Icom Fish Finder IC M304 User Manual

INSTRUCTION MANUAL  
VHF MARINE TRANSCEIVER  
iM304  
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IN CASE OF EMERGENCY  
NOTE  
If your vessel requires assistance, contact other vessels and  
the Coast Guard by sending a distress call on Channel 16.  
A WARNING STICKER is supplied with the transceiver.  
To comply with FCC regulations, this sticker must be affixed in  
such a location as to be readily seen from the operating con-  
trols of the radio as in the diagram below. Make sure the cho-  
sen location is clean and dry before applying the sticker.  
(p. 32)  
USING CHANNEL 16  
DISTRESS CALL PROCEDURE  
1. “MAYDAY MAYDAY MAYDAY.”  
2. “THIS IS ...............” (name of vessel)  
3. Your call sign or other indication of the vessel (AND 9-  
digit DSC ID if you have one).  
EXAMPLE  
4. “LOCATED AT ...............” (your position)  
5. The nature of the distress and assistance required.  
6. Any other information which might facilitate the rescue.  
WARNING  
STICKER  
Or, transmit your distress call using digital selective calling on  
Channel 70.  
USING DIGITAL SELECTIVE CALLING (Ch 70)  
DISTRESS CALL PROCEDURE  
1. While opening the key cover, push and hold  
[DISTRESS] for 5 sec. until you hear 5 short beeps  
change to one long beep.  
2. Wait for an acknowledgment from a coast station.  
• Channel 16 is automatically selected.  
3. Push and hold [PTT], then transmit the appropriate  
information as listed above.  
ii  
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RADIO OPERATOR WARNING  
Icom requires the radio operator to meet the  
FCC Requirements for Radio Frequency Expo-  
sure. An omnidirectional antenna with gain not  
greater than 9 dBi must be mounted a minimum  
FAILURE TO OBSERVE THESE LIMITS MAY ALLOW  
THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF  
RADIATION ABSORPTION WHICH EXCEEDS THE FCC  
MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT.  
IT IS THE RESPONSIBILITY OF THE RADIO OPERATOR  
TO ENSURE THAT THE MAXIMUM PERMISSIBLE EXPO-  
SURE LIMITS ARE OBSERVED AT ALL TIMES DURING  
RADIO TRANSMISSION. THE RADIO OPERATOR IS TO  
ENSURE THAT NO BYSTANDERS COME WITHIN THE  
RADIUS OF THE MAXIMUM PERMISSIBLE EXPOSURE  
LIMITS.  
WARNING  
of 5 meters (measured from the lowest point of  
the antenna) vertically above the main deck and  
all possible personnel. This is the minimum safe separation  
distance estimated to meet all RF exposure compliance re-  
quirements. This 5 meter distance is based on the FCC Safe  
Maximum Permissible Exposure (MPE) distance of 3 meters  
added to the height of an adult (2 meters) and is appropriate  
for all vessels.  
Determining MPE Radius  
THE MAXIMUM PERMISSIBLE EXPOSURE (MPE) RA-  
DIUS HAS BEEN ESTIMATED TO BE A RADIUS OF  
ABOUT 3M PER OET BULLETIN 65 OF THE FCC.  
THIS ESTIMATE IS MADE ASSUMING THE MAXIMUM  
POWER OF THE RADIO AND ANTENNAS WITH A MAXI-  
MUM GAIN OF 9dBi ARE USED FOR A SHIP MOUNTED  
SYSTEM.  
For watercraft without suitable structures, the antenna must  
be mounted so as to maintain a minimum of 1 meter vertically  
between the antenna, (measured from the lowest point of the  
antenna), to the heads of all persons AND all persons must  
stay outside of the 3 meter MPE radius.  
Do not transmit with radio and antenna when persons are  
within the MPE radius of the antenna, unless such persons  
(such as driver or radio operator) are shielded from antenna  
field by a grounded metallic barrier. The MPE Radius is the  
minimum distance from the antenna axis that person should  
maintain in order to avoid RF exposure higher than the allow-  
able MPE level set by FCC.  
iii  
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TABLE OF CONTENTS  
FOREWORD …………………………………………………………… i  
IMPORTANT …………………………………………………………… i  
EXPLICIT DEFINITIONS ……………………………………………… i  
IN CASE OF EMERGENCY…………………………………………… ii  
NOTE …………………………………………………………………… ii  
RADIO OPERATOR WARNING…………………………………… iii  
TABLE OF CONTENTS ……………………………………………… iv  
PRECAUTIONS……………………………………………………… v  
6
DSC OPERATION …………………………………………… 13–27  
I MMSI code programming…………………………………… 13  
I MMSI code check ……………………………………………… 13  
I DSC address ID……………………………………………… 14  
I Position indication ……………………………………………… 15  
I Distress call …………………………………………………… 16  
I Transmitting DSC calls ………………………………………… 17  
I Receiving DSC calls …………………………………………… 24  
7
8
SET MODE …………………………………………………… 28–30  
I Set mode programming ……………………………………… 28  
I Set mode items ………………………………………………… 29  
1
2
OPERATING RULES ……………………………………………… 1  
PANEL DESCRIPTION ………………………………………… 2–4  
I Front panel ……………………………………………………… 2  
I Microphone ……………………………………………………… 3  
I Function display ………………………………………………… 4  
CONNECTIONS AND MAINTENANCE …………………… 31–34  
I Connections …………………………………………………… 31  
I Supplied accessories ………………………………………… 32  
I Antenna ………………………………………………………… 32  
I Fuse replacement ……………………………………………… 32  
I Cleaning ………………………………………………………… 32  
I Mounting the transceiver ……………………………………… 33  
I Optional MB-92 attachment………………………………… 33  
I Optional MB-69 installation …………………………………… 34  
3
BASIC OPERATION …………………………………………… 5–9  
I Channel selection ……………………………………………… 5  
I Receiving and transmitting…………………………………… 7  
I Call channel programming ……………………………………… 8  
I Channel comments ……………………………………………… 8  
I Microphone lock function ……………………………………… 9  
I Display backlighting……………………………………………… 9  
I AquaQuake water draining function …………………………… 9  
9
TROUBLESHOOTING …………………………………………… 35  
10 CHANNEL LIST…………………………………………………… 36  
4
5
SCAN OPERATION ………………………………………… 10–11  
I Scan types ……………………………………………………… 10  
I Setting TAG channels ………………………………………… 11  
I Starting a scan ………………………………………………… 11  
11 SPECIFICATIONS AND OPTIONS ……………………… 37–38  
I Specifications………………………………………………… 37  
I Options ………………………………………………………… 38  
DUALWATCH/TRI-WATCH ……………………………………… 12  
I Description ……………………………………………………… 12  
I Operation ……………………………………………………… 12  
12 TEMPLATE ……………………………………………………… 39  
iv  
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PRECAUTIONS  
BE CAREFUL! The transceiver rear panel will become  
hot when operating continuously for long periods.  
Place the transceiver in a secure place to avoid inadvertent  
use by children.  
RWARNING! NEVER connect the transceiver to an AC  
outlet. This may pose a fire hazard or result in an electric  
shock.  
CAUTION: Changes or modifications to this device, not ex-  
pressly approved by Icom Inc., could void your authority to  
operate this device under FCC regulations.  
BE CAREFUL! The transceiver (except cables) and hand  
microphone employ waterproof construction, which corre-  
sponds to IPX7 of the international standard IEC 60529  
(2001). However, once the transceiver has been dropped,  
waterproofing cannot be guaranteed due to the fact that the  
case may be cracked, or the waterproof seal damaged, etc.  
NEVER connect the transceiver to a power source of more  
than 16 V DC or use reverse polarity. This will ruin the trans-  
ceiver.  
NEVER cut the DC power cable between the DC plug and  
fuse holder. If an incorrect connection is made after cutting,  
the transceiver may be damaged.  
NEVER place the transceiver where normal operation of the  
vessel may be hindered or where it could cause bodily injury.  
KEEP the transceiver at least 3.3 ft (1 m) away from the  
ship’s navigation compass.  
DO NOT use or place the transceiver in areas with temper-  
atures below –4°F (–20°C) or above +140°F (+60°C) or, in  
areas subject to direct sunlight, such as the dashboard.  
AVOID the use of chemical agents such as benzine or al-  
cohol when cleaning, as they may damage the transceiver  
surfaces.  
v
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OPERATING RULES  
1
(2) OPERATOR’S LICENSE  
D
PRIORITIES  
1
A Restricted Radiotelephone Operator Permit is the license  
most often held by small vessel radio operators when a radio  
is not required for safety purposes.  
• Read all rules and regulations pertaining to priorities and  
keep an up-to-date copy handy. Safety and distress calls  
take priority over all others.  
The Restricted Radiotelephone Operator Permit must be  
posted or kept with the operator. Only a licensed radio opera-  
tor may operate a transceiver.  
• You must monitor Channel 16 when you are not operating  
on another channel.  
• False or fraudulent distress signals are prohibited and pun-  
ishable by law.  
However, non-licensed individuals may talk over a transceiver  
if a licensed operator starts, supervises, ends the call and  
makes the necessary log entries.  
D
PRIVACY  
• Information overheard but not intended for you cannot law-  
fully be used in any way.  
Keep a copy of the current government rules and regulations  
handy.  
• Indecent or profane language is prohibited.  
Radio license for boaters (U.S.A. only)  
The Telecommunications Act of 1996 permits recreational  
boaters to have and use a VHF marine radio, EPIRB, and  
marine radar without having an FCC ship station license.  
Boaters traveling on international voyages, having an HF  
single sideband radiotelephone or marine satellite termi-  
nal, or required to carry a marine radio under any other  
regulation must still carry an FCC ship station license. For  
further information, see the FCC Ship Radio Stations Fact  
Sheet.  
D
RADIO LICENSES  
(1) SHIP STATION LICENSE  
You must have a current radio station license before using the  
transceiver. It is unlawful to operate a ship station which is not  
licensed.  
Inquire through your dealer or the appropriate government  
agency for a Ship-Radiotelephone license application. This  
government-issued license states the call sign which is your  
craft’s identification for radio purposes.  
1
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PANEL DESCRIPTION  
2
I Front panel  
w POWER/VOLUME CONTROL [VOL] (p. 7)  
Rotate to turn the transceiver power ON and OFF and ad-  
justs the audio level.  
Speaker  
Function display (p. 4)  
q
w
e SQUELCH CONTROL [SQL] (p. 7)  
Rotate to set the squelch threshold level.  
r CHANNEL 16/CALL CHANNEL KEY [!•9]  
Push to select Channel 16. (p. 5)  
Push and hold for 1 sec. to select call channel. (p. 5)  
• “CALL” appears when the call channel is selected.  
Push and hold for 3 sec. to enter call channel program-  
ming condition when the call channel is selected. (p. 8)  
While pushing and holding [CH/WX], push to enter the  
channel comments programming condition. (p. 8)  
Push to move the cursor forward. (p. 8)  
i
u
y
t
r
e
q CHANNEL UP/DOWN KEYS [Y]/[Z]•[U/I/C]  
Selects the operating channels, Set mode settings, etc.  
(pgs. 5, 6, 28)  
While turning power ON, push to enter Set mode. (p. 28)  
t CHANNEL/WEATHER CHANNEL KEY [CH/WX•DUAL]  
Selects and toggles the regular channel and weather  
channel when pushed momentarily. (p. 6)  
Push and hold for 1 sec. to start Dualwatch or Tri-watch.  
(p. 12)  
While pushing and holding [SCAN], push to adjust the  
brightness of the LCD and key backlight. (p. 9)  
Selects one of three channel groups in sequence when  
both keys are pushed. (p. 6)  
• U.S.A., International and Canadian channels are available.  
While turning power ON, push and hold both keys to ac-  
tivate the AquaQuake function. (p. 9)  
Push to stop Dualwatch or Tri-watch when either is acti-  
vated. (p. 12)  
Push to move the cursor backward. (p. 8)  
2
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PANEL DESCRIPTION 2  
I Microphone  
2
y SCAN KEY [SCAN•TAG] (p. 11)  
q
Push to start or stop the Normal or Priority scan.  
Push and hold for 1 sec. to set or clear the displayed  
channel as a TAG (scanned) channel.  
Microphone  
• The favorite channels are set by the TAG channel setting.  
While pushing and holding [HI/LO] on the microphone,  
push for 3 sec. to clear all TAG channels in the selected  
channel group.  
w
e
• Repeat above procedure to set all TAG channels.  
u DISTRESS KEY [DISTRESS] (p. 16)  
Push and hold for 5 sec. to transmit a Distress call.  
i DSC/POSITION KEY [DSC•POS]  
Push to enter DSC menu. (p. 13)  
q PTT SWITCH [PTT]  
Push and hold for 1 sec. to show the current position  
from a GPS receiver. (p. 15)  
Push and hold to transmit; release to receive. (p. 7)  
w CHANNEL UP/DOWN KEYS [Y]/[Z]  
Push either key to change the operating channel, Set  
mode settings, etc. (pgs. 5, 6, 28)  
When the Favorite channel function is turned ON, push  
either key to select the favorite channels in the selected  
channel group in sequence. (p. 30)  
e TRANSMIT POWER KEY [HI/LO]  
Push to toggle the power high and low. (p. 7)  
• Some channels are set to low power only.  
While pushing and holding [HI/LO], turn power ON to  
toggle the Microphone Lock function ON and OFF.  
(p. 9)  
3
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2
PANEL DESCRIPTION  
t CALL CHANNEL INDICATOR (p. 5)  
I Function display  
Appears when the call channel is selected.  
y LOW POWER INDICATOR (p. 7)  
q
w
e
r
Appears when low power is selected.  
u WEATHER CHANNEL INDICATOR (pgs. 6, 29)  
WX” appears when a weather channel is selected.  
WX ALT” appears when the Weather alert function is in  
use; blinks when an alert tone is received.  
!
t
y
!
!
u
i
i DSC INDICATORS  
DSC” appears when a DSC call is received. (p. 24)  
POS REPLY” appears when a Position Reply call or  
Position Report Reply call is received. (p. 27)  
o
o CHANNEL COMMENT INDICATOR  
Channel comment appears if programmed. (p. 8)  
q CHANNEL GROUP INDICATOR (p. 6)  
“  
” scrolls when the battery voltage drops to  
Indicates whether a U.S.A. “U,” International “ ” or Cana-  
dian “C” channel is in use.  
approx. 10.8 V DC or below.  
“ ” blinks during Priority scan; “  
” blinks during  
Normal scan. (p. 11)  
“ ” blinks during Dualwatch; “ ” blinks during Tri-  
watch. (p. 12)  
w CHANNEL NUMBER READOUT  
Indicates the selected operating channel number.  
• Refer to CHANNEL LIST. (p. 36)  
In Set mode, indicates the selected condition. (p. 28)  
! TAG CHANNEL INDICATOR (p. 11)  
Appears when a TAG channel is selected.  
e TRANSMIT INDICATOR (p. 7)  
Appears while transmitting.  
! DUPLEX INDICATOR (p. 6)  
Appears when a duplex channel is selected.  
r BUSY INDICATOR (p. 7)  
Appears when receiving a signal or when the squelch  
opens.  
! GPS INDICATOR  
Appears while valid position data is received.  
Blinks when invalid position data is received.  
Disappears when no GPS receiver is connected.  
4
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BASIC OPERATION  
3
I Channel selection  
2
3
ï
ï
Channel 16  
Channel 9 (Call channel)  
Channel 16 is the distress and safety channel. It is used for  
establishing initial contact with a station and for emergency  
communications. Channel 16 is monitored during both Dual-  
watch and Tri-watch. While standing by, you must monitor  
Channel 16.  
Each regular channel group has a separate leisure-use call  
channel. The call channel is monitored during Tri-watch. The  
call channels can be programmed (p. 8) and are used to store  
your most often used channels in each channel group for  
quick recall.  
Push [!] momentarily to select Channel 16.  
Push [CH/WX] to return to the condition before selecting  
Channel 16, or push [Y] or [Z] to select operating chan-  
nel.  
Push and hold [9] (!) for 1 sec. to select the call channel  
of the selected channel group.  
• “CALL” and call channel number appear.  
• Each channel group may have an independent call channel after  
programming a call channel. (p. 8)  
Push [CH/WX] to return to the condition before selecting  
call channel, or push [Y] or [Z] to select a channel.  
Push  
Push  
for 1 sec.  
Scrolls  
Convenient!  
Scrolls  
When the Favorite channel function is turned ON (p. 30),  
[Y]/[Z] keys on the microphone select the favorite channels  
in the selected channel group in sequence when pushed.  
• The favorite channels are set by the TAG channel setting. (p. 11)  
5
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3
BASIC OPERATION  
ï
ï
U.S.A.,Canadian and international channels  
Weather channels  
The IC-M304 is pre-programmed with 59 U.S.A., 59 interna-  
tional and 63 Canadian channels. These channel groups may  
be specified for the operating area.  
The IC-M304 has 10 pre-programmed weather channels.  
These are used for monitoring broadcasts from NOAA (Na-  
tional Oceanic and Atmospheric Administration.)  
q Push [CH/WX] to select a regular channel.  
• If a weather channel appears, push [CH/WX] again.  
w Push [U/I/C] (both [Y] and [Z]) on the transceiver to  
change the channel group, if necessary.  
• U.S.A., International and Canadian channel groups can be se-  
lected in sequence.  
The transceiver can automatically detect a weather alert tone  
on the selected weather channel while receiving the channel  
or during scanning. (p. 29)  
q Push [CH/WX] once or twice to select a weather channel.  
• “WX” appears when a weather channel is selected.  
• “WX ALT” appears when the Weather alert function is in use.  
(p. 29)  
e Push [Y] or [Z] to select a channel.  
• “ ” appears for duplex channels.  
w Push [Y] or [Z] to select a channel.  
Push  
once or twice  
Push [U/I/C] (both  
and  
)
When Weather alert is OFF.  
When Weather alert is ON.  
6
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BASIC OPERATION 3  
I Receiving and transmitting  
CAUTION: Transmitting without an antenna will damage  
the transceiver.  
Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CAN-  
NOT be lawfully used by the general public in U.S.A. wa-  
ters.  
3
q Rotate [VOL] to turn power ON.  
w Set the audio and squelch levels.  
IMPORTANT: To maximize the readability of your trans-  
mitted signal, pause a few sec. after pushing [PTT], hold  
the microphone 2 to 4 inches (5 to 10 cm) from your mouth  
and speak into the microphone at a normal voice level.  
Rotate [SQL] fully counterclockwise in advance.  
Rotate [VOL] to adjust the audio output level.  
Rotate [SQL] clockwise until the noise disappears.  
e Push [U/I/C] (both [Y] and [Z]) on the transceiver several  
times to select the desired channel group. (p. 6)  
r Push [Y] or [Z] to select a channel. (p. 5)  
Microphone  
y u  
e r  
q
• When receiving a signal, “  
from the speaker.  
” appears and audio is emitted  
• Further adjustment of [VOL] may be necessary.  
t Push [HI/LO] on the microphone to select the output  
power if necessary.  
• “LOW” appears when low power is selected.  
• Choose low power for short range communications, choose high  
power for longer distance communications.  
• Some channels are for low power only.  
w
r
t
y Push and hold [PTT] to transmit, then speak into the mi-  
crophone.  
NOTE for TOT (Time-out Timer) function  
The TOT function inhibits continuous transmission over a pre-  
set time period after the transmission starts.  
• “  
” appears.  
• Channel 70 cannot be used for transmission other than DSC.  
u Release [PTT] to receive.  
7
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3
BASIC OPERATION  
I Call channel programming  
I Channel comments  
Call channel is used to select Channel 9 (default), however,  
you can program the call channel with your most often-used  
channel in each channel group for quick recall.  
Memory channels can be labeled with a unique alphanumeric  
ID of up to 10 characters each.  
More than 6 characters comment scrolls automatically at the  
channel comment indicator after the channel selection.  
q Push [U/I/C] (both [Y] and [Z]) on the transceiver several  
times to select the desired channel group (U.S.A., Interna-  
tional or Canada) to be programmed.  
w Push and hold [9] (!) for 1 sec. to select the call channel  
of the selected channel group.  
• “CALL” and call channel number appear.  
e Push and hold [9] (!)  
again for 3 sec. (until a long  
beep changes to 2 short  
beeps) to enter call channel  
programming condition.  
Capital letters, small letters (except f, j, k, p, s, v, x, z), 0 to 9,  
some symbols (= + – . /) and space can be used.  
q Select the desired channel.  
• Cancel Dualwatch, Tri-watch or Scan in advance.  
w While pushing [CH/WX], push [!] to edit the channel  
comment.  
• A cursor and the first char-  
acter start blinking alter-  
nately.  
• Channel number starts blink-  
ing.  
r Push [Y] or [Z] to select  
the desired channel.  
t Push [!] to program the  
displayed channel as the  
call channel.  
e Pushing [Y] or [Z] to select the desired character.  
• Push [!] or [CH/WX] to move the cursor forward or backward,  
respectively.  
r Repeat step e to input all characters.  
t Push [DSC] to input and set the comment.  
• Push [SCAN] to cancel.  
• The cursor and the character stop blinking.  
y Repeat steps q to t to program other channel com-  
ments, if desired.  
• Push [CH/WX] to cancel.  
• The channel number stops  
blinking.  
8
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BASIC OPERATION 3  
I Microphone lock function  
The microphone lock function electrically locks [Y] and [Z]  
keys on the supplied microphone. This prevents accidental  
channel changes and function access.  
I AquaQuake water draining  
function  
3
The IC-M304 uses a new technology to clear water away  
from the speaker grill: AquaQuake. AquaQuake helps drain  
water away from the speaker housing (water that might oth-  
erwise muffle the sound coming from the speaker). The IC-  
M304 emits a vibrating noise when this function is being  
used.  
While pushing and holding [HI/LO] on the microphone,  
turn power ON to toggle the Microphone lock function ON  
and OFF.  
While pushing and holding [Y] and [Z], turn power ON.  
• A low beep tone sounds while [Y] or [Z] keys are held to drain  
water, regardless of [VOL] control setting.  
• The transceiver never accepts a key operation while the  
AquaQuake function is activated.  
[Y]/[Z]  
[HI/LO]  
• “  
” scrolls at the channel comment indicator.  
I Display backlighting  
Scrolls  
The function display and keys can be backlit for better visibil-  
ity under low light conditions.  
While pushing and holding [SCAN], push [Y] or [Z] to ad-  
just the brightness of the LCD and key backlight.  
• The backlight is selectable in 3 levels and OFF.  
9
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SCAN OPERATION  
4
I Scan types  
Scanning is an efficient way to locate signals quickly over a  
wide frequency range. The transceiver has Priority scan and  
Normal scan.  
Set the TAG channels (scanned channels) before scanning.  
Clear the TAG channels which inconveniently stop scanning,  
such as those for digital communication use. (Refer to the  
right page for details.)  
When the Weather alert function is turned ON, the previously  
selected (last used) weather channel is also checked while  
scanning. (p. 29)  
Choose Priority or Normal scan in Set mode. (p. 29)  
PRIORITY SCAN  
NORMAL SCAN  
CH 01  
CH 02  
CH 01  
CH 02  
CH 06  
CH 03  
CH 06  
CH 16  
CH 03  
CH 05  
CH 04  
CH 05  
CH 04  
Priority scan searches through all TAG channels in se-  
quence while monitoring Channel 16. When a signal is de-  
tected on Channel 16, scan pauses until the signal disap-  
pears; when a signal is detected on a channel other than  
Channel 16, scan becomes Dualwatch until the signal dis-  
appears.  
Normal scan, like priority scan, searches through all TAG  
channels in sequence. However, unlike priority scan, Chan-  
nel 16 is not checked unless Channel 16 is set as a TAG  
channel.  
10  
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SCAN OPERATION 4  
I Setting TAG channels  
I Starting a scan  
For more efficient scanning, add desired channels as TAG  
channels or clear the TAG for unwanted channels.  
Set scan type (Priority or Normal scan) and scan resume  
timer in advance using Set mode. (p. 29)  
Channels that are not tagged will be skipped during scanning.  
TAG channels can be assigned to each channel group  
(U.S.A., International and Canada) independently.  
4
q Push [U/I/C] (both [Y] and [Z]) several times to select the  
desired channel group, if desired.  
w Set TAG channels as described at left.  
q Push [U/I/C] (both [Y] and [Z]) several times to select the  
desired channel group.  
w Select the desired channel to be set as a TAG channel.  
e Push and hold [TAG] (SCAN) for 1 sec. to set the dis-  
played channel as a TAG channel.  
e Make sure the squelch is closed to start a scan.  
r Push [SCAN] to start Priority or Normal scan.  
• “  
” blinks during Priority scan; “  
” blinks during Normal  
scan.  
• When a signal is detected, scan pauses until the signal disap-  
pears or resumes after pausing 5 sec. according to Set mode  
setting. (Channel 16 is still monitored during Priority scan.)  
• Push [Y] or [Z] to check the scanning TAG channels, to change  
the scanning direction or resume the scan manually.  
• “  
” appears in the display.  
r To cancel the TAG channel setting, repeat step e.  
• “  
” disappears.  
• A beep tone sounds and “  
indicator when a signal is received on Channel 16 during Priority  
scan.  
” blinks at the channel comment  
Clearing (or setting) all tagged channels  
While pushing and holding [HI/LO] on the microphone, push  
[TAG] (SCAN) for 3 sec. (until a long beep changes to 2 short  
beeps) to clear all TAG channels in the selected channel group.  
• Repeat above procedure to set all TAG channels.  
t To stop the scan, push [SCAN].  
[Example]: Starting a normal scan.  
Scan starts.  
When a signal is received.  
Push  
Push  
to stop the scan  
11  
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DUALWATCH/TRI-WATCH  
5
I Description  
I Operation  
Dualwatch monitors Channel 16 while you are receiving  
on another channel; Tri-watch monitors Channel 16 and the  
call channel while receiving another channel. Dualwatch/Tri-  
watch are convenient for monitor Channel 16 when you are  
operating on another channel.  
q Select Dualwatch or Tri-watch in Set mode. (p. 29)  
w Select the desired channel.  
e Push and hold [DUAL] (CH/WX) for 1 sec. to start Dual-  
watch or Tri-watch.  
• “ ” blinks during Dualwatch; “ ” blinks during Tri-watch.  
• A beep tone sounds when a signal is received on Channel 16.  
r To cancel Dualwatch or Tri-watch, push [DUAL] (CH/WX).  
DUALWATCH/TRI-WATCH SIMULATION  
Call channel  
[Example]: Operating Tri-watch on INT Channel 25  
Tri-watch starts.  
Push and hold  
for 1 sec.  
Signal is received on call  
channel.  
Dualwatch  
Tri-watch  
• If a signal is received on Channel 16, Dualwatch/Tri-watch  
pauses on Channel 16 until the signal disappears.  
• If a signal is received on the call channel during Tri-watch,  
Tri-watch becomes Dualwatch until the signal disappears.  
To transmit on the selected channel during Dualwatch/Tri-  
watch, push and hold [PTT].  
Signal is received on  
Channel 16 takes priority.  
Tri-watch resumes after  
the signal disappears.  
12  
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DSC OPERATION  
6
I MMSI code programming  
I MMSI code check  
The 9-digit MMSI (Maritime Mobile Service Identity: DSC self  
ID) code can be programmed at power ON.  
The 9-digit MMSI (DSC self ID) code can be checked.  
q Push [DSC] to enter the DSC menu.  
This code programming can be performed only twice.  
w Push [Y] or [Z] to select “  
” and push [DSC].  
5
6
q Turn power OFF.  
w While pushing and holding [DSC], turn power ON to enter  
MMSI code programming condition.  
e After the display appears, release [DSC].  
• A cursor starts blinking.  
e Check the 9-digit MMSI (DSC self ID) code.  
• The MMSI code is displayed and scrolls at the channel comment  
indicator.  
r Edit the specified MMSI code by pushing [Y] or [Z].  
• Push [!] or [CH/WX] to move the cursor forward or backward,  
respectively.  
t Input 9-digit code, then push [DSC] to set the code.  
• Returns to the normal operation.  
MMSI (DSC self ID) code scrolls  
r Push [DSC] to return to the normal operation.  
13  
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6
DSC OPERATION  
I DSC address ID  
A total of 30 DSC address IDs (9-digit) can be programmed  
and named with up to 5 characters.  
r Push [Y] or [Z] to input 9-digit of the appropriate address  
ID.  
• Push [!] or [CH/WX] to move the cursor forward or backward,  
respectively.  
D Programming address ID  
q Push [DSC] to enter the DSC menu.  
• Push [SCAN] to cancel and exit the condition.  
1st digit ‘0’ is fixed for a group ID. When you input 1st digit ‘0’  
and other 8 digits, the ID is automatically registered as a group  
ID.  
w Push [Y] or [Z] to select “  
,” and push [DSC].  
Scrolls  
,” and push [DSC].  
e Push [Y] or [Z] to select “  
t After inputting 9-digit ID, push [DSC] to input 5 characters  
ID name using [Y] or [Z].  
• Push [!] or [CH/WX] to move the cursor forward or backward,  
respectively.  
• Push [SCAN] to cancel and exit the condition.  
y Push [DSC] to program and exit the DSC menu.  
14  
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DSC OPERATION 6  
D Deleting address ID  
q Push [DSC] to enter the DSC menu.  
I Position indication  
w Push [Y] or [Z] to select “  
” and push [DSC].  
When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con-  
nected, the transceiver indicates the current position data in  
seconds of accuracy.  
A NMEA0183 ver. 2.0 or 3.01 (sentence formatters RMC,  
GGA, GNS, GLL) compatible GPS receiver is required. Ask  
your dealer about suitable GPS receivers.  
6
Scrolls  
e Push [Y] or [Z] to select “ ”, then push [DSC].  
Push and hold [POS] (DSC) for 1 sec. to display the cur-  
rent position.  
• When no address ID is programmed, “  
” is displayed.  
• ‘Latitude’ and ‘Longitude’ scroll in sequence at the channel com-  
ment indicator.  
• “  
” scrolls when no GPS is connected.  
r Push [Y] or [Z] to select the desired ID name for deleting  
and push [DSC].  
Scrolls  
• “  
” appears.  
• When the connecting GPS receiver is compatible with  
several sentence formatters, the order of input prece-  
dence is ‘RMC,’ ‘GGA,’ ‘GNS’ and ‘GLL.’  
• “GPS” blinks when the GPS data is invalid.  
t Push [DSC] to delete the address ID and exit the DSC  
menu.  
15  
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6
DSC OPERATION  
I Distress call  
A Distress call should be transmitted if, in the opinion of the  
Master, the ship or a person is in distress and requires imme-  
diate assistance.  
NEVER USE THE DISTRESS CALL WHEN YOUR  
SHIP OR A PERSON IS NOT IN AN EMERGENCY.  
A DISTRESS CALL CAN BE USED ONLY WHEN  
IMMEDIATE HELP IS NEEDED.  
Scrolls  
r After receiving the acknowledgment, reply using the mi-  
crophone.  
• “  
” scrolls at the channel comment indicator.  
q Confirm no Distress call is being received.  
w While opening the key cover, push [DISTRESS] for 5 sec.  
to transmit the Distress call.  
• Emergency channel (Channel 70) is automatically selected and  
the Distress call is transmitted.  
Scrolls  
A distress alert contains;  
• Kinds of distress : Undesignated distress  
• Position data  
: GPS position data held for 23.5 hrs. or until  
the power is turned OFF.  
e After transmitting the call, the transceiver waits for an ac-  
knowledgment call on Channel 70.  
The Distress call is repeated every 3.5–4.5 min., until  
receiving an ‘acknowledgement.’  
Push and hold [DISTRESS] for 5 sec. to transmit a re-  
newed Distress call, if desired.  
• The Distress call is automatically transmitted every 3.5 to 4.5  
minutes.  
• “  
” scrolls at the channel comment indicator.  
Push any key except [DISTRESS] to cancel the ‘Call  
repeat’ mode.  
16  
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DSC OPERATION 6  
I Transmitting DSC calls  
To ensure correct operation of the DSC function, please  
make sure you set the squelch correctly. (p. 7)  
e Push [Y] or [Z] to select a desired intership channel, push  
[DSC].  
• Intership channels are already preset into the transceiver in rec-  
ommended order.  
D Transmitting Individual call  
The Individual call function allows you to transmit a DSC sig-  
nal to a specific ship only.  
• Channel 70 is selected and “  
” appears after pushing  
[DSC].  
6
q Push [DSC] to enter the DSC menu.  
• “  
” scrolls at the channel comment indicator.  
r Push [DSC] to transmit the Individual call.  
• If Channel 70 is busy, the transceiver stands by until the channel  
becomes clear.  
Scrolls  
w Push [DSC] to select the desired pre-programmed individ-  
ual address using [Y] or [Z], then push [DSC].  
• The ID code for the individual call must be set in advance.  
(p. 14)  
• Routine category only is available.  
While transmitting  
When Ch 70 is busy.  
17  
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6
DSC OPERATION  
t After transmitting the Individual call, standby on Channel  
D Transmitting Individual acknowledgement  
When receiving an Individual call, you can transmit an ac-  
knowledgement (‘Able to comply’ or ‘Unable to comply’) by  
using the on screen prompts (see page 25 for details). You  
can also send an acknowledgement through the menu sys-  
tem as follows.  
70 until an acknowledgement is received.  
• “  
” scrolls at the channel comment indicator.  
q Push [DSC] to enter the DSC menu.  
w Push [Y] or [Z] to select “  
” and push [DSC].  
Scrolls  
• “  
” item appears after an Individual call is received.  
y When the acknowledgement ‘Able to comply’ is received,  
the specified channel (in step e) is selected with beeps  
automatically. Or, when the acknowledgement ‘Unable to  
comply’ is received, the display returns to the operated  
channel (before entering the DSC menu) with beeps.  
• “  
” item disappears if another call is received after the  
Individual call.  
• The Individual acknowledgement can be transmitted to the last  
received individual call only.  
• “  
” or “  
” scrolls at the channel  
comment indicator.  
‘Able to comply’  
is received  
Scrolls  
e Push [Y] or [Z] to select the acknowledgement “  
.”  
” or  
Scrolls  
u Push and hold [PTT] to communicate your message to the  
responding ship when ‘Able to comply’ is received.  
18  
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DSC OPERATION 6  
D Transmitting Group call  
The Group call function allows you to transmit a DSC signal  
to a specific group only.  
r Push [DSC] to enter the standby condition for Individual  
acknowledgement call.  
• “  
” appears at the channel comment indicator.  
q Push [DSC] to enter the DSC menu.  
w Push [Y] or [Z] to select “  
,” and push [DSC].  
6
t Push [DSC] to transmit the acknowledgement to the se-  
lected station.  
e Push [Y] or [Z] to select the desired pre-programmed  
group address, and push [DSC].  
• The ID code for the group call must be set in advance. (p. 14)  
y After the Individual acknowledgement has been transmit-  
ted, the display changes to the channel specified by the  
calling station automatically when “  
” is selected.  
Scrolls  
19  
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6
DSC OPERATION  
r Push [Y] or [Z] to select the desired intership channel,  
and push [DSC].  
y After the Group call has been transmitted, the display  
changes to the previously specified channel.  
• Channel 70 is selected and “  
” appears.  
Scrolls  
u Push and hold [PTT] to communicate your message to the  
responding ship.  
t Push [DSC] to transmit the Group call.  
• If Channel 70 is busy, the transceiver stands by until the channel  
becomes clear.  
• Routine category only is available.  
While transmitting  
20  
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DSC OPERATION 6  
D Transmitting All Ships call  
r Push [DSC] to transmit the All Ships call.  
Large ships use Channel 70 as their ‘listening channel.’  
When you want to announce a message to these ships, use  
• Routine category only is available.  
• Low power is selected.  
the All Ships call’ function.  
q Push [DSC] to enter the DSC menu.  
w Push [Y] or [Z] to select “  
.”  
6
While transmitting  
t After the All Ships call has been transmitted, the display  
changes to Channel 16 automatically.  
Scrolls  
e Push [DSC] to enter the standby condition for All Ships  
call.  
• Channel 70 is selected and “  
” appears.  
Scrolls  
21  
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6
DSC OPERATION  
D Transmitting Position Request call  
Transmit a Position Request call when you want to know a  
specified ship’s current position, etc.  
r Push [DSC] to enter the standby condition for Position Re-  
quest call.  
• Channel 70 is selected and “  
” appears.  
q Push [DSC] to enter the DSC menu.  
w Push [Y] or [Z] to select “  
,” then push [DSC].  
t Push [DSC] to transmit the Position Request call.  
Scrolls  
e Push [Y] or [Z] to select the desired pre-programmed in-  
dividual address.  
• The ID code for position request must be set in advance. (p. 14)  
While transmitting  
y After the Position Request call has been transmitted, the  
following indication is displayed.  
• “  
” scrolls at the channel comment indicator.  
Scrolls  
u Push any key to exit the condition and return to the normal  
operation.  
22  
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DSC OPERATION 6  
D Transmitting Position Report call  
Transmit a Position Report call when you want to announce  
your own position to a specific ship and to get an answer, etc.  
r Push [DSC] to enter the standby condition for Position Re-  
port call.  
• Channel 70 is selected and “  
” appears.  
q Push [DSC] to enter the DSC menu.  
w Push [Y] or [Z] to select “  
,” and push [DSC].  
6
t Push [DSC] to transmit the Position Report call.  
Scrolls  
e Push [Y] or [Z] to select the desired pre-programmed in-  
dividual address.  
• The ID code for the position report call can be set in advance.  
(p. 14)  
While transmitting  
y After the Position Report call has been transmitted, stand  
by on Channel 70 until an acknowledgement is received.  
• “  
” scrolls at the channel comment indicator.  
Scrolls  
u Push any key to exit the condition and return to the normal  
operation.  
23  
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6
DSC OPERATION  
I Receiving DSC calls  
D Receiving a Distress call  
While monitoring Channel 70 and a Distress call is received:  
The emergency alarm sounds.  
D Receiving a Distress acknowledgement  
While monitoring Channel 70 and a Distress acknowledge-  
ment to other ship is received:  
• Push any key to stop the alarm.  
The emergency alarm sounds.  
DSC” appears and “  
” scrolls at the channel  
• Push any key to stop the alarm.  
comment indicator, then Channel 16 is automatically se-  
DSC” appears and “  
” scrolls at the chan-  
lected.  
nel comment indicator, then Channel 16 is automatically  
selected.  
Continue monitoring Channel 16 as a coast station may re-  
quire assistance.  
Scrolls  
Scrolls  
D Receiving a Distress Relay call  
While monitoring Channel 70 and a Distress Relay acknowl-  
edgement is received:  
The emergency alarm sounds.  
• Push any key to stop the alarm.  
DSC” appears and “  
” scrolls at the channel com-  
ment indicator, then Channel 16 is automatically selected.  
Scrolls  
24  
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DSC OPERATION 6  
D Receiving an Individual call  
While monitoring Channel 70 and an Individual call is re-  
ceived:  
The emergency alarm or beeps sound depending on the  
received category.  
D Receiving a Group call  
While monitoring Channel 70 and a Group call is received:  
The emergency alarm or beeps sound depending on the  
received category.  
DSC” appears and “  
” scrolls at the channel  
DSC” appears and “  
” scrolls at the channel  
comment indicator.  
6
comment indicator.  
Push any key to stop beep, then push [DSC] to select the  
channel specified by the calling station for voice commu-  
nication; push any other key to ignore the Group call.  
Push any key to stop beep, then push [DSC] to reply the  
call and select the channel specified by the calling station  
for voice communication (depending on your replying con-  
dition see p. 18 for individual acknowledgement call pro-  
cedure for details.); push any other key to ignore the Indi-  
vidual call.  
Scrolls  
Scrolls  
25  
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6
DSC OPERATION  
D Receiving an All Ships call  
D Receiving a Geographical Area call  
While monitoring Channel 70 and a Geographical Area call  
(for the area you are in) is received:  
The emergency alarm or beeps sound depending on the  
received category.  
While monitoring Channel 70 and an All Ships call is received:  
The emergency alarm sounds when the category is ‘Dis-  
tress’ or ‘Urgency’; 2 beeps sound for other categories.  
DSC” appears and “  
” scrolls at the channel  
comment indicator.  
DSC” appears and “  
” scrolls at the chan-  
Push any key to stop beep, then push [DSC] to monitor  
channel 16 for an announcement from the calling vessel,  
push any other key to ignore the call.  
nel comment indicator.  
Push any key to stop the beep, then push [DSC] to change  
to the channel specified by the calling station for voice  
communication; push any other key to ignore the Geo-  
graphical Area call.  
Monitor the selected channel for an announcement from  
the calling station.  
Scrolls  
Scrolls  
When no GPS receiver is connected or if there is a prob-  
lem with the connected receiver, all Geographical Area  
calls are received, regardless of your position.  
26  
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DSC OPERATION 6  
D Receiving a Position Request call  
While monitoring Channel 70 and a Position Request call is  
received:  
D Receiving a Position Reply call  
While monitoring Channel 70 and a Position Reply call is re-  
ceived:  
DSC” appears and “  
nel comment indicator.  
Push any key to stop the beep, then push [DSC] to reply to  
” scrolls at the chan-  
DSC” and “POS REPLY” appear in the display.  
• The ‘Latitude’ and ‘Longitude’ from the called station is displayed  
and scrolled automatically in order of Latitude co-ordinates and  
then Longitude co-ordinates.  
the call; push any other key to ignore the call.  
Push any key to stop the beep.  
6
Scrolls  
Scrolls  
D Receiving a Position Report call  
While monitoring Channel 70 and a Position Report call is re-  
ceived:  
D Receiving a Position Report Reply call  
While monitoring Channel 70 and a Position Report Reply call  
is received:  
DSC” and “POS REPLY” appear in the display.  
• The ‘Latitude’ and ‘Longitude’ you have sent is displayed and  
scrolled automatically in order of Latitude co-ordinates and then  
Longitude co-ordinates.  
DSC” appears and “  
” scrolls at the chan-  
nel comment indicator.  
Push any key to stop the beep, then push [DSC] to reply to  
the call; push any other key to ignore the call.  
• The ‘Latitude’ and ‘Longitude’ from the called station is displayed  
and scrolled automatically in order of Latitude co-ordinates and  
then Longitude co-ordinates after replying the call.  
Push any key to stop the beep.  
Scrolls  
Scrolls  
27  
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SET MODE  
7
I Set mode programming  
Set mode is used to change the conditions of the trans-  
ceiver’s functions: Scan type (Normal or Priority,) Scan re-  
sume timer, Weather alert, Dual/Tri-watch, DSC watch, Beep  
tone, Auto acknowledgement and Favorite channel function.  
D Set mode operation  
q Turn power OFF.  
w While pushing [!], turn power ON to enter Set mode.  
e After the display appears, release [!].  
• “  
” appears at the channel comment indicator.  
Available functions may differ depending on dealer setting.  
r Push [!] to select the desired item, if necessary.  
t Push [Y] or [Z] to select the desired condition of the item.  
y Turn power OFF, then ON again to exit Set mode.  
D Set mode construction  
Scan type  
Scan resume timer  
Weather alert  
Dual/Tri-watch  
Starting item  
Push  
Favorite channel function  
Auto acknowledgement  
Beep tone  
DSC watch  
Scrolls  
Scrolls  
Scrolls  
28  
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SET MODE 7  
I Set mode items  
D
D Scan type  
Weather alert  
The transceiver has 2 scan types: Normal scan and Priority  
scan. Normal scan searches all TAG channels in the selected  
channel group. Priority scan searches all TAG channels in se-  
quence while monitoring Channel 16.  
A NOAA broadcast station transmits a weather alert tone be-  
fore important weather information. When the weather alert  
function is turned ON, the transceiver detects the alert, then  
the “WX ALT” indicator blinks until the transceiver is operated.  
The previously selected (used) weather channel is checked  
any time while scanning.  
• “WX ALT” appears instead of “WX” indication when the function is  
set ON.  
7
Normal scan (default)  
Priority scan  
D
Scan resume timer  
The scan resume timer can be selected as a pause (OFF) or  
timer scan (ON). When OFF is selected, the scan pauses  
until the signal disappears. When ON is selected, the scan  
pauses 5 sec. and resumes even if a signal has been re-  
ceived on any other channel than Channel 16.  
Weather alert OFF (default)  
Weather alert ON  
D
Dual/Tri-watch  
This item can be selected as Dualwatch or Tri-watch. (p. 12)  
Dualwatch (default)  
Tri-watch  
Scan timer OFF (default)  
Scan timer ON  
29  
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7
SET MODE  
D
D
DSC watch  
Automatic acknowledgement  
DSC watch monitors Channel 70 while you are receiving an-  
other channel.  
This item sets the Automatic acknowledgement function ON  
or OFF.  
If a distress signal is received on Channel 70, the transceiver  
monitors Channel 16 and 70 alternately until the distress sig-  
nal disappears. If a signal is received on another channel,  
DSC watch pauses until the signal disappears.  
When Position Request call or Position Report call is re-  
ceived, transceiver automatically transmits Position Request  
Reply call or Position Report Reply call, respectively.  
• “  
” scrolls at the channel comment indicator.  
This function may not be available for some channel  
groups depending on dealer setting.  
• “  
” scrolls at the channel comment indicator.  
Auto acknowledgement  
Auto acknowledgement  
ON  
OFF (default)  
D
Favorite channel  
DSC watch OFF (default)  
DSC watch ON  
This item sets the Favorite channel function ON or OFF.  
The favorite channel is programmed by the TAG channel set-  
ting (p. 11).  
When the Favorite channel function is turned ON, [Y]/[Z]  
keys on the microphone select the favorite channels in the  
selected channel group in sequence when pushed.  
D
Beep tone  
You can select silent operation by turning beep tones OFF or  
you can have confirmation beeps sound at the push of a key  
by turning beep tones ON.  
“  
” scrolls at the channel comment indicator.  
Beep tone ON (default)  
Beep tone OFF  
Favorite CH ON (default)  
Favorite CH OFF  
30  
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CONNECTIONS AND MAINTENANCE  
8
I Connections  
e DC POWER CONNECTOR  
q
w
Connects the supplied DC power cable from this connector  
to an external 13.8 V DC power source.  
e
CAUTION: After connecting the DC power cable, GPS  
receiver lead and external speaker lead, cover the con-  
nector and leads with an adhesive tape as shown  
below, to prevent water seeping into the transceiver.  
r
7
8
Rubber vulcanizing  
tape  
q EXTERNAL SPEAKER LEAD  
Connects to an external speaker.  
Blue: Speaker (+)  
r ANTENNA CONNECTOR  
Gray: Speaker ( )  
Connects a marine VHF antenna with a PL-259 connector  
to the transceiver.  
CAUTION: Transmitting without an antenna may dam-  
age the transceiver.  
w GPS RECEIVER LEAD  
Connects to a GPS receiver for position indication.  
• An NMEA0183 ver. 2.0 or 3.01 (sentence formatters RMC, GGA,  
GNS, GLL) compatible GPS receiver is required. Ask your dealer  
about suitable GPS receivers.  
Yellow: NMEA IN (+)  
Green: NMEA IN ( )  
31  
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8
CONNECTIONS AND MAINTENANCE  
I Supplied accessories  
I Antenna  
The following accessories are supplied:  
A key element in the performance of any communication sys-  
tem is the antenna. Ask your dealer about antennas and the  
best place to mount them.  
Mounting bracket  
For mounting bracket  
Knob bolts  
Screws (5×20)  
I Fuse replacement  
Flat washers Spring washers  
One fuse is installed in the supplied DC power cable. If a fuse  
blows or the transceiver stops functioning, track down the  
source of the problem, if possible, and replace the damaged  
fuse with a new, rated one.  
(M5)  
(M5)  
Microphone hanger  
DC power cable  
and screws (3×16)  
I Cleaning  
If the transceiver becomes dusty or dirty, wipe it clean with a  
soft, dry cloth.  
Warning sticker  
AVOID the use of solvents such as benzene or al-  
cohol, as they may damage transceiver surfaces.  
32  
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CONNECTIONS AND MAINTENANCE 8  
I Mounting the transceiver  
I Optional MB-92 attachment  
An optional MB-92 DUST COVER is available for attaching the  
transceiver’s front panel to prevent the keys and knobs get-  
ting wet when the transceiver is not used.  
D
Using the supplied mounting bracket  
The universal mounting bracket supplied with your transceiver  
allows overhead or dashboard mounting.  
Attach the optional MB-92 DUST COVER to the transceiver  
• Mount the transceiver securely with the 2 supplied screws  
(5 × 20) to a surface which is more than 10 mm thick and  
can support more than 5 kg.  
as shown below.  
• Mount the transceiver so that the face of the transceiver is at  
90° to your line of sight when operating it.  
CAUTION: KEEP the transceiver and microphone at least  
1 meter away from your vessel’s magnetic navigation com-  
pass.  
8
NOTE: Check the installation angle; the function display  
may not be easy-to-read at some angles.  
EXAMPLE  
33  
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8
CONNECTIONS AND MAINTENANCE  
I Optional MB-69 installation  
An optional MB-69 FLUSH MOUNT is available for mounting the  
transceiver to a flat surface such as an instrument panel.  
e Attach the clamps on either side of the transceiver with 2  
supplied bolts (5 × 8 mm).  
• Make sure that the clamps align parallel to the transceiver body.  
CAUTION: KEEP the transceiver and microphone at least  
1 meter away from your vessel’s magnetic navigation com-  
pass.  
q Using the template on p. 39, carefully cut a hole into the  
instrument panel (or wherever you plan to mount the trans-  
ceiver.)  
w Slide the transceiver through the hole as shown below.  
r Tighten the end bolts on the clamps (rotate clockwise) so  
that the clamps press firmly against the inside of the in-  
strument control panel.  
t Tighten the locking nuts (rotate counterclockwise) so that  
the transceiver is securely mounted in position as below.  
y Connect the antenna and power cable, then return the in-  
strument control panel to its original place.  
34  
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TROUBLESHOOTING  
9
PROBLEM  
POSSIBLE CAUSE  
SOLUTION  
REF.  
The transceiver does • Bad connection to the power supply.  
not turn ON.  
• Check the connection to the transceiver.  
p. 31  
No sound from speaker. • Squelch level is too high.  
• Volume level is too low.  
• Set squelch to the threshold point.  
• Set [VOL] to a suitable level.  
• Drain water from the speaker.  
p. 7  
p. 7  
p. 9  
• Speaker has been exposed to water.  
Transmitting is impossi- • Some channels are for low power or re- • Change channels.  
ble, or high power can ceive only.  
pgs. 5,  
6, 36  
not be selected.  
• The output power is set to low.  
• Push [HI/LO] on the microphone to select p. 7  
high power.  
8
9
Scan does not start.  
No beeps.  
• “TAG” channel is not programmed.  
• Beep tones are turned OFF.  
• Set the desired channels as “TAG” channels. p. 11  
• Turn the beep tone ON in Set mode.  
p. 30  
p. 13  
Distress call cannot be • MMSI (DSC self ID) code is not pro- • Program the MMSI (DSC self ID) code.  
transmitted. grammed.  
35  
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CHANNEL LIST  
10  
Channel number Frequency (MHz)  
Channel number Frequency (MHz)  
USA INT CAN Transmit Receive  
Channel number Frequency (MHz)  
USA INT CAN Transmit Receive  
Channel number Frequency (MHz)  
USA INT CAN Transmit Receive  
USA INT CAN Transmit Receive  
01  
01 156.050 160.650  
156.050 156.050  
21  
21 157.050 161.650  
21A 157.050 157.050  
21b Rx only 161.650  
157.100 161.700  
68  
68  
68 156.425 156.425  
86A  
87  
157.325 157.325  
87 157.375 161.975  
157.375 157.375  
01A  
21A  
22A  
69  
69  
69 156.475 156.475  
87  
88  
02  
03  
02 156.100 160.700  
03 156.150 160.750  
156.150 156.150  
70*3 70*3 70*3 156.525 156.525  
87A  
88  
22  
23  
71  
72  
73  
74  
71  
72  
73  
74  
71 156.575 156.575  
72 156.625 156.625  
73 156.675 156.675  
74 156.725 156.725  
88 157.425 162.025  
157.425 157.425  
03A  
22A 157.100 157.100  
23 157.150 161.750  
157.150 157.150  
88A  
04  
05  
156.200 160.800  
04A 156.200 156.200  
156.250 160.850  
23A  
24  
24  
25  
24 157.200 161.800  
25 157.250 161.850  
25b Rx only 161.850  
26 157.300 161.900  
27 157.350 161.950  
28 157.400 162.000  
28b Rx only 162.000  
60 156.025 160.625  
156.075 160.675  
75*1 75*1 75*1 156.775 156.775  
76*1 76*1 76*1 156.825 156.825  
77*1 77 77*1 156.875 156.875  
05A  
06  
05A 156.250 156.250  
06 156.300 156.300  
156.350 160.950  
25  
06  
07  
26  
27  
28  
26  
27  
28  
78  
79  
80  
81  
82  
83  
156.925 161.525  
78A 156.925 156.925  
156.975 161.575  
07A  
08  
09  
10  
11  
12  
07A 156.350 156.350  
08 156.400 156.400  
09 156.450 156.450  
10 156.500 156.500  
11 156.550 156.550  
12 156.600 156.600  
78A  
79A  
80A  
81A  
82A  
83A  
08  
09  
10  
11  
12  
79A 156.975 156.975  
157.025 161.625  
60  
61  
80A 157.025 157.025  
157.075 161.675  
Frequency (MHz)  
61A  
61A 156.075 156.075  
156.125 160.725  
WX channel  
13*2 13 13*1 156.650 156.650  
14 14 14 156.700 156.700  
15*2 15*1 15*1 156.750 156.750  
16 16 16 156.800 156.800  
17*1 17 17*1 156.850 156.850  
62  
63  
64  
65  
81A 157.075 157.075  
157.125 161.725  
Transmit  
RX only  
RX only  
RX only  
RX only  
RX only  
RX only  
RX only  
RX only  
RX only  
RX only  
Receive  
162.550  
162.400  
162.475  
162.425  
162.450  
162.500  
162.525  
161.650  
161.775  
163.275  
62A 156.125 156.125  
156.175 160.775  
1
2
82A 157.125 157.125  
83 157.175 161.775  
83A 157.175 157.175  
83b Rx only 161.775  
84 157.225 161.825  
157.225 157.225  
63A  
64A  
156.175 156.175  
3
64 156.225 160.825  
64A 156.225 156.225  
156.275 160.875  
4
18  
156.900 161.500  
18A 156.900 156.900  
156.950 161.550  
5
18A  
84  
84A  
85  
84  
85  
86  
6
19  
65A 65A 65A 156.275 156.275  
66 156.325 160.925  
66A 66A 66A*1 156.325 156.325  
67*2 67  
67 156.375 156.375  
7
19A  
20  
19A 156.950 156.950  
85 157.275 161.875  
157.275 157.275  
8
20 20*1 157.000 161.600  
85A  
86  
9
20A  
157.000 157.000  
86 157.325 161.925  
10  
*1 Low power only. *2 Momentary high power. *3 DSC operation only.  
NOTE: Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CANNOT  
be lawfully used by the general public in U.S.A. waters.  
36  
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SPECIFICATIONS AND OPTIONS  
11  
I Specications  
ï
ï
General  
Receiver  
• Frequency coverage  
: Transmit156.025–157.425 MHz  
Receive 156.050–163.275 MHz  
: FM (16K0G3E)  
DSC (16K0G2B)  
: 25 kHz  
• Receive system  
: Double conversion  
superheterodyne  
: 0.22 µV (typical)  
: Less than 0.22µV  
: More than 70 dB  
• Mode  
• Sensitivity (12 dB SINAD)  
• Squelch sensitivity  
• Intermodulation rejection ratio  
• Channel spacing  
• Current drain (at 13.8 V)  
: TX (at 25 W) 5.5 A max.  
• Spurious response rejection ratio : More than 70 dB  
Max. audio  
• Power supply requirement : 13.8 V DC 15%  
• Frequency stability : 10 ppm  
• Operating temperature range: –20°C to +60°C; –4°F to +140°F  
1.5 A max.  
• Adjacent channel selectivity  
• Audio output power  
: More than 70 dB  
: 4.5 W (typical) at 10%  
distortion with a 4 load  
• Dimensions  
(Projections not included)  
• Weight  
: 153(W) × 67(H) × 133(D) mm  
6 132(W) × 2 58(H)× 5 14(D) in  
: Approx. 825 g ; 1.8 lb  
All stated specications are subject to change without notice or  
obligation.  
10  
11  
ï
Transmitter  
• Output power  
: 25 W (High) and 1 W (Low)  
: Variable reactance frequency modu-  
lation  
• Modulation system  
• Max. frequency deviation  
• Spurious emissions  
:
5.0 kHz  
: Less than –70 dBc (High)  
Less than –56 dBc (Low)  
: More than 70 dB  
• Adjacent channel power  
37  
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11 SPECIFICATIONS  
D
Dimensions  
I Options  
137.0 (5 1332)  
MB-69 FLUSH MOUNT KIT  
For mounting the transceiver to a panel.  
MB-92 DUST COVER  
For attaching to the front panel of the transceiver to protect it  
when not in use.  
153.0 (6 132)  
42.2  
86.3 (3 1332)  
(1 2132)  
Unit: mm (inch)  
38  
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TEMPLATE  
12  
153.0 (6 132)  
139.0 (5 1532)  
11  
12  
Unit: mm (inch)  
NOTE: The solid line is the line to use when cutting into the dash/helm. The dotted  
line shows the outline of the IC-M304’s front panel once the radio is fitted into the  
hole. Do not follow the dotted line when making the hole in your dash/helm.  
39  
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MEMO  
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A-6542D-1US  
Printed in Japan  
© 2006 Icom Inc.  
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan  
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