 83°42.169  
PSCAN HI  
08Dec12:05P  
N 28°04.814  
W 83°42.169  
Priority Scan Sequence  
To exit Priority Scan:  
SCAN  
16  
Press the  
key or press the  
key.  
All Scan  
The All Scan function scans all channels except channel 70. Channel 70 is  
the Digital Selective Calling (DSC) channel. Voice traffic is not permitted  
on this channel. If noisy or busy channels interfere with scanning, the inter-  
fering channels may be temporarily removed from the scan sequence.  
To select All Scan:  
SCAN  
Press and hold the  
key for 2 seconds. ALLSCAN appears in the  
upper line of the display. The scanned channel numbers appear in se-  
quence in the channel number display.  
To Exit All Scan:  
SCAN  
16  
Press the  
key or press the  
key.  
To delete channels from the scan sequence:  
ENT  
Press and hold the  
key while the scan is halted on the offending  
channel. Turning the transceiver Off and On, restores all channels to  
the scan sequence.  
SX 35 DSC  
19  
Memory Scan  
Memory Scan allows the user to create and scan a bank of preferred chan-  
nels. Channels may be added to or removed from the memory channel  
bank as desired. Memory channels are stored individually and may be de-  
leted individually, or the entire bank may be deleted. If the PTT button is  
pressed, the transceiver exits scanning and normal communication is re-  
sumed.  
To create or add channels to the memory channel bank:  
Press the MEM key. The Memory Scan channel bank appears in lower  
two lines of the display. If no channels have been previously added to  
the bank, the Primary Calling Channel (16) is displayed. Otherwise, up  
to six channel numbers appear. A plus sign (+) at the end of the lower  
line indicates more than six channels are stored in the bank. Press the  
MEM key again to advance to the next page of channels. The memory  
channel bank can hold all usable voice communication channels.  
INT  
INT  
INT  
ADD/DELETE  
MEM CHANNEL  
16  
ADD/DELETE  
MEM CHANNEL  
06 09 16  
ADD/DELETE  
MEM CHANNEL  
72 78  
22 67 68 +  
Memory Scan Bank Memory Scan Bank Memory Scan Bank  
Default Page Page Full Next Page  
Rotate the SELECT knob or microphone keys to select a desired chan-  
nel to add to the memory channel bank.  
MEM  
Press and hold the  
key for about two seconds. The selected chan-  
nel is stored and the channel number appears in the memory channel  
bank. Repeat the select and store process to add more preferred chan-  
nels. As each channel is added, the existing channels in the bank shift as  
necessary to display the new channel number in the bank.  
When in the normal communication mode, as channels are selected,  
MEM CHANNEL appears in the second line of the display if the se-  
lected channel is stored as a memory channel.  
INT  
16 PRI. HI  
MEM CHANNEL  
N 28°04.814  
W 83°42.169  
Memory Channel Display  
20  
SX 35 DSC  
To remove channels from the memory channel bank:  
MEM  
Press the  
key. The Memory Scan channels appear in the display.  
Rotate the SELECT knob or use microphone keys to select a displayed  
channel.  
Press and hold the MEM key for about two seconds. The selected chan-  
nel is deleted and the channel number is removed from the memory  
channel bank.  
To remove all channels from the memory channel bank:  
Turn the transceiver Off.  
MEM  
Press and hold the  
key while turning the transceiver On. The  
memory channel bank is erased except for Channel 16 which remains.  
To start Memory Scan:  
MEM  
Press the  
display.  
key. The Memory Scan channel bank appears in the  
SCAN  
Press the  
key. MSCAN appears in the upper line of the display.  
The scanned channel numbers appear in sequence in the channel num-  
ber display.  
Menu Functions  
Menus are used to customize optional settings to individual preference. The  
multilevel menu system is a list of topics that, when selected individually,  
offer options or additional related topics from which to choose. Changes to  
menu settings are stored and remain in force until changed again.  
To navigate through menus:  
Press the MENU key. The Main Menu appears in the display. DIREC-  
TORY is always the first topic displayed on the Main Menu list.  
INT  
>DIRECTORY  
LAMP  
CONTRAST  
DATA SET  
Main Menu Topics  
SX 35 DSC  
21  
To select a topic in the menu list:  
Rotate the SELECT knob to move the cursor > to the desired topic.  
There are more topics than can be displayed at one time, so the list scrolls  
as the cursor is advanced beyond the top or bottom of the list.  
INT  
MMSID SET  
TIME SET  
NMEA SET  
>DIRECTORY  
More Main Menu Topics  
With the cursor on the desired menu topic, press the ENT key. Op-  
tions or edit settings for the topic appear in the display.  
Use the SELECT knob to move the cursor to the desired setting.  
Press the ENT key to store the new setting.  
If you change your mind:  
Before pressing the ENT key while in an editing mode, press the MENU  
key to backup to the next higher menu level.  
To exit the menus and return to communication functions:  
16  
Press the  
key. If the ENT key was not pressed to store a new  
value, no changes are made.  
Main Menu Topics  
DIRECTORY  
The DSC Calling Directory is a list of names and corresponding MMSID’s  
that you enter and store for making DSC calls (32 ID’s maximum). Entries  
to the list can be added or edited as necessary to keep your directory cur-  
rent.  
To add a name and MMSID to the directory:  
Press the MENU key. The DIRECTORY topic appears in the display.  
Press the ENT key. If the directory is empty, the screen appears blank  
except for the channel number. If previous entries appear, move the  
cursor to an empty line. If no empty line is found, the directory is full  
and a previous entry must be overwritten.  
22  
SX 35 DSC  
ENT  
Press the  
key. The DIRECTORY NAME/ID screen appears with a  
blinking cursor next to the name line.  
INT  
DIRECTORY  
NAME/ID  
Name and ID Screen  
ENT  
Press the  
or  
key to move the cursor to the first character of  
ENT  
the name line.  
SPECIAL NOTE  
Characters are entered in the name and ID fields using either the  
SELECT knob or the microphone keys.  
All letters in the alphabet, a space, and the numbers 0~9, plus punctuation  
marks and some symbols may be used. The space character follows Z in the  
alphabet when using the SELECT knob. Only numbers are allowed in the  
ID field.  
The following table shows the characters that may be entered in the name  
field using the microphone keys.  
Microphone Keys  
ABC DEF GHI JKL MNO PQRS TUV WXYZ  
0
1
2
3
4
5
6
7
8
9
Alphanumeric Character Sequence  
0
1
-
,
.
/
A
B
C
?
D
E
F
!
G
H
I
:
4
J
K
L
#
5
M
N
O
'
P
Q
R
S
7
T
U
V
&
8
W
X
Y
Z
Space  
(
)
%
2
3
6
9
Several additional special characters are available when entering the name  
using the SELECT knob.  
Use the SELECT knob or microphone keys to select the desired letter,  
number or symbol for the first character.  
SX 35 DSC  
23  
ENT  
If using the SELECT knob, press the  
or  
key after each char-  
ENT  
acter is selected to enter the character and advance the cursor to the next  
character position.  
If using the microphone keys, press the appropriate key repeatedly un-  
til the desired character is displayed at the cursor position. Then press  
the appropriate key for the next character. The cursor automatically  
moves to the new position. When entering the same character in two or  
more successive character positions, use the ENT or  
keys to ad-  
ENT  
vance the cursor.  
Use the  
key if necessary to backspace the cursor.  
EXIT  
Up to ten characters are allowed in the name, but only one is required.  
Enter enough characters to positively identify the entry.  
After the last character in the name is selected and entered, press the  
ENT  
or  
key again. The cursor moves to the MMSID line.  
ENT  
ENT  
Press the  
or  
key to move the cursor to the first digit position  
ENT  
in the MMSID line.  
Enter the first number in the MMSID. Only numbers 0~9 are allowed  
in the MMSID.  
ENT  
Press the next microphone number key or press the  
the selected digit and move the cursor to the next digit position.  
key to store  
Continue to select and store digits until the complete MMSID is en-  
tered. After the last MMSID digit is entered, the cursor returns to the  
name line of the display.  
If the name and ID are correct for this directory entry, press the MENU  
key to save the data and exit. The directory list appears in the display  
showing the new entry by name only. The MMSID does not appear in  
the directory list.  
To edit an existing name or MMSID in the directory:  
Press the MENU key. The DIRECTORY topic appears in the display.  
ENT  
Press the  
key. DSC Calling Directory entries appear in the dis-  
play. The directory stores a maximum of 32 entries which are displayed  
four at a time.  
24  
SX 35 DSC  
Use the SELECT knob to move the cursor to the entry name for edit-  
ing.  
ENT  
Press the  
key. The DIRECTORY NAME/ID screen appears pre-  
senting the name and MMSID for the selected directory entry. The blink-  
ing cursor is positioned at the start of the entry’s name.  
ENT  
Press the  
or  
key. The cursor becomes an underline instead  
ENT  
of a blinking square and moves to the first character position.  
Use the SELECT knob to move the underline cursor to the character  
position needing change.  
ENT  
Press the  
or  
key. The blinking cursor appears.  
ENT  
Use the SELECT knob or microphone keys to change the contents of  
the character to the new value.  
When new value is correct, press the ENT key or the  
key. If more  
or  
ENT  
characters in the same line need changing, use the ENT or  
ENT  
EXIT  
key to move the blinking cursor to the next desired character. If no  
more changes are desired on the same line, use the MENU key to move  
the cursor back to the start of the line.  
When both the name and MMSID are correct, press the MENU key to  
save the data and exit to the directory listing.  
LAMP  
Allows adjustment of illumination for the LCD display, keypad and micro-  
phone keypad.  
Press the MENU key. Menu topics appear in the display.  
Use the SELECT knob to position the cursor on the LAMP topic.  
ENT  
Press the  
display.  
key. The BRIGHTNESS adjust screen appears in the  
INT  
BRIGHTNESS  
________  
LO  
HI  
SX 35 DSC  
25  
Brightness Control  
Use the SELECT knob or microphone keys 0~3 to change the setting.  
ENT  
Press the  
or MENU key to store the setting and exit.  
CONTRAST  
Allows adjustment of LCD display contrast for best readability in varying  
lighting conditions.  
Press the MENU key. Menu topics appear in the display.  
Use the SELECT knob to position the cursor on the CONTRAST topic.  
ENT  
Press the  
display.  
key. The CONTRAST adjust screen appears in the  
INT  
CONTRAST  
_____  
LO  
HI  
Contrast Control  
Use the SELECT knob or microphone keys 0~7 to change the setting.  
Press the ENT or MENU key to store the setting and exit.  
DATA SET  
Provides On/Off control for display of Lat/Lon, Date/Time, Speed/Course,  
and Manual Lat/Lon. Also, provides for entry of Manual Lat/Lon coordi-  
nates.  
Press the MENU key. Menu topics appear in the display.  
Use the SELECT knob to position the cursor on the DATA SET topic.  
Press the ENT key. The Data Set menu selections appear in the dis-  
play.  
26  
SX 35 DSC  
INT  
≥LLPOSITION  
TIME/DATE  
SOG/COG  
MANUAL LL  
Data Set Selections  
Use the SELECT knob or or to select either LLPOSITION,  
ENT  
EXIT  
TIME/DATE or SOG/COG. MANUAL LL is described separately.  
ENT  
Press the  
key. The On/Off option is displayed.  
Use the SELECT knob or any microphone key to select either On or  
Off.  
ENT  
Press the  
key to store the selection and exit to the previous menu.  
The MANUAL LL data item has 3 options, On/Off/Set. The Set option is  
used to manually enter your approximate Lat/Lon position and time of day  
for distress messages if your GPS is not connected or not functioning. If  
Manual Lat/Lon is turned On, it overrides your GPS Lat/Lon position. Be  
sure Manual Lat/Lon and time of day are correctly entered before turning  
the function On. Time of day is entered as your local time in either 12 hour  
or 24 hour format. Its is important that your local time offset from Univer-  
sal Coordinated Time (UTC) is set correctly. See the TIME SET topic on the  
Main Menu.  
To set Manual Lat/Lon:  
Press the MENU key. Menu topics appear in the display.  
Use the SELECT knob to position the cursor on the DATA SET topic.  
ENT  
Press the  
play.  
key. The Data Set menu selections appear in the dis-  
INT  
≥LLPOSITION  
TIME/DATE  
SOG/COG  
MANUAL LL  
Data Set Selections  
Use the SELECT knob or  
or  
to select MANUAL LL.  
EXIT  
ENT  
SX 35 DSC  
27  
ENT  
Press the  
key. The MANUAL LL menu appears in the display.  
INT  
MANUAL LL  
ON  
OFF  
>SET  
Manual LL Menu  
Use the SELECT knob to select SET on the menu.  
Press the ENT key. The SET LL/TIME screen appears.  
INT  
SET LL/TIME  
≥N ° .  
W ° .  
: LOC  
Manual LL Entry  
ENT  
Press the  
or  
key to place the blinking cursor on the first  
ENT  
character (N or S) in the Latitude entry line.  
Use the key to toggle N or S to select a hemisphere (North or South)  
EXIT  
designator.  
ENT  
Press  
or  
to move the blinking cursor to the next character in  
ENT  
the Latitude entry.  
Use the SELECT knob or the microphone keys 0~9 to enter the correct  
Latitude value in degrees and minutes. When Latitude is complete, the  
cursor moves to the Longitude line.  
ENT  
Press the  
or  
key to place the blinking cursor on the first  
ENT  
character (E or W) in the Longitude entry line.  
Use the key to toggle E or W to select a hemisphere (East or West)  
EXIT  
designator.  
Press ENT or  
to move the blinking cursor to the next character in  
ENT  
the Longitude entry.  
28  
SX 35 DSC  
Use the SELECT knob or the microphone keys 0~9 to enter the correct  
Longitude value in degrees and minutes. When Longitude is complete,  
the cursor moves to the Time entry line.  
Press ENT or  
to move the blinking cursor to the first character in  
ENT  
the Time entry.  
Use the SELECT knob or the microphone keys 0~9 to enter the correct  
time of day. LOC appears at the end of the Time line indicating entry  
must be local time.  
Enter your local time in hours and minutes. Use 12 hour AM/PM for-  
mat if a or p appear after the minutes characters. The SELECT knob or  
the microphone keys 0~9 toggle the a/p setting. If neither a or p appear  
in the Time line, enter your local time, hours and minutes, in 24 hour  
format.  
When Lat/Lon and Time values are correct, press the MENU key to  
return to the MANUAL LL menu page.  
To turn Manual Lat/Lon On of Off:  
Use the SELECT knob to select either On or Off on the MANUAL LL  
page.  
Press the ENT key to store the selection.  
16  
Press the  
key. The Main display appears. If Manual Lat/Lon is  
turned On, and manually entered values are stored, the Lat/Lon values  
appear in the lower two lines of the display. The M appearing at the end  
of the Longitude line indicates that Manual Lat/Lon is turned On. When  
Manual Lat/Lon is turned On, the manually entered position overrides  
any Lat/Lon position from a navigation receiver.  
MMSID SET  
Provides for entry of the 9 digit MMSI for your vessel which must be en-  
tered in order to make DSC calls. MMSI must be obtained from govern-  
ment communication authorities or authorized agents.  
CAUTION NOTE  
Only three entry attempts are permitted. A warning is displayed after the  
third attempt and MMSID entry is blocked. CALL YOUR DEALER FOR  
ASSISTANCE.  
To enter your MMSI number:  
Press the MENU key. Menu topics appear in the display.  
SX 35 DSC  
29  
Use the SELECT knob to position the cursor on the MMSID SET topic.  
ENT  
Press the  
key. The MMSID TYPE menu appears in the display.  
INT  
MMSID TYPE  
≥SHIP ID  
GROUP ID  
MMSID Type Select  
Use the SELECT knob to select SHIP ID on the menu.  
ENT  
Press the  
key. The MMSID SET screen appears in the display.  
INT  
MMSID SET  
000000000  
PRESS ENTER  
TO CHANGE.  
MMSID Set Screen  
ENT  
Press the  
tion.  
key. The blinking cursor appears at the first digit posi-  
Use the SELECT knob or the microphone keys 0~9 to enter your offi-  
cial MMSI number.  
ENT  
When the last digit is selected, press the  
or  
key. 3 to GO  
ENT  
appears (if this is the first MMSI entry) in the lower line of the display.  
ENT  
Press the  
or  
key again. STORED OK appears briefly in the  
ENT  
lower line of the display completing the entry.  
Press the 16 key to return to the Main display.  
Follow the above procedure to enter your Group ID number. Group ID  
entry attempts are not limited in number.  
TIME SET  
Allows selection of either 12 or 24 hour time format and provides entry of  
local time offset from Universal Coordinated Time (UTC), sometimes called  
Greenwich Mean Time (GMT). UTC is the time at the Prime Meridian, or  
zero degrees (0°) Longitude which passes through Greenwich, England.  
Press the MENU key. Menu topics appear in the display.  
30  
SX 35 DSC  
Use the SELECT knob to position the cursor on the TIME SET topic.  
ENT  
Press the  
key. The TIME FORMAT menu appears in the display.  
INT  
TIME FORMAT  
>12 HR.  
24 HR.  
88:88 +  
Format Selection  
Use the SELECT knob to select the desired format, either 12 HR or 24  
HR.  
ENT  
Press the  
key. The TIME OFFSET menu appears in the display.  
INT  
TIME OFFSET  
>+00.0  
88:88  
Time Offset Selection  
Use the SELECT knob to set the time difference from the Prime Merid-  
ian to your location. If you are West of the Prime Meridian, select a  
negative (—) value. If you are East of the Prime Meridian, select a posi-  
tive (+) value. Time offset values from 0 to 12 hours plus or minus may  
be entered in 1/2 hour increments. Obtain the time offset value from  
your GPS navigator.  
ENT  
When your selection is complete, press the  
ting and exit the menu.  
key to store the set-  
NMEA SET  
Allows NMEA sentences from navigation equipment manufactured to ear-  
lier versions of the NMEA standard to provide Lat/Lon position coordi-  
nates and UTC time.  
Press the MENU key. Menu topics appear in the display.  
Use the SELECT knob to position the cursor on the NMEA SET topic.  
ENT  
Press the  
display.  
key. The NMEA CHECKSUM menu appears in the  
SX 35 DSC  
31  
DSC OPERATION  
The Digital Selective Calling (DSC) functions of your SX 35 DSC transceiver  
add convenience and safety to your VHF communication capability. DSC  
allows you to contact other DSC equipped vessels and shore stations by  
selecting their names from your personal call directory, choosing a call type,  
and pressing a key. In an emergency, pressing one button will send your  
vessel ID and current position to search and rescue (SAR) authorities and  
other DSC equipped vessels. Distress calls are covered first. Then, normal  
calling procedures are described.  
Position reporting requires connection to an operating GPS navigation re-  
ceiver or manually entered Lat/Lon coordinates. If data from your GPS is  
lost, 3 quick error beeps are sounded and the following warning screen ap-  
pears in the display after 23.5 hours.  
INT  
16 PRI. HI  
--Jan88:88  
99°99.999  
999°99.999  
Set Manual Lat/Lon  
This warning screen reminds you to manually enter Lat/Lon coordinates.  
The old GPS coordinates are used for 23.5 hours if manual coordinates are  
not entered. See the MANUAL LL item of the DATA SET topic of the Main  
Menu.  
MMSID  
SPECIAL NOTE  
In order to use DSC functions, you must obtain a nine-digit maritime  
mobile service identity (MMSI) and program it into your transceiver be-  
fore you transmit.  
Prior to obtaining an MMSI, you will be asked to provide certain informa-  
tion about your vessel and communication equipment. Contact the govern-  
ment radio communication authorities of your country for licensing and  
MMSI information. It is important that you obtain an MMSI, because Na-  
tional Coast Guard authorities use this information to help speed search  
and rescue operations.  
The procedure for entering your MMSI is described in the MMSID Set topic  
of the Operating Procedures section.  
32  
SX 35 DSC  
Sending a Distress Call  
To make a distress call:  
Lift the red protective cover, then press and release the red button. The  
distress alert screen appears.  
INT  
DISTRESS!  
≥Undesign-  
ated.  
HOLD 3 SEC.  
Distress Alert Screen  
If time permits, use the SELECT knob to select the nature of distress.  
Otherwise, hold the red button (as soon as the button is pressed again,  
an intermittent acoustic alarm is sounded and the distress alert screen  
flashes until the DISTRESS is sent automatically, in about 3 seconds).  
Before the distress is sent, you may release the red button to reset the  
countdown timer. When the distress is sent, the sending distress call  
screen appears. The acoustic alarm goes steady-on and remains on un-  
til an acknowledgment is received or the acoustic alarm is cancelled.  
Nature of Distress  
Undesign-  
ated.  
Fire or  
Explosion.  
Flooding.  
Collision.  
Grounding.  
Listing or  
Capsizing.  
Sinking.  
Disabled  
& Adrift.  
Abandoning  
Ship.  
Piracy  
Man  
EPRIB  
Attack.  
Overboard.  
Emission.  
After selecting a nature of distress message, press and hold the red but-  
ton. The actions above are repeated.  
An alarm sounds and the following screen appears as your distress  
message is being transmitted.  
SX 35 DSC  
33  
INT  
TX  
HI  
SENDING  
DISTRESS!  
CALLING.  
Sending Distress Call  
The following screen appears indicating your distress message has been  
transmitted.  
INT  
DISTRESS!  
PRESS END  
TO CANCEL.  
WAITING....  
Distress Call Sent  
The DSC distress message is automatically sent on channel 70 and your  
transceiver is automatically set to Channel 16 in order to listen for, and re-  
spond to, voice replies from SAR authorities or other vessels which may  
have received your distress call. The alarm will sound every 2 minutes to  
remind you that a distress message is active. Unless canceled, the distress  
message is automatically retransmitted every 3 1/2 to 4 1/2 minutes.  
Re-transmissions of DSC distress calls are canceled automatically when a  
DSC acknowledgment is received from an authorized SAR coast station, or  
canceled manually by you.  
To manually cancel DSC distress retransmissions from your vessel:  
END  
Press the  
key. The DISTRESS CANCELED message appears in  
the display.  
INT  
DISTRESS  
CANCELED.  
Manual Distress Cancel  
If your DSC distress call is acknowledged (ACK) by a coast station, the  
DISTRESS! CANCELED. ACK RECEIVE screen appears in the display.  
34  
SX 35 DSC  
INT  
DISTRESS!  
CANCELED.  
CoastSta ID  
ACK RECEIVE  
Distress Acknowledged  
Establish voice contact with the coast station on Channel 16.  
Receiving Distress Calls  
Your SX 35 DSC transceiver may intercept distress messages sent by an-  
other vessel and/or acknowledgments (ACK) sent by a coast station to an-  
other vessel in distress. In such cases you should maintain a listening watch  
on channel 16 and standby to lend assistance. Your SX 35 DSC does not  
automatically reply to, or relay, distress or ACK or relay DSC calls.  
Distress sent by another vessel  
If your SX 35 DSC transceiver intercepts a distress call from another vessel,  
an alarm sounds and the following screen appears in the display.  
INT  
20:33 UTC  
Name or ID of  
Vessel in Distress  
ID323456789  
N 28°33.  
02 W 82°50+  
Distress Alert, page 1  
The screen presents, time of distress, MMSID of the distressed vessel, and  
Lat/Lon coordinates. The plus sign (+) indicates there is another page of  
information available. If invalid GPS or Time data is received, the Lat/Lon  
position shows ‘9’ in all digits and the time shows all ‘8’s.  
ENT  
Press the  
key to toggle between page 1 and page 2.  
INT  
Undesign-  
ated.  
DISTRESS  
02 ALERT +  
Distress Alert, page 2  
The nature of distress and ALERT call type appear on the second page.  
SX 35 DSC  
35  
Distress ACK sent to another vessel  
If your SX 35 DSC transceiver intercepts a distress ACK from a coast sta-  
tion, an alarm sounds and the following screen appears in the display.  
INT  
21:45 UTC  
Name or ID of  
Coast Station  
ID998765432  
N 29°06.  
03 W 82°50+  
Coast Station ACK to other vessel, page 1  
The screen presents time of ACK and Lat/Lon coordinates. The plus sign  
(+) indicates there is another page of information available.  
ENT  
Press the  
key to toggle between page 1 and page 2.  
INT  
EPRIB  
Emission.  
ID123456789  
03 ACK +  
Name or ID of  
Vessel in Distress  
Coast Station ACK to other vessel, page 2  
The distressed vessel’s MMSID and ACK appear on the second page. Main-  
tain a listening watch on channel 16 and standby to lend assistance.  
Distress Relay from another vessel  
If your SX 35 DSC transceiver intercepts a distress relay from another ves-  
sel, an alarm sounds and the following screen appears in the display.  
INT  
Name or ID of  
Vessel sending  
message  
04:16P  
ID323456789  
N 28°29.  
04 W 82°50+  
Distress Relay, page 1  
The screen displays, local time of distress, the MMSID of the vessel sending  
the relay message and Lat/Lon coordinates of the vessel in distress. The  
plus sign (+) indicates there is another page of information available.  
Press the ENT key to toggle between page 1 and page 2.  
36  
SX 35 DSC  
INT  
EPRIB  
Emission.  
ID123456789  
04 RELAY +  
Name or ID of  
Vessel in Distress  
Distress Relay, page 2  
The distressed vessel’s MMSID and RELAY call type appear on the second  
page.  
Your vessel does not re-send a distress relay message.  
Normal DSC Calls  
Your SX 35 DSC can transmit four types of DSC calls; Distress, All Ship’s,  
Individual, and Group. Except for Distress, each call type is subdivided  
into one or more priorities.  
All Ship’s type transmits two priorities: Urgency and Safety.  
Individual type transmits one priority: Routine.  
Group type transmits one priority: Routine.  
A normal DSC call may be originated from your vessel to another DSC  
equipped vessel or to a coast station, or you may reply to a DSC call sent by  
another vessel or a coast station. Outgoing calls are made either by select-  
ing a vessel or station name from your directory or by manually entering  
the vessel or station MMSID number.  
Replies to any incoming call type can be made directly from the call log.  
The call log (LAST CALL) holds thirty two entries and the last call received  
is on top of the list. If the call log is full, the oldest entry is lost.  
Individual DSC Call  
Individual calls can be made to another vessel or to a coast station. It is  
important to be able to differentiate between the two. When calling another  
vessel, the communication channel is specified in the call by the calling ves-  
sel. If communicating with a coast station, it is the coast station in its ac-  
knowledgment, that determines the channel. Your SX 35 DSC transceiver  
transmits Routine individual calls, but receives both Routine and Safety in-  
dividual calls.  
Directory Call  
Directory calls are made by selecting a vessel or station name from the call-  
ing directory. The calling directory holds thirty two of your previously  
entered names that you routinely contact during normal boating activities.  
SX 35 DSC  
37  
To make a directory call:  
CALL  
Press the  
key. The DSC calling menu appears in the display.  
Use the SELECT knob to select the DIRECTORY topic.  
INT  
LAST CALL  
>DIRECTORY  
ALL SHIP'S  
INDIVIDUAL  
DSC Directory  
CALL  
Press the  
key. The directory list appears in the display.  
Use the SELECT knob to select the desired vessel or station name.  
Note: The MMSID’s for each entry do not appear in the list.  
Use the microphone keys to select a working channel.  
CALL  
Press the  
play.  
key. The INDIVIDUAL call screen appears in the dis-  
INT  
INDIVIDUAL  
vessel name  
>ROUTINE  
PRESS CALL.  
Individual Call Screen  
CALL  
Press the  
key to send the call. DSC calls are made on channel 70.  
If you observe the display closely, you will see the channel number  
change to channel 70 momentarily and then revert to the selected work-  
ing channel.  
While waiting for acknowledgment from the called vessel,  
WAITING . . . . appears in the lower line of the display.  
INT  
INDIVIDUAL  
vessel name  
>ROUTINE  
WAITING....  
Waiting For Acknowledge  
When the called vessel acknowledges your call, an alert sounds and  
ACK RECEIVE appears in the lower line of the display.  
38  
SX 35 DSC  
INT  
16 PRI. HI  
vessel name  
>ROUTINE  
ACK RECEIVE  
Acknowledge Received  
Press the PTT button on the microphone to silence the alert and begin  
voice communication with the called vessel.  
END  
The  
key may be used to exit the DSC calling procedure at any  
time prior to sending the call.  
Manual Call  
The manual call procedure is used to make a DSC call to a vessel or station  
that is not listed in your calling directory. However, you must know the  
MMSID for the vessel or station.  
To make a manual DSC call:  
Press the CALL key. The DSC calling menu appears in the display.  
Use the SELECT knob to select the INDIVIDUAL topic on the menu.  
INT  
LAST CALL  
DIRECTORY  
ALL SHIP'S  
>INDIVIDUAL  
DSC Manual Call  
CALL  
Press the  
key. The SET CHannel/SET MMSID screen appears  
in the display.  
INT  
≥SET CH  
06 08 72 77  
SET MMSID  
Set Channel/Set MMSID  
Use the SELECT knob or microphone keys to select a working chan-  
nel. Four channel numbers appear in the display as suggested channels  
authorized for this type of call. Other channels may be used if autho-  
rized in your area.  
SX 35 DSC  
39  
ENT  
Press the  
key. The blinking cursor moves to the first digit in the  
MMSID entry field. The last used manual MMSID is displayed.  
Use the SELECT knob or microphone keys to change the MMSID for  
the vessel or station to call.  
CALL  
When the MMSID is correct, press the  
key to send the call. DSC  
calls are made on channel 70. If you observe the display closely, you  
will see the channel number change to channel 70 momentarily and then  
revert to the selected working channel.  
While waiting for acknowledgment from the called vessel,  
WAITING . . . . appears in the lower line of the display.  
INT  
SET CH  
06 08 72 77  
SET MMSID  
WAITING....  
Waiting For Acknowledge  
When the called vessel acknowledges your call, an alert sounds and  
ACK RECEIVE appears in the lower line of the display.  
INT  
16 PRI. HI  
06 08 72 77  
SET MMSID  
ACK RECEIVE  
Acknowledge Received  
Press the PTT button on the microphone to silence the alert and begin  
voice communication with the called vessel.  
The END key may be used to exit the DSC calling procedure at any  
time prior to sending the call.  
All Ships Call  
The All Ship’s call allows you to send an Urgent or Safety DSC call to nearby  
vessels without having to know their MMSID numbers. The All Ship’s call  
may be used in situations that are serious but do not warrant a distress call,  
and voice communication attempts have failed.  
To send an All Ship’s call:  
CALL  
Press the  
key. The call menu appears in the display.  
40  
SX 35 DSC  
Use the SELECT knob to select the ALL SHIP’S topic.  
INT  
LAST CALL  
DIRECTORY  
>ALL SHIP'S  
INDIVIDUAL  
DSC All Ship’s Call  
CALL  
Press the  
key. The CALL TYPE menu appears in the display.  
INT  
CALL TYPE  
≥URGENT  
SAFETY  
PRESS CALL.  
DSC Call Type  
Use the SELECT knob to select either URGENT or SAFETY.  
Press the CALL key. The Call Type Verification screen appears in the  
display.  
INT  
SEND URGENT  
CALL?  
PRESS CALL.  
Call Type Verification  
Call type must be verified.  
Press the CALL key to send the call. The ALL SHIP’S WAITING . . . .  
screen appears in the display. Either URGENT or SAFETY appear to  
indicate priority of the call.  
INT  
ALL SHIP'S  
priority  
WAITING....  
Waiting For Voice Reply  
SX 35 DSC  
41  
Your transceiver is automatically set to Channel 16. Listen for voice  
replies from vessels which have received your call. There is no DSC  
ACK reply to confirm that your call was received.  
Use the PTT button to continue voice communication. The Normal  
Communication screen appears in the display.  
END  
If there is no response to your call, press the  
Communication screen appears in the display.  
key. The Normal  
Group Call  
Your can arrange with other vessels to use a group MMSID so that any  
vessel in a group can contact all other vessels in the same group with a  
single DSC call.  
Your group MMSID is stored in the same manner as your ship MMSID.  
Only one group MMSID is stored at a time, but group MMSID’s can be  
changed as often as desired, allowing participation in more than one group.  
To send a DSC group call:  
CALL  
Press the  
key. The call menu appears in the display.  
Use the SELECT knob to select the GROUP CALL topic.  
INT  
DIRECTORY  
ALL SHIP'S  
INDIVIDUAL  
>GROUP CALL  
DSC Group Call  
CALL  
Press the  
key. The SET CHannel menu appears in the display.  
The current group MMSID appears in the lower line of the display.  
INT  
≥SET CH  
06 08 72 77  
GROUP MMSID  
087654321  
Set Channel  
Use the SELECT knob or the microphone keys to select a working chan-  
nel. Four channel numbers appear in the display as suggested channels  
authorized for this type of call. Other channels may be used if autho-  
rized in your area.  
42  
SX 35 DSC  
CALL  
Press the  
key. The call is sent and WAITING . . . . appears in the  
lower line of the display.  
Your transceiver is automatically set to the previously set working chan-  
nel. Listen for voice replies from vessels which have received your call.  
There is no DSC ACK reply to confirm that your call was received.  
Use the PTT button to continue voice communication. The Normal  
Communication screen appears in the display.  
If there is no response to your call, press the END key. The Normal  
Communication screen appears in the display.  
Receiving DSC Calls  
Your SX 35 DSC can receive four types of DSC calls; Distress, All Ship’s,  
Individual, and Group. Except for Distress, each call type is subdivided  
into one or more priorities.  
All Ship’s type receives the following priorities: Distress ACK, Distress Re-  
lay, Urgency, and Safety.  
Individual type receives the following priorities: Safety and Routine.  
Group type receives one priority: Routine.  
When your SX 35 DSC receives a DSC call from another vessel or a coast  
station, an alert sounds and a Call Received screen appears in the display.  
The Call Received screen identifies the time of a call, the caller, the type and  
the priority of a call. Also, a number appears in the screen indicating the  
number of calls in the log. The call log holds thirty two entries.  
Individual Call Received  
INT  
09:52P  
name or ID  
INDIVIDUAL  
16 ROUTINE  
Individual Routine  
If the calling vessel or station is listed in your DSC calling directory, the  
vessel or station name, as it is listed, appears in the display. If the caller is  
not listed in your directory, the caller’s MMSID appears in the display. Also,  
your transceiver is set to a working channel selected by the caller.  
SX 35 DSC  
43  
For Individual Routine calls the following screen alternates with the Call  
Received screen.  
INT  
09:53P  
name or ID  
PRESS CALL  
16 TO ACK!  
Routine ACK Screen  
CALL  
Press the  
key to acknowledge the call. The sender should re-  
spond to your ACK with voice communication. If not, you may initiate  
voice communication.  
To silence the alert without sending ACK, press the END key. The  
call is interrupted and the Normal Communication screen appears in  
the display.  
ENT  
To silence the alert and send ACK later, press the  
key. The ACK  
screen continues to alternate with the Call Received screen in the dis-  
play.  
For Individual Safety calls, the following screen appears in the display.  
INT  
04:23P  
name or ID  
INDIVIDUAL  
17 SAFETY  
Individual Safety  
END  
Press the  
key to silence the alert sound and listen for a voice  
announcement. There is no DSC ACK for Safety calls.  
Press the PTT button to answer the call with voice communication on  
the working channel selected by the caller.  
44  
SX 35 DSC  
Last Call Received  
Replies to incoming calls are made using the call log. The call log holds  
thirty two entries and the last call received is on top of the list. When the  
thirty third call is received, the oldest entry is lost. Making DSC calls from  
the call log is the like making calls from the DSC calling directory.  
To instantly reply to the last call received or any log entry:  
Press the CALL key. The call menu appears in the display with the  
cursor indicating LAST CALL.  
INT  
>LAST CALL  
DIRECTORY  
ALL SHIP'S  
INDIVIDUAL  
DSC Call Menu  
Press the CALL key again. The most recent call in the call log appears  
in the screen.  
INT  
06:03P  
name or ID  
call type  
18 priority  
Last Call  
Observe the type and priority of the last call logged.  
Use the SELECT knob to select the entry to call.  
CALL  
Press the  
key. An Individual Routine call is transmitted regard-  
less of the type and priority of the last call logged.  
Proceed in the same manner as with normal DSC calls.  
SX 35 DSC  
45  
All Ships Call Received  
An All Ship’s call is received from other vessels or coast stations within  
VHF range of the transmitter. All Ship’s calls present Urgent or Safety in-  
formation important to all vessels in the area.  
When an All Ship’s call is received, an alert sounds and one of the following  
screens appear in the display.  
INT  
INT  
06:14P  
12:34P  
name or ID  
ALL SHIP'S  
19 URGENT  
name or ID  
ALL SHIP'S  
20 SAFETY  
All Ship’s Urgent  
All Ship’s Safety  
If the calling vessel or station is listed in your DSC calling directory, the  
vessel or station name, as it is listed, appears in the display. If the caller is  
not listed in your directory, the caller’s MMSID appears in the display. Also,  
your transceiver is set to Channel 16 by the caller.  
Press the END key to silence the alert sound and listen for a voice  
announcement. There is no DSC ACK for All Ship’s calls.  
Press the PTT button if it is necessary to answer the call with voice  
communication. Use the channel selected by the caller.  
Group Call Received  
A group call is received when anyone in your prearranged group makes a  
group call.  
INT  
07:16P  
name or ID  
GROUP  
21 ROUTINE  
Group Call Received  
END  
Press the  
key to silence the alert sound and listen for a voice  
announcement. There is no DSC ACK for Group calls.  
Press the PTT button to answer the call with voice communication on  
the working channel selected by the caller.  
46  
SX 35 DSC  
REFERENCE  
Maintenance  
The SX 35 DSC VHF transceiver is produced with proven processes and  
current solid state technology. With reasonable care, your SX 35 DSC will  
have a long useful life.  
The following precautions will prevent damage to the transceiver.  
Never press the PTT button unless an antenna or proper dummy load  
is connected to the antenna jack.  
Do not operate the transceiver if the power source is not within the  
specified range of 11 to 16 Vdc.  
Replace the antenna and/or coaxial cable if damaged in any way or  
severely weathered.  
Avoid continuous direct sunlight on the LCD.  
Avoid overextending the microphone cable.  
Do not use solvents or harsh chemicals to clean the microphone, case-  
work or LCD display.  
Special Functions  
Simulator Mode  
Provides simulated GPS data for demonstration of realistic displays. Trans-  
mitter and DSC functions are totally disabled.  
Press and hold the MENU key while turning power On.  
Clear Memory Channels  
Clears the channel bank for the Memory Scan function.  
MEM  
Press and hold the  
New Microphone  
Initializes the keypad when a new microphone is installed.  
key while turning power On.  
Press and hold the  
On.  
key on the microphone while turning power  
1
Printer Operation  
Initializes the Tx port for 4800 baud PC/printer interface.  
Press and hold the 16 key while turning power On.  
SX 35 DSC  
47  
Troubleshooting  
Troubleshooting Chart  
Symptom  
Probable Cause  
Corrective Action  
Transceiver won't turn  
On.  
No dc voltage, blown  
fuse, faulty wiring.  
Rotate VOL knob CW,  
check buss voltage,  
replace fuse (6.3 Amp),  
check power cable and  
connections.  
Buzzing sound from  
speaker with engine  
running.  
Ignition or charging  
system noise.  
Reroute dc power cable,  
install noise filter on  
alternator and dc power  
cable, use resistive spark  
plug wires.  
No sound from speaker. Squelch control set too  
Set SQ control full CCW,  
high, volume control set set VOL CW.  
too low.  
Channel blocked by  
stuck mic button.  
Select a different  
channel. Look for TX  
annunciator in display.  
Faulty external speaker  
or cable.  
Unplug external speaker  
cable.  
Reports of weak transmit Antenna.  
signals even when using  
HI power settings.  
Have a technician test  
transmitter output  
power and antenna  
VSWR.  
Coaxial cable faulty.  
Inspect antenna cable  
carefully for nicks. Wet  
coax absorbs transmitter  
power.  
Latitude and longitude  
coordinates are not  
displayed.  
Lat/Lon position display Use Menu\DataSet\  
not turned On.  
LLposition, to turn On.  
GPS cable faulty or  
disconnected.  
Check cable and  
connections.  
GPS not operating or  
position is invalid.  
Make sure GPS is  
functioning and output  
format is NMEA 0183  
with RMC sentence  
selected.  
48  
SX 35 DSC  
Specifications  
SX DSC 35 Technical Specifications  
GENERAL  
Compliance:  
Meets EU specification EN301-025 V1.1.2  
(August 2000), Radio Regulations Appen-  
dix 18, and DSC Class D/SC-101.  
Number of Channels:  
All available INT’L (per Appendix 18 plus  
M & M2 for UK). Externally FLASH pro-  
grammable for various Country Require-  
ments.  
Vdc Input:  
13.6 Vdc with isolated chassis.  
Size (W x H x D):  
153mm x 61mm x 158mm (6.02” x 2.4” x  
6.22”). Heat sink is included. Not bracket.  
Weight:  
1.088Kg (2.4 lbs) with MIC.  
CFR-46  
Waterproofness:  
Antenna:  
50 OHM impedance with SO239 Connec-  
tor. Transmitter operates 5 minutes into  
OPEN or SHORT.  
Temperature Range:  
Construction:  
-20 Degrees C to +50 Degrees C  
UV Stable Case with Tactile-Feel colored  
silicon rubber key switches Backlighted  
rubber keypad. Die Cast Rear Heat sink.  
LCD Display:  
4 Lines with 11 characters each and BOLD  
channel number display with 3 discrete an-  
nunciators. Silver background with dark  
Black letters and Bright Orange display  
backlighting. LCD has dimmable ORANGE  
display/keypad backlighting. Contrast  
control provides best viewing angle. View-  
ing area is 63.3mm x 23mm (2.49” x .90”).  
Speaker:  
Sealed Water Resistant Polypropylene.  
Microphone:  
Special styled MIC with 12 Alpha Numeric  
keys. MIC editing works simultaneously  
with Code Wheel and allows discrete chan-  
nel entry.  
Channel/Selection Changing: 2 bit Code Wheel.  
Squelch/Volume Control: Integrated, includes Power On/Off control.  
SX 35 DSC  
49  
External Connections:  
Watch Receiver:  
Jack for External Speaker & 8 pin COM con-  
nector.  
Separate CH70 watch receiver included.  
Decoding performance is less than 10-2 Bit  
error rate with 0dBµV input signal level.  
CPU:  
High-speed 8 bit RISC microprocessor with  
features/channels externally FLASH pro-  
grammable.  
DSC Call Types:  
See chart below:  
Format Specifier  
Category  
First Telecommand  
Symbol number  
Receive Transmit  
Distress - (112)  
F3E/G3E Simplex - (100)  
Distress ACK - (110)  
X
X
X
X
X
X
X
X
X
X
All Ship’s - (116)  
All Ship’s - (116)  
All Ship’s - (116)  
All Ship’s - (116)  
Distress - (112)  
Distress - (112)  
Urgency - (110)  
Safety - (108)  
Distress RELAY - (112)  
F3E/G3E Simplex - (100)  
F3E/G3E Simplex - (100)  
F3E/G3E Simplex - (100)  
F3E/G3E Simplex - (100)  
F3E/G3E Simplex - (100)  
F3E/G3E Simplex - (100)  
X
X
Individual - (120) Urgency - (110)  
Individual - (120) Safety - (108)  
Individual - (120) Routine - (100)  
X
X
Group - (114)  
Routine - (100)  
2nd Telecommand  
Transmit & Receive (126) – No Information.  
DSC Distress Key:  
Red & Covered. Plastic Cover is hinged to  
prevent loss. Key is backlighted full time.  
Hold down 3 seconds – countdown timer  
is displayed.  
DSC Call Log:  
DSC Directory:  
32 Entries. Instant call back any Log Entry  
with Individual Routine call.  
Caller’s Name is displayed if MMSID  
matches to Directory Entry.  
32 Entry list with scrolling and Auto Sort-  
ing. Entries can be edited to Line/Charac-  
ter position.  
MMSID:  
Own Ship’s & Group are stored in nonvola-  
tile memory.  
Memory Scan Channels:  
Unlimited with instant editing and can be  
cleared on Power-up. The Memory Chan-  
nel list is presented in a Page Mode format  
with instant ADD/DELETE function.  
50  
SX 35 DSC  
Alarm Tones:  
3 different tone sequences are provided.  
Phased Locked Loop (PLL).  
Frequency Control Method:  
Frequency Stability:  
+/-5 PPM for both the Transmitter/Re-  
ceiver.  
GPS/NMEA:  
GPS Display:  
$GPRMC sentence is decoded. NMEA  
Checksum can be turned Off/On.  
Data is selected from following:  
• Date & local time & LL Position (3  
digit for seconds).  
• SOG/COG& LL Position (3 digit for  
seconds).  
• Time & Manual LL Position (no sec-  
onds).  
• No Data.  
Data Output:  
DSC call formats can be sent to PC & printer  
using 4800 baud and standard Terminal  
program.  
Special Functions:  
Three scanning Modes:  
• All Scan  
• Memory Scan (nonvolatile)  
• Priority Scan  
Noisy channels can be temporarily deleted  
in All Scan Mode.  
Built-in GPS Simulator.  
Automatic Auto Calendar for clock.  
Manual Entry of LL & Time for DSC Emer-  
gency Calling.  
Local Time Offset values can be entered in  
30 minute intervals.  
Instant Access to “Last DSC Call”.  
SX 35 DSC  
51  
TRANSMITTER  
Power Output:  
Tx Current:  
25 Watts or 1 Watt switchable.  
6 Amps @ 25W Tx.  
1 Amp @ 1W Tx.  
Modulation:  
G3E for Voice, G3B for DSC Data.  
156.025Mhz - 157.425Mhz @ 25Khz spacing.  
Transmit Frequencies:  
Spurious/Harmonic Emissions:Less than 0.25µW.  
Modulation Distortion:  
Less than 4% @ 1Khz for +/-3Khz devia-  
tion.  
Modulation Limiter:  
Frequency Response:  
+/-5Khz deviation with 100% modulation.  
Matches +6dB/Octave slope within  
+1/-3dB from 300 to 2500Hz.  
18dB/Octave beyond 3000Hz. Audio Low  
Pass Filter is included.  
Hum & Noise:  
RECEIVER  
Less than -40dB.  
Receive Frequencies:  
Sensitivity:  
156.025Mhz - 162.025Mhz @ 25Khz spacing.  
0.5µV or less for 20dB SINAD  
Squelch Range:  
Audio Output Power:  
0.25µV to 0.80µV @ full squelch  
3.0W minimum @ 4 Ohms with less than  
10% distortion.  
External speaker:  
Internal speaker is Off when external  
speaker is On.  
Receiver Current:  
200mA in Standby ( 2 receivers)  
+/-7 kHz minimum.  
Modulation Acceptance:  
Adjacent Channel Selectivity: Greater than -70dB for +/-25Khz.  
Image Rejection:  
Greater than -70dB.  
Intermodulation Spurious  
Response:  
Greater than -70dB.  
Noise Level:  
Greater than -40dB unsquelched.  
Audio Frequency Response:  
Matches -6dB/Octave slope within  
+1/-3dB from 300 to 2500Hz, 18dB/Octave  
over 3000Hz.  
52  
SX 35 DSC  
Channel Assignments  
The Channel Assignment tables on the following pages list the channel num-  
ber, frequency and usage for Marine VHF communication as published by  
the Radiocommunications Agency.  
Depending upon your selection, certain channels may be either simplex  
(single frequency) or duplex (two frequency) as indicated in the tables.  
On simplex channels, your transceiver transmits and receives on the same  
frequency. On duplex channels, your transceiver transmits on one  
frequency and receives on another frequency. You may communicate  
with shore stations on both simplex and duplex channels, but because of  
the frequency offset, you cannot communicate with other vessels on a  
duplex channel.  
Channel 16 is the International Distress, Safety and Calling channel.  
All vessels equipped with VHF transceivers are required to monitor  
channel 16.  
SX 35 DSC  
53  
Use of International Mobile Maritime VHF Channels  
Table 1 of 2  
Transmitting  
Frequencies  
(MHz)  
Port Operations  
Public  
Corre-  
spondence  
Channel  
Designators  
Inter-  
ship  
Notes  
Ship  
Stations  
Coast  
Stations  
Single  
Frequency  
Two  
Frequency  
60  
156.025  
156.050  
156.075  
156.100  
156.125  
156.150  
160.625  
160.650  
160.675  
160.700  
160.725  
160.750  
X
X
X
X
X
X
X
01  
61  
02  
62  
03  
X
X
X
X
X
63  
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  
160.775  
160.800  
160.825  
160.850  
160.875  
X
X
X
X
X
X
X
X
X
X
04  
64  
05  
65  
06  
66  
07  
67  
08  
68  
09  
69  
10  
1
X
160.925  
160.950  
156.375  
X
X
X
X
X
X
X
HMCG SAR  
156.425  
156.450  
156.475  
156.500  
X
X
X
X
X
X
X
5
6
Oil Pollution  
Digital Selective Calling for Distress,  
Safety and Calling  
70  
156.525  
156.525  
11  
71  
12  
72  
13  
73  
14  
74  
156.550  
156.575  
156.600  
156.625  
156.650  
156.675  
156.700  
156.725  
156.550  
156.575  
156.600  
X
X
X
X
X
X
7
5
156.650  
156.675  
156.700  
156.725  
X
X
X
X
Also, on-board  
commuication  
15  
2
4
156.750  
156.775  
156.750  
X
X
75  
54  
SX 35 DSC  
Use of International Mobile Maritime VHF Channels  
Table 2 of 2  
Transmitting  
Frequencies  
(MHz)  
Port Operations  
Public  
Corre-  
spondence  
Channel  
Designators  
Inter-  
ship  
Notes  
Ship  
Stations  
Coast  
Stations  
Single  
Frequency  
Two  
Frequency  
16  
156.800  
156.825  
156.800  
DISTRESS, SAFETY and CALLING  
X
76  
4
2
Also, on-board  
communication  
17  
156.850  
156.850  
X
X
X
77  
78  
79  
156.875  
156.900  
156.925  
156.950  
156.975  
157.000  
18  
19  
20  
161.500  
161.525  
161.550  
161.575  
161.600  
X
X
X
X
X
X
X
X
X
X
X
Also, Marinas etc.  
UK only  
80  
157.025  
161.625  
X
X
21  
22  
23  
24  
25  
26  
27  
28  
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  
157.850  
161.425  
161.975  
162.025  
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  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
81  
82  
83  
84  
85  
86  
87  
88  
X
X
X
X
X
X
X
162.000  
X
X
8
8
3
3
157.850  
161.425  
161.975  
162.025  
United Kingdom Marina Channel  
M
United Kingdom Marina Channel M2  
AIS  
AIS  
SX 35 DSC  
55  
Use of International Mobile Maritime VHF Channels  
Notes:  
Notes  
1. Channel 06 may also be used for communications between ship  
stations and aircraft engaged in coordinated search and rescue  
operations. Ship stations shall avoid harmful interference to such  
communications on channel 06 as well as to communications be-  
tween aircraft stations, ice breakers and assisted ships during ice  
seasons.  
2. Channels 15 and 17 may also be used for on-board communica-  
tions provided the effective radiated power does not exceed 1  
Watt.  
3. These channels (AIS 1 and AIS 2) will be used for an automatic  
ship identification and surveillance system capable of providing  
worldwide operation on the high seas, unless other frequencies  
are designated on a regional basis for this purpose.  
4. The use of these channels (75 and 76) should be restricted to navi-  
gation related communication only, and all precautions should  
be taken to avoid harmful interference to channel 16, e.g. by lim-  
iting power to 1 Watt or by means of geographical location. These  
channels are not available in the SX-35 DSC.  
5. As of 01 July 1999, these channel (10 or 73 depending upon loca-  
tion) are also used for the broadcast of Marine Safety Information  
by the Maritime & Coastguard Agency in the UK only.  
6. Channel 70 is to be used exclusively for digital selective calling  
for distress, safety and calling.  
7. Channel 13 is designated for use on a worldwide basis as a navi-  
gation safety communication channel, primarily for intership navi-  
gation safety communications.  
8. Channels n0 and n2 are UK channels and should only be used in  
UK territorial waters. Their on-board use is covered by a Ship  
Radio License. However, equipment that is only capable of oper-  
ating on these frequencies is usually licensed under a Coastal Sta-  
tion Radio License and it is not necessary for the operator to hold  
an operator’s certificate.  
56  
SX 35 DSC  

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