ICOM orporated 349300 VHF Marine Transceiver User Manual
ICOM Incorporated VHF Marine Transceiver
User manual

INSTRUCTION MANUAL
iM323
iM323G
iM324
iM324G
VHF MARINE TRANSCEIVER
This  device  complies  with  Part  15  of  the  FCC 
Rules. Operation is subject  to  the  condition  that 
this device does not cause harmful interference.

i
FOREWORD
Thank you for purchasing this Icom product. The IC-M323/
IC-M323G/IC-M324/IC-M324G  V H F  M A R I N E  T R A N S C E I V E R   is 
designed and built with Icom’s state of the art technology and 
craftsmanship. With proper care, this product should provide 
you with years of trouble-free operation.
We appreciate you making the IC-M323, IC-M323G, IC-M324, 
or IC-M324G your radio of choice, and hope you agree with 
Icom’s philosophy of “technology first.” Many hours of research 
and development went into the de sign of your radio.
FEATURES D
❍ Simple operation with large keys
❍ Easy to hear speaker
❍ Built-in DSC meets ITU Class D requirement
❍ Rugged waterproof construction
❍  Easy to make an individual DSC calls using the 
optional MA-500TR Class B AIS Transponder
IMPORTANT
READ ALL INSTRUCTIONS carefully and completely 
before using the transceiver.
SAVE THIS  INSTRUCTION  MANUAL  —  This  in-
struction  manual  contains  important  operating  instructions 
for the transceiver.
EXPLICIT DEFINITIONS
WORD DEFINITION
RWARNING! Personal  injury,  fire  hazard  or  electric 
shock may occur.
CAUTION Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No risk 
of personal injury, fire or electric shock.
CLEAN THE TRANSCEIVER AND MICROPHONE THOR-
OUGHLY WITH  FRESH WATER  after  exposure to  water 
including salt, otherwise, the keys and switch may become 
inoperable due to salt crystallization.

IN CASE OF EMERGENCY
If your vessel requires assistance, contact other vessels and 
the Coast Guard by sending a Distress call on Channel 16.
Or, transmit your Distress call using digital selective calling 
on Channel 70. 
USING CHANNEL 16
DISTRESS CALL PROCEDURE
1.  “MAYDAY MAYDAY MAYDAY.”
2.  “THIS IS ...............” (name of vessel).
3.   Say your call sign or other description of the vessel (AND 
9 digit DSC ID if you have one).
4.  “LOCATED AT ...............” (your position).
5.  State the nature of the distress and assistance required.
6.   Give any other information which might facilitate the res-
cue.
USING DIGITAL SELECTIVE CALLING (Ch 70)
DISTRESS CALL PROCEDURE
1.   While  lifting  up  the key cover, hold  down  [DISTRESS] 
for 3 seconds until you hear 3 short beeps and then one 
long beep.
2.   Wait for an acknowledgment on Channel 70 from a coast 
station.
    -
matically selected.
3.   Hold down [PTT], then transmit the appropriate informa-
tion as listed above.
ii
INSTALLATION NOTE
Installation:
The installation of this equipment should be made in such a 
manner as to respect the EC recommended electromagnetic 
field exposure limits. (1999/519/EC)
The  maximum  RF  power  available  from  this  device  is  25 
watts. The antenna should be installed as high as possible 
for maximum efficiency and the installation height should be 
at least 1.4 meters above any accessible position. In the case 
where an antenna cannot be installed at a reasonable height, 
then the transmitter should neither be continuously operated 
for long periods if any person is within a distance of 1.4 me-
ters of the antenna, nor operated at all if any person is touch-
ing the antenna.
It is recommended that antenna of a maximum gain of 3 dB 
are  used.  If  higher  gain  antenna  are  required  then  please 
contact your Icom distributor for  revised installation  recom-
mendations.
Operation:
The exposure to RF electromagnetic field is only applicable 
when  this  device  is  transmitting. This exposure is  naturally 
reduced due to the nature of alternating periods of receiving 
and  transmitting.  Keep  your  transmissions  to  the  minimum 
necessary.

iii
11 CHAPTER CONTINUED
RADIO OPERATOR WARNING
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 mini-
mum 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 com-
pliance requirements. 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.
For watercraft without suitable structures, the antenna must 
be mounted so as to maintain a minimum of 1 meter verti-
cally 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 al-
lowable MPE level set by FCC.
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.
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.

iv
11
CHAPTER CONTINUED
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AVERTISSEMENT POUR LES OPÉRATEURS RADIO
Icom exige que l'opérateur radio se conforme aux 
exigences de la FCC en matière d'exposition aux 
radiofréquences. Une antenne omnidirectionnelle 
dont le gain ne dépasse pas 9dBi doit être fixée 
à  une  distance  minimale  de  5  mètres  (mesurée 
depuis le point le plus bas de l'antenne) verticale-
ment au-dessus du pont principal et  de tout  le personnel  qui peut 
s'y trouver. Il s'agit de la distance de sécurité minimale prévue pour 
satisfaire aux exigences de conformité en matière d'exposition aux 
RF. Cette distance de 5 mètres est établie en fonction de l'exposition 
maximale admissible sécuritaire de 3 mètres établie par la FCC, à 
laquelle on ajoute la hauteur d'un adulte (2 mètres); cette distance 
convient pour tous les navires.
Dans le cas des embarcations sans structure convenable, l'antenne 
doit être fixée de façon à maintenir une distance minimale de 1 mètre 
verticalement entre cette antenne (mesurée depuis son point le plus 
bas)  et  la  tête  de  toute  personne  présente;  toutes  les  personnes 
présentes doivent se tenir à l'extérieur d'un rayon d'exposition maxi-
male admissible de 3 mètres.
Ne  pas  émettre  à  l'aide  de  la  radio  et  de  l'antenne  lorsque  des 
personnes se trouvent à l'intérieur du rayon d'exposition maximale 
admissible de cette antenne, à moins que ces personnes (comme 
le conducteur  ou  l'opérateur radio)  ne  soient protégées du  champ 
de  l'antenne  par  un  écran  métallique  relié  à  la  masse.  Le  rayon 
d'exposition maximale  admissible  équivaut  à  la  distance  minimale 
que cette personne doit maintenir entre elle et l'axe de l'antenne pour 
éviter une exposition aux RF supérieure au niveau d'exposition maxi-
male admissible fixé par la FCC.
LE NON-RESPECT DE CES LIMITES PEUT CAUSER, POUR LES 
PERSONNES SITUÉES DANS LE RAYON D'EXPOSITION MAXI-
MALE ADMISSIBLE, UNE ABSORPTION DE RAYONNEMENT DE 
RF  SUPÉRIEURE  À  L'EXPOSITION  MAXIMALE  ADMISSIBLE 
FIXÉE PAR LA FCC.
L'OPÉRATEUR  RADIO  EST  RESPONSABLE  D'ASSURER  QUE 
LES LIMITES D'EXPOSITION MAXIMALE ADMISSIBLE SOIENT 
RESPECTÉES EN TOUT TEMPS PENDANT LA TRANSMISSION 
RADIO.  L'OPÉRATEUR  RADIO  DOIT  S'ASSURER  QU'AUCUNE 
PERSONNE PRÉSENTE NE SE SITUE À L'INTÉRIEUR DU RAY-
ON D'EXPOSITION MAXIMALE ADMISSIBLE.
Établir le rayon d'exposition maximale admissible
ON ESTIME QUE LE RAYON D'EXPOSITION MAXIMALE ADMIS-
SIBLE EST D'ENVIRON 3 M, TEL QUE STIPULÉ DANS LE BUL-
LETIN OET 65 DE  LA FCC. CETTE DISTANCE ESTIMÉE TIENT 
COMPTE D'UN SYSTÈME INSTALLÉ SUR UN NAVIRE UTILISANT 
LA PUISSANCE MAXIMALE DE LA RADIO ET DES ANTENNES 
DONT LE GAIN MAXIMAL EST DE 9dBi.
AVERTISSEMENT

v
FCC INFORMATION
•FORCLASSAUNINTENTIONALRADIATORS:
This equipment has been tested and found to comply with the 
limits for a Class A digital device, pursuant to part 15 of the 
FCC Rules. These limits are designed to provide reasonable 
protection against harmful interference when the equipment 
is  operated  in  a  commercial  environment.  This  equipment 
generates,  uses,  and  can  radiate  radio  frequency  energy 
and, if not installed and used in accordance with the instruc-
tion manual, may cause harmful interference to  radio com-
munications.
Operation of this equipment in a residential area is likely to 
cause harmful interference in which case the user will be re-
quired to correct the interference at his own expense.
NOTE
INFORMATION FCC
•POUR LES RAYONNEMENTS NON INTENTIONNELS DE
CLASSEA:
Cet équipement a été testé et reconnu conforme aux limites fixées 
pour  un  appareil  numérique  de  classe  A,  conformément  au  point 
15 de la réglementation FCC. Ces limites sont définies de façon à 
fournir une protection raisonnable contre le brouillage préjudiciable 
lorsque cet appareil est utilisé dans un environnement commercial. 
Cet équipement génère, utilise et peut émettre un rayonnement de 
fréquence radio. S'il n'a pas été installé conformément aux instruc-
tions, il peut par ailleurs créer des interférences perturbant les com-
munications radio.
L'utilisation de cet appareil dans une zone résidentielle peut provo-
quer un brouillage préjudiciable, auquel cas l'utilisateur sera tenu de 
corriger la situation à ses frais.
NOTE
A WARNING STICKER is supplied with the 
U.S.A. version transceiver.
To  comply  with  FCC  regulations,  this  sticker 
must  be  affixed  in  such  a  location  as  to  be 
readily seen from the operating controls of the 
radio as in the diagram below. Make sure the 
chosen location is clean and dry before apply-
ing the sticker.
UN  AUTOCOLLANT  D'AVERTISSEMENT  est 
fourni  avec  la  version  américaine  de  l'émetteur-
récepteur.
Selon  la  réglementation  du  FCC,  cet  autocollant 
doit être placé à un endroit où il sera vu facilement 
par l'utilisateur aux commandes de la radio, comme 
l'illustre le diagramme ci-dessous. Assurez-vous que 
la  surface  est  propre  et  sèche  avant  d'y  appliquer 
l'autocollant.
WARNING.
EXAMPLE EXEMPLE

vi
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PRECAUTIONS
Icom, Icom Inc. and the Icom logo  are registered trademarks of Icom Incor-
porated (Japan) in Japan, the United States, the United Kingdom, Germany, 
France, Spain, Russia and/or other countries. 
RWARNING!  NEVER
connect  the  transceiver  to  an  AC 
outlet. This may pose a fire hazard or result in an electric shock.
RWARNING! NEVER connect the transceiver to a pow-
er source of more than 16 V DC or use reverse polarity. This 
will ruin the transceiver.
RWARNING! NEVER cut the DC power cable between 
the DC plug at the back of the transceiver and fuse holder. If 
an incorrect connection is made after cutting, the transceiver 
may be damaged.
CAUTION: NEVER
place  the  transceiver  where  normal 
operation  of  the  vessel  may  be  hindered  or  where  it  could 
cause bodily injury.
KEEP the transceiver and  microphone  at least 1  m  away 
from the vessel’s magnetic navigation compass.
DO NOT  use  or place the  transceiver  in areas with  tem-
peratures below –20°C (–4°F) or above +60°C (+140°F) or, in 
areas subject to direct sunlight, such as the dashboard.
DO NOT use harsh solvents such as benzine or alcohol to 
clean the transceiver, as they will damage the transceiver’s 
surfaces.  If  the  transceiver  becomes  dusty  or  dirty,  wipe  it 
clean with a soft, dry cloth.
DO NOT disassemble or modify the transceiver for any rea-
son.
BE  CAREFUL! The  transceiver rear  panel  will  become 
hot when operating continuously for long periods of time.
Place the transceiver in a secure place to avoid inadvertent 
use by children.
BE CAREFUL! The transceiver meets IPX7* requirements 
for waterproof protection. However, once the transceiver has 
been dropped, waterproof protection cannot be guaranteed 
because of possible damage to the transceiver’s case or the 
waterproof seal.
*  Except for the DC  power connector,  NMEA  In/Out  leads  and  AF 
Out leads.
For U.S.A. only
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.

vii
PRÉCAUTIONS
RAVERTISSEMENT! NE JAMAIS
connecter l’emetteur-
recepteur a une alimentation CA au risque de provoquer un in-
cendie ou un choc electrique.
R
AVERTISSEMENT!
NE  JAMAIS
  connecter  
l’émetteur-récepteur  à  une  alimentation  d’une  tension  su-
périeure à 16 V CC, ni inverser la polarité, au risque de détru-
ire l’émetteur-récepteur.
R
AVERTISSEMENT!
NE JAMAIS
 sectionner le câble 
d'alimentation  CC  entre  la  prise  CC  de  la  face  arrière  de 
l'émetteur-récepteur et le porte-fusible. L’émetteur-récepteur 
peut être endommagé par la suite en cas de connexion inap-
propriée.
MISE EN GARDE:
NE  JAMAIS
installer  l’émetteur-
récepteur à  un emplacement où il pourrait gêner le fonction-
nement  normal    du  navire  ou  provoquer des  blessures  cor-
porelles.
MAINTENIR  l'émetteur-récepteur  et  le  microphone  à  au 
moins 1 mètre du compas de route magnétique du navire.
NE PAS  utiliser  ou  placer  l’émetteur-récepteur  dans  des  
zones  où  la  temperature  est  inférieure  à  –20° (–4°F) ou  
supérieure  à  +60° (+140°F) ou  dans  des  zones  soumises  
au  rayonnement  solaire  direct,  telles  le  tableau  de  bord.
NE PAS nettoyer l'appareil avec des solvants agressifs tels 
que benzène ou alcool, susceptibles d'endommager les sur-
faces exposées du boîtier. En cas de dépôt de poussière ou 
de salissures sur l'émetteur-récepteur, il faut l'essuyer avec 
chiffon doux et sec.
NE  PAS  démonter  ou  modifier  l'émetteur-récepteur  pour 
quelque raison que ce soit.
ATTENTION! La  face  arrière  de  l’émetteur-récepteur 
chauffe en cas d’utilisation continue sur une longue durée.
Placer l’émetteur-récepteur hors de portée des enfants pour 
éviter toute utilisation inopinée.
ATTENTION!  Le  récepteur  est  conforme  à  la  norme 
d'étanchéité  IPX7*.  Cependant,  cette  etancheite  n’est  plus 
garantie apres une chute de l’appareil en raison des fissures 
du boitier ou des dommages au joint d’etancheite et autres 
dommages eventuels consecutifs a un tel incident.
*  À l'exception du connecteur d'alimentation CC, des fils d'entrée ou 
de sortie NMEA et des fils de sortie de fréquences audio.
U.S.A. uniquement
ATTENTION: Tout changement ou modification, non expres-
sément  approuvé  par  Icom  Inc., peut  annuler l'autorisation 
de l'utilisateur à utiliser cet appareil conformément à la régle-
mentation FCC.

viii
COUNTRY CODE LIST
•ISO3166-1
Country Codes Country Codes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Austria
Belgium
Bulgaria
Croatia
Czech Republic
Cyprus
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Iceland
Ireland
Italy
Latvia
AT
BE
BG
HR
CZ
CY
DK
EE
FI
FR
DE
GR
HU
IS
IE
IT
LV
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Liechtenstein
Lithuania
Luxembourg
Malta
Netherlands
Norway
Poland
Portugal
Romania
Slovakia
Slovenia
Spain
Sweden
Switzerland
Turkey
United Kingdom
LI
LT
LU
MT
NL
NO
PL
PT
RO
SK
SI
ES
SE
CH
TR
GB
TABLE OF CONTENTS
FOREWORD .........................................................................i
IMPORTANT ..........................................................................i
EXPLICIT DEFINITIONS ....................................................... i
IN CASE OF EMERGENCY ................................................. ii
INSTALLATION NOTE .......................................................... ii
PRECAUTIONS ................................................................... iii
COUNTRY CODE LIST ....................................................... iv
TABLE OF CONTENTS ....................................................... iv
1  OPERATING RULES .......................................................1
2  PANEL DESCRIPTION ................................................2–6
Front panel ■ ...................................................................2
Function display ■ ...........................................................4
Microphone ■ ..................................................................6
Softkey function ■ ............................................................6
3  PREPARATION............................................................7–8
MMSI code programming ■ .............................................7
  ■ATIS code programming (For Dutch and German version 
transceivers) ............................................................................8
4  BASIC OPERATION ..................................................9–15
Channel selection ■ ........................................................9
Receiving and transmitting ■ .........................................11
Call channel programming ■ .........................................12
Channel name programming ■......................................12

ix
TABLE OF CONTENTS (Continued)
Microphone Lock function ■ ..........................................13
Adjusting the volume level ■ ..........................................14
Adjusting the squelch level ■ .........................................14
 Adjusting the Backlight level ■.......................................15
 AquaQuake water draining function ■ ...........................15
5  SCAN OPERATION .................................................16–17
Scan types ■ .................................................................16
Setting Favorite channels ■ ...........................................17
Starting a scan ■ ...........................................................17
6  DUALWATCH/TRI-WATCH ............................................18
Description ■ .................................................................18
Operation ■ ...................................................................18
7  DSC OPERATION ...................................................19–65
DSC address ID  ■ ........................................................19
Position and time programming ■..................................22
Distress call ■ ................................................................23
Transmitting DSC calls ■ ...............................................27
Receiving DSC calls ■ ..................................................45
Transmitt ■ed Call log....................................................57
Receiv ■ed Call log .......................................................58
DSC Settings ■ .............................................................60
Making an Individual call using an AIS transponder ■ ..64
8  MENU SCREEN OPERATION ................................66–71
Menu screen operation ■ ..............................................66
Menu screen items ■ .....................................................67
Radio Settings items ■ ..................................................68
Configuration items ■ ....................................................69
9  CONNECTIONS AND MAINTENANCE ..................72–76
Connections ■ ...............................................................72
Antenna ■ ......................................................................74
Fuse replacement ■ ......................................................74
Cleaning ■ .....................................................................74
Supplied accessories ■ .................................................74
Mounting the transceiver ■ ............................................75
MB-132 installation ■ ....................................................76
10 SPECIFICATIONS AND OPTIONS .........................77–78
Specifications ■ .............................................................77
Options ■ .......................................................................78
11 CHANNEL LIST .......................................................79–80
12 TEMPLATE ..............................................................81–82
13 TROUBLE SHOOTING ..................................................83

1
1
OPERATING RULES
Priorities D
     
and  keep  an  up-to-date  copy  handy.  Safety  and  distress 
calls take priority over all others.
on another channel.
Privacy D
-
fully be used in any way.
Radio licenses D
(1) SHIP STATION LICENSE
You may require a current radio station license before using 
the transceiver. It is unlawful to operate a ship station which is 
not licensed, but required to be.
If  required,  contact  your  dealer  or  the  appropriate  govern-
ment agency for a Ship-Radiotelephone license application. 
This government-issued license states the call sign which is 
your craft’s identification for radio purposes.
(2) OPERATOR’S LICENSE
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.
If  required,  the  Restricted  Radiotelephone  Operator Permit 
must be posted or kept with the operator. If required, only a 
licensed radio operator may operate a transceiver.
However, non-licensed individuals may talk over a transceiver 
if a  licensed  operator  starts, supervises, ends  the  call and 
makes the necessary log entries.
A current copy of the applicable government rules and regu-
lations is  only required  to  be  on  hand for vessels in  which 
a  radio telephone  is  compulsory.  However, even  if  you  are 
not required to have these on hand it is your responsibility to 
be thoroughly acquainted with all pertinent rules and regula-
tions.
1
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3
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5
6
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16

2
PANEL DESCRIPTION
2
Front panel ■
t
u
y
we
r
io
qFunction display (p. 4)Speaker
q DISTRESS KEY [DISTRESS] (pp. 23, 24)
  Hold down for 3 seconds to transmit a Distress call.
w  ENTER KEY [ENT] (pp. 7, 10, 66)
  Push to set the input data, selected item, and so on.
e LEFT AND RIGHT KEYS [Ω]/[≈]
 Push to switch to the previous or next key function that  ➥
is assigned to the softkeys. (p. 6)
 Push to select the desired character or number in the  ➥
table while in the channel name, position, MMSI code  
programming mode, and so on. (pp. 7, 12, 22)
r  
UP AND DOWN/CHANNEL SELECT KEYS [∫•CH]/[√•CH]
 Push  to  select  the  operating  channels,  Menu  items,  ➥
Menu settings, and so on. (pp. 11, 66)
 Push to check Favorite channels, change the scanning  ➥
direction or manually resume a scan. (p. 17)
t CLEAR KEY [CLEAR]
 (pp. 7, 12, 
66
)
   Push to cancel the entered data, or to return to the previ-
ous screen.
y MENU KEY [MENU]
 (p. 
66
)
  Push to enter or exit the Menu screen.
u  VOLUME AND SQUELCH SWITCH/POWER SWITCH  
[VOL/SQL•PWR]
 When the power is OFF, hold down for 1 second to turn  ➥
ON power. (p. 11)
Hold down for 1 second to turn OFF power. ➥
 When the power is ON, push to enter the volume level  ➥
adjustment mode.* (p. 14)
  -
ume  level  adjustment,  squelch  threshold  level  adjustment, 
operating channel selection and the LCD and key backlight 
brightness adjustment, if assigned.
Rotate to adjust the volume level.* (p. 14) ➥
  *The desired function can be assigned in the Menu screen.

3
2
PANEL DESCRIPTION
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12
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15
16
i CHANNEL 16/CALL CHANNEL KEY [16/C]
Push to select Channel 16. (p. 9) ➥
Hold down for 1 second to select the Call channel. (p. 9) ➥
  
 Hold down for 3 seconds to enter Call channel program- ➥
ming mode when the Call channel is selected. (p. 12)
o SOFTKEYS
   The desired functions as described below can be assigned 
in the Menu screen.
  Scan [ ] (p. 17)
  Push to start or stop a Normal or Priority scan.
  Dualwatch/Tri-watch [ ] (p. 18)
Push to start a Dualwatch or Tri-watch. ➥
 Push to stop a Dualwatch or Tri-watch when either is  ➥
activated.
  High/Low [ ] (p. 11)
  Push to set the power to high or low.
 
  Channel [ ] (p. 9)
  Push to select a regular channel.
   Channel/Weather channel [ ]* (pp. 9, 11)
   Push  to  selects  and  toggles  the  regular  channel  and 
Weather channel.
  *Only U.S.A. and Australian version transceivers.
  AquaQuake [ ] (p. 15)
   While holding down, the AquaQuake function is activated 
to clear water away from the speaker grill.
  Favorite channel [ ] (p. 17)
 Push to set or clear the displayed channel as a Favorite  ➥
(Tag) channel.
 Hold  down  for  3  seconds  to  clear  or  set  all  Favorite  ➥
channels in the selected channel group.
  Name [ ] (p. 12)
  Push to enter the channel name programming mode.
  Backlight [ ] (p. 15)
   Push to enter the LCD and key backlight brightness ad-
justment mode.
 ∫]/[√]/[Ω]/[≈] or rotate Dial 
to adjust the brightness of the LCD and key backlight.
  LO/DX [ ]* (p. 11)
  Push to turn the Attenuator function ON or OFF.
 
  *Only U.S.A. and Australian version transceivers.
  Log [ ] (p. 58)
Push to enter “RCVD CALL LOG” in the DSC CALLS menu.

4
2PANEL DESCRIPTION
Function display ■
!4
!6
!5
qw ietr
!0
you
!1
!2
!3
q BUSY/TRANSMIT ICON (p. 11)
 “ ➥” appears when receiving a signal or when the 
squelch is open.
“ ➥” appears while transmitting.
w POWER ICON (p. 11)
“25W” appears when high power is selected. ➥
“1W” appears when low power is selected. ➥
e CHANNEL GROUP ICON (p. 10)
   Shows which channel group is selected, an International 
“INT,” U.S.A. “USA,”  ATIS “ATIS” or DSC “DSC”, depending 
on the version.
“WX” appears when the weather channel is selected.* ➥
    *Only U.S.A. and Australian version transceivers.
r CALL CHANNEL ICON (p. 9)
  Appears when the Call channel is selected.
t DUPLEX ICON (p. 10)
  Appears when a duplex channel is selected.
y FAVORITE CHANNEL ICON (p. 17)
  Appears when a Favorite (Tag) channel is selected.
u MESSAGE ICON (p. 58)
  Blinks when there is an unread DSC message.
i GPS ICON
 Stays ON  when  the  connected  GPS  receiver  is  acti- ➥
vated and valid position data is received.
Blinks when searching valid position data. ➥
o SWITCH ICON (p. 61)
   Appears when the “CH 16 SWITCH” in DSC Settings is set 
to ‘OFF.’
!0 LOW BATTERY ICON
   Blinks  when  the  battery  voltage  drops  to  approximately 
10 V DC or less.
!1 CHANNEL NUMBER READOUT
  Shows the selected operating channel number.
 
!2 CHANNEL NAME FIELD
  The channel name appears, if programmed. (p. 12)

5
2
PANEL DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
!3 KEY ICON (p. 6)
   Shows  the  programmed  function  of  the  softkeys  on  the 
front panel.
!4 TIME ZONE INDICATOR
 Shows the current time when a GPS data is received,  ➥
GPS receiver is connected, or the time is manually pro-
grammed.
  
seconds instead of current time. After 23.5 hours has passed, 
“NO TIME” will appear.
        
after 4 hours have passed from the time when the time was 
manually  programmed. The  manually  programmed  time  is 
held for only 23.5 hours, and after that, “NO TIME” will ap-
pear.
“LOCAL” appears when the offset time is set. ➥
“MNL” appears when the time is manually programmed. ➥
 “UTC”  appears  when  the  GGA,  GLL  and  GNS  GPS  ➥
sentence format is included in the GPS signal.
 The  date  information  appears  when  the  RMC  GPS  ➥
sentence format is included in the GPS signal.
 “NO TIME” appears when no GPS receiver is connect- ➥
ed, and no time is manually input.
 NOTEfortheIC-M323andIC-M324:
   These  models  do  not  come  with  the  internal  GPS. 
Therefore the GPS receiver needs to be connected, or 
the time manually needs to be programmed for the time 
zone indicator to be displayed.
!5 POSITION INDICATOR
 Shows  the  current  position  when  a  GPS  receiver  is  ➥
connected, or the position is manually programmed.
  -
onds  instead  of  position. The  last  position  is  held  for only 
23.5 hours, and after that, “NO POSITION” will appear.
            
hours have passed from the time when the position is manu-
ally programmed. The manually programmed position is held 
for only 23.5 hours, and after that, “NO POSITION” will ap-
pear.
 “NO  POSITION”  appears  when  no  GPS  receiver  is  ➥
connected, and no position is manually input.
!6 SCAN INDICATOR
 “SCAN 16” appears during a Priority scan; “SCAN” ap- ➥
pears during a Normal scan. (p. 17)
 “DUAL 16” appears during Dualwatch; “TRI 16” appears  ➥
during Tri-watch. (p. 18)
!8 LOCAL ICON (p. 11)
  Appears when the Attenuator function is turned ON.
  *Only U.S.A. and Australian version transceivers.

6
2PANEL DESCRIPTION
Microphone ■
Microphone
w
q
e
q PTT SWITCH [PTT]
  Hold down to transmit, release to receive. (p. 11)
w CHANNEL UP/DOWN KEYS [Y]/[Z]
Push either key to check Favorite channels. (p. 11) ➥
 Push either key to change scanning direction or manu- ➥
ally resumes a scan. (p. 17)
e TRANSMIT POWER KEY [HI/LO]
Push to toggle the power high or low. (p. 11) ➥
  
 While holding down [HI/LO], turn ON the power to turn  ➥
the Microphone Lock function ON or OFF. (p. 13)
Softkey function ■
Various functions can be assigned to the softkeys.
When the key function is assigned, the key icon is displayed 
above the softkey, as shown below. 
Softkey function selection D
 When “ ➥Ω” or “≈” is displayed beside the key icon, push-
ing [Ω] or [≈] sequentially shows the previous or next key 
function that is assigned to the softkey.
Push Push
*Push this key to start or stop scan.
*
The order of the key icons  may differ, depending on the 
preprogramming.

7
3
PREPARATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
MMSI code programming ■
The 9 digit MMSI (Maritime Mobile Service Identity: DSC self 
ID) code can be programmed at power ON.
This initial code setting can be performed only once.
After being set, it can be changed by only your dealer 
or distributor. If your MMSI code has already been pro-
grammed, this programming is not necessary.
Hold down [PWR](Dial) to turn ON the power. q
 
Push [ENT] to start the MMSI code programming. w
 
normal  operating  screen.  In  this  case,  the  transceiver  cannot 
make  a  DSC  call. To  program  the  MMSI  code,  turn  OFF  the 
power, then turn it ON again.
Enter your MMSI code in the following manner: e
 ∫]/[√]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
Repeat step  r e to enter all 9 digits.
 After entering the 9 digit code, “FINISH” is automatically  t
selected, and then push [ENT] or Dial to set it.
The “MMSI CONFIRMATION” screen is displayed. y
Enter your MMSI code again for confirmation. u
 e through t.
 When your MMSI code programming is successfully com- i
pleted, the screen as shown below is briefly displayed.
 
The programmed MMSI code can be checked in the MENU 
screen. (p. 67)
NOTE:  Depending  on  the  transceiver  version,  the  ATIS 
code programming may be required after programming the 
MMSI code. See the next page for details.

8
3PREPARATION
The 10 digit ATIS (Automatic Transmitter Identification Sys-
tem) code can be programmed at power ON.
This initial code setting can be performed only once.
After being set, it can be changed by only your dealer 
or distributor. If your ATIS code has already been pro-
grammed, this programming is not necessary.
 After programming the MMSI code, “Push [ENT] to Regis- q
ter Your ATIS” is displayed.
Push [ENT] to start the ATIS code programming. w
 
normal  operating mode. In  this case, the ATIS  function is  dis-
abled. To program the ATIS code, turn OFF the power, then turn 
it ON again.
Enter your ATIS code in the following manner: e
 ∫]/[√]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
Repeat step  r e to enter all 10 digits.
 After entering the 10 digit code, “FINISH” is automatically  t
selected, and then push [ENT] or Dial to set it.
The “ATIS CONFIRMATION” screen is displayed. y
Enter your ATIS code again for confirmation. u
 e through t.
 When your ATIS code programming is successfully com- i
pleted, the screen as shown below is briefly displayed.
 
The programmed ATIS code can be checked in the MENU 
screen. (p. 67)
ATIS code programming ■ (For Dutch and German version transceivers)

9
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Channel selection ■
Channel 16 D
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  Du-
alwatch and Tri-watch. While standing by, you must monitor 
Channel 16.
Push [16/C] to select Channel 16. ➥
 Push [CHAN] to return to the screen displayed before you  ➥
selected Channel 16, or push [Y](CH)/[Z](CH) to select 
an operating channel.
  * [CH/WX] appears only for U.S.A version transceiver.
Call channel D
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,  and  are  used  to  store 
your  most  often  used  channel  in  each  channel  group,  for 
quick recall. (p. 12)
 Hold down [16/C] for 1 second to select the Call channel of  ➥
the selected channel group.
 
 -
gramming. (p. 12)
 Push [CHAN] to return to the screen displayed before you  ➥
selected Call channel, or push [Y](CH)/[Z](CH) to select 
an operating channel.
  * [CH/WX] appears only for U.S.A version transceiver.

10
4BASIC OPERATION
Channel group selection D
There are preprogrammed international channels for the IC-
M323/IC-M323G/IC-M324/IC-M324G. Except for the Europe 
versions,  you  can  select  a  channel  group  suitable for your 
operating area, as described below.
Push [MENU]. q
 Rotate Dial or push [ w∫]/[√] to select “Radio Settings,” and 
then push [ENT].
 Rotate Dial or push [ e∫]/[√] to select “CHAN Group,” and 
then push [ENT].
 Rotate Dial or push [ r∫]/[√] to select the desired channel 
group, and then push [ENT].
 
channel groups may be selected, depending on the version.
Push [EXIT] to exit the Menu screen. t
Push [ yY](CH)/[Z](CH) to select a channel.
 Y]/[Z] on the microphone selects only Favorite chan-
nels.
 
 
When the U.S.A. channel 
group is selected.
Channel group icon appears

11
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
Weather channels D
  (U.S.A. and Australian version transceiver only)
The transceiver has 10 weather channels. These are used for 
monitoring broadcasts from NOAA (National Oceanographic 
and Atmospheric Administration.)
The transceiver can automatically detect a weather alert tone 
on the selected weather channel or while scanning. (p. 17)
 Push [CH/WX] once or twice to select a weather channel. q
 
  ” appears when the Weather Alert function is in turned 
ON. (p. 78)
Push [ w∫](CH) or [√](CH) to select a channel.
 Y]/[Z] on the microphone selects only Favorite chan-
nels.
When weather alert is OFF.
When weather alert is ON.
 Adjusting the volume/squelch  ■
level
The  volume and  squelch  level  can  be  adjusted  with  [VOL/
SQL](Dial).
 Push  [VOL/SQL](Dial)  one  or  more  times  to  display the  q
volume/squelch adjustment screen.
 Rotate [VOL/SQL](Dial)  wor push [∫]/[√]/[Ω]/[≈] to  adjust 
the volume/squelch level.
 
         
open; 10 is tight squelch; 1 is loose squelch.
 -
ceiver sets the selected volume level, and returns to the normal 
mode.
 Push [ENT] to set the  level,  and exit the volume adjust- e
ment mode.
 
The desired function can be assigned to Dial. See page 70 
for details.

12
4BASIC OPERATION
Receiving and transmitting ■
CAUTION: Transmitting without an  antenna  will damage 
the transceiver.
Hold down [PWR](Dial) to turn ON the power. q
Set the audio and squelch levels. (p. 14) w
 First, open the squelch. Then, adjust the audio output  ➥
level. After that, adjust the squelch level until the noise 
just disappears.
Change the channel group. (p. 10) e
Push [ r∫](CH)/[√](CH) to select a channel. (pp. 9, 10)
 Y]/[Z] on the microphone also selects a channel.
  ” appears and audio is heard.
 
 Push [LO/DX] to turn the receive Attenuator function ON  t
or OFF, if necessary.
 
 
Push [HI/LO] to select the output power, if necessary. y
 
when low power is selected.
 
power for longer distance communications.
 
 Hold down [PTT] to transmit, then speak at your normal  u
voice level.
  ” appears.
 
Release [PTT] to receive. i
Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CANNOT 
be lawfully used by the general public in U.S.A. waters.
IMPORTANT: To maximize the readability of your transmit-
ted signal, pause a few seconds after pushing [PTT], hold 
the microphone 5 to 10 cm (2 to 4 inches) from your mouth 
and speak at a normal voice level.
NOTE for the TOT (Time-out Timer) function ✓
The TOT function inhibits continuous transmission beyond a 
preset time period after the transmission starts.
10 seconds before transmission is cutoff, a beep sounds  to 
indicate  the  transmission  will  be  shut  down  and “TOT”  ap-
pears in the channel name field. Transmission is not possible 
for 10 seconds after this shut down.
Microphone
t y qw
iu
ry
r

13
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Call channel programming ■
You can program the Call channel with your most often-used 
channel in each channel group for quick recall.
 Select the desired channel group (INT, USA, ATIS or DSC)  q
to be programmed. (p. 10)
 Hold down [16/C] for 1 second to select the Call channel of  w
the selected channel group.
 
 Hold down [16/C] again for 3 seconds (until a long beep  e
changes to 2 short beeps) to enter the Call channel pro-
gramming mode.
Rotate Dial or push [ r∫](CH)/[√](CH) to select a channel.
 Push [ENT] to program the displayed channel as the Call  t
channel.
 
Channel name programming ■
Each channel can be assigned a unique alphanumeric ID of 
up to 10 characters.
Capital letters, 0 to 9, some symbols (! " # $ % & ' ( ) * + , – . 
Push [ q∫](CH)/[√](CH) to select a channel.
 -
vated.
 Push  [NAME]  to  open  the  channel  name  programming  w
screen.
 
Enter the desired channel name in the following manner: e
 ∫]/[√]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
 
 
 

14
4BASIC OPERATION
Repeat step  r e to input all characters.
 Push [ tΩ]/[≈]/[∫]/[√] to select “FINISH,” then push [ENT] to 
set the name and return to the previous screen.
Microphone Lock function ■
The Microphone Lock function electrically locks [∫], [√] and 
the [HI/LO] keys on the supplied microphone. This prevents 
accidental channel changes and function access.
 While holding down [HI/LO] on the microphone, hold down  ➥
[PWR](Dial) to turn ON the transceiver and turn the Micro-
phone Lock function ON or OFF.
[HI/LO]
[Y]/[Z]

15
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 Adjusting the Backlight level ■
The function display and keys can be backlit for better visibil-
ity under low light conditions.
The backlight is adjustable in 7 levels and OFF.
Depending on the preprogramming, the adjustment method 
differs, as described below.
 Push [BKLT] to show the backlight adjustment screen. Ro- ➥
tate Dial or push [∫]/[√]/[Ω]/[≈] to adjust the brightness of 
the LCD and key backlight, and then, push [ENT].
 
 If no key operation is performed for about 5 seconds, the transceiver 
sets the selected backlight level, and returns to the normal mode.
When  the  Backlight  function  is  assigned  to  the  [VOL/
SQL](Dial):
 Push  [VOL/SQL](Dial)  one  or  more  times  to  display the  q
backlight adjustment screen.
 Rotate  [VOL/SQL](Dial)  to  adjust  the  brightness  of  the  w
LCD and key backlight, and then, push [ENT].
The desired function can be assigned to Dial. See page 70 
for details.
 AquaQuake water draining  ■
function
The AquaQuake water draining  function  clears  water  away 
from the speaker grill. Without this function, water may muffle 
the sound coming from the speaker. A buzzing sound is heard 
when this function is activated.
 While  holding  down [AQUA],  the  AquaQuake  function  is  ➥
activated to clear water away from the speaker grill.
 -
ter, regardless of the volume level setting.
        
the AquaQuake function is activated.
When the AquaQuake function is activated.

16
SCAN OPERATION
5
Scan types ■
Scanning is an efficient way to locate signals quickly over a 
wide  frequency  range. The  transceiver  has  a  Priority  scan 
and a Normal scan.
When the Weather Alert function is turned ON, the weather 
channel is also checked while scanning*. (p. 78)
*Only for U.S.A version transceiver.
Set  the  Favorite  channels  (scanned  channel)  before  scan-
ning. Clear the Favorite channels which inconveniently stop 
scanning, such as those for digital communication use. (Refer 
to the next page for details.)
Choose Priority or Normal scan in the Menu screen. (p. 
77
)
PRIORITY SCAN
The Priority scan sequentially searches through all Favor-
ite channels while monitoring Channel 16. When a signal is 
detected on Channel 16, the scan pauses until the signal 
disappears. When a signal is detected on a channel other 
than Channel 16, the scan becomes a Dualwatch until the 
signal disappears.
NORMAL SCAN
The  Normal  scan,  like  the  Priority  scan,  sequentially 
searches  through  all  Favorite  channels.  However,  unlike 
the Priority scan, Channel 16 is not checked unless it is set 
as a Favorite channel.
WX*
CH 01
CH 16
CH 02
CH 05 CH 04
CH 03
*When the weather alert function is activated.
 (Only for U.S.A version transceiver.)
CH 01 CH 02
WX*
CH 05 CH 04
CH 03
*When the weather alert function is activated.
 (Only for U.S.A version transceiver.)

17
5
SCAN OPERATION
Setting Favorite channels ■
For more efficient scanning, add desired channels as Favor-
ite channels, or clear the Favorite on unwanted channels. 
Channels that are not tagged will be skipped while scanning. 
Favorite  channels  can  be  independently  assigned  to  each 
channel group (INT, USA, ATIS or DSC).
Select the desired channel group. (p. 10) q
Select the desired channel to be set as a Favorite channel. w
Push [ e] to set the displayed channel as a Favorite channel.
 ” appears on the display.
To cancel the Favorite channel setting, repeat step  r e.
 ” disappears.
Clearing (or setting) all Favorite channels ✓
Hold down [] for 3 seconds (until a long beep changes to 
2  short  beeps)  to  clear  all  Favorite  channel settings  in  the 
selected channel group.
Starting a scan ■
First, set  the scan type (Priority or Normal scan) and scan 
resume timer in the Menu screen. (p. 68)
Select the desired channel group. (p. 10) q
Set the Favorite channels, as described to the left. w
Make sure the squelch is closed to start a scan. e
Push [SCAN] to start a Priority or Normal scan. r
 -
ing a Normal scan.
 -
appears, or resumes after pausing 5 seconds, depending on the 
setting. (Channel 16 is still monitored during a Priority scan.)
 Y]/[Z] on either transceiver or microphone, to check the 
scanning Favorite channels,  change  the  scanning  direction  or 
manually resume the scan.
 
Channel 16 during a Priority scan.
To stop the scan, push [CLEAR] or repeat step  t r.
Scan starts. When a signal is received.
Push
[SCAN]
[Example]: Starting a Normal scan.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

18
DUALWATCH/TRI-WATCH
6
Description ■
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 and 
Tri-watch are convenient for monitoring Channel 16 when you 
are operating on another channel.
Operation ■
Select Dualwatch or Tri-watch in the Menu screen. (p. 68) q
 Push [ wY](CH) or [Z](CH) to select the desired operating 
channel.
Push [DW] to start a Dualwatch or Tri-watch scan. e
 
Tri-watch.
 
To cancel Dualwatch or Tri-watch, push [DW] again. r
DUALWATCH/TRI-WATCH SIMULATION
Dualwatch Tri-watch
Call channel
Ch 88
Ch 16 Ch 88 Ch 16 Ch 88 Ch 75
watch pause on Channel 16 until the signal disappears.
          
watch, Tri-watch becomes Dualwatch until the signal dis-
appears.
or Tri-watch, hold down [PTT].
[Example]: Operating Tri-watch on INT Channel 25.
Tri-watch starts. Signal is received on 
Call channel.
Tri-watch resumes after the 
signal disappears.
Signal received on Channel 
16 takes priority.

19
7
DSC OPERATION
DSC address ID  ■
Programming Individual ID D
A total of 100 DSC address IDs can be programmed and as-
signed a name of up to 10 characters.
Enter “INDIVIDUAL ID” in the DSC SETTINGS menu. q
Push [ADD]. w
 
Enter a desired individual ID in the following way: e
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
 
 The first digit is specified as ‘0,’ and the second digit is 
other than ‘0’for a Group ID.
The first two digits are ‘0’ for any Coast station ID.
Repeat step  r e to enter all 9 digits.
After entering the 9 digit code, push [ENT] or Dial to set it. t
 
Enter a desired 10 digit ID name in the following way: y
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
 After entering the ID name, select “FINISH” using Dial, or  u
[Y]/[Z]/[Ω]/[≈], then push [ENT] or Dial to program it.
 
Push [MENU] to exit the MENU screen. i
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
   MENU    ➪    DSC Settings    ➪   
Individual ID
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

20
7DSC OPERATION
Programming Group ID D
Enter “GROUP ID” in the DSC SETTINGS menu. q
Push [ADD]. w
 
Enter a desired group ID in the following way: e
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
 
  The first digit is specified as ‘0,’ and the second digit is 
other than ‘0’for a Group ID.
The first two digits are ‘0’ for any Coast station ID.
Repeat step  r e to input the specific 9 digits group code.
After entering the 9 digit code, push [ENT] or Dial to set it. t
 
Enter a desired 10 digit ID name in the following way: y
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
 After entering the ID name, select “FINISH” using Dial, or  u
[Y]/[Z]/[Ω]/[≈], then push [ENT] or Dial to program it.
 
Push [MENU] to exit the MENU screen. i
   MENU    ➪    DSC Settings   ➪   
Group ID
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

21
7
DSC OPERATION
Deleting Individual/Group ID D
 Enter “INDIVIDUAL ID” or “GROUP ID” in the DSC SET- q
TINGS menu.
 
case, push [MENU] to exit the MENU screen.
 Rotate Dial or push [ wY]/[Z] to select a desired ID name, 
then push [DEL].
 Push [OK] to delete the ID, and return to the “INDIVIDUAL  e
ID” or “GROUP ID” list screen.
 
Push [MENU] to exit the MENU screen. r
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 MENU   ➪   DSC Settings   ➪   
Individual ID
/
Group ID
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

22
7DSC OPERATION
A Distress call should include the ship’s position and time. If 
no GPS is connected, your position and UTC (Universal Time 
Coordinated) time should be manually input. They are auto-
matically included when a GPS receiver compatible with the 
NMEA 0183 (ver. 2.0 or later) format is connected.
connected.
only 23.5 hours.
Enter “POSITION INPUT” in the DSC SETTINGS menu. q
 Edit  your  latitude and  longitude  position using  Dial,  and  w
[Y]/[Z]/[Ω]/[≈].
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
on the ‘N’ or ‘S’ position.
 
is on the ‘W’ or ‘E’ position.
After entering the position, push [ENT] to program it. e
 The UTC time programming screen is displayed, enter the  r
UTC time in the following way:
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
Push [ENT] or Dial to program your position and time. t
 
Position and time programming ■
   MENU    ➪    DSC Settings    ➪    Position Input
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

23
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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 im-
mediate assistance.
NEVER MAKE A DISTRESS CALL IF YOUR SHIP OR A 
PERSON  IS  NOT  IN  AN  EMERGENCY.  A  DISTRESS 
CALL  SHOULD  BE  MADE  ONLY  WHEN  IMMEDIATE 
HELP IS NEEDED.
Simple call D
 While lifting up the key cover, hold down [DISTRESS] for 3  q
seconds to transmit the Distress call.
 
both the key and display backlighting blink.
         
Distress call is transmitted.
 After transmitting the call, the transceiver waits for an ac- w
knowledgment call.
          
minutes,  until  an  acknowledgement  is  received  (‘Call  repeat’ 
mode), or DSC Cancel call is made (p. 26).
 
  Ω]/[≈] then  push  [INFO]  to  display the transmitted Dis-
tress call information.
 Ω]/[≈] then push [PAUSE] to pause the ‘Call repeat’ mode, 
push [RESUME] to resume it.
 After receiving the acknowledgment, push [ALARM OFF]  e
then reply using the microphone.
A distress alert default contains: ➥
  
       
is held for 23.5 hours, or until the power is 
turned OFF.

24
7DSC OPERATION
Regular call D
The nature of the Distress call should be included in the Dis-
tress call.
Enter “DISTRESS CALL” in the DSC CALLS menu. q
 Select the nature of the distress using Dial or [ wY]/[Z], then 
push Dial or [ENT].
 
‘Capsizing,’ ‘Sinking,’ ‘Adrift,’ ‘Abandoning  ship,’ ‘Piracy’  or ‘Man 
Overboard’ is selectable.
 -
tion is made.
 
 
The Distress call confirmation screen is displayed. e
 Y]/[Z] to see the hidden lines.
 Hold down [DISTRESS] for 3 seconds to transmit the Dis- r
tress call.
 
both the key and display backlighting blink.
 
   MENU    ➪    DSC Calls    ➪    Distress Call
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

25
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 After transmitting the call, the transceiver waits for an ac- t
knowledgment call.
          
minutes,  until  an  acknowledgement  is  received  (‘Call  repeat’ 
mode), or DSC cancel call is made (p. 26).
 
  Ω]/[≈] then  push  [INFO]  to  display the transmitted Dis-
tress call information.
 Ω]/[≈] then push [PAUSE] to pause the ‘Call repeat’ mode, 
push [RESUME] to resume it.
 After  receiving  an  acknowledgment  call,  push  [ALARM  y
OFF] then reply using the microphone.
A distress alert contains: ➥
  w.
       
is held for 23.5 hours, or until the power is 
turned OFF.
When  no  GPS  receiver  is  connected,  and  both  position 
and time have been manually programmed, the screen as 
shown below appears. Edit your latitude and longitude po-
sition and UTC time as follows:
 Push [CHG], then edit your latitude and longitude posi- ➥
tion and UTC time. 
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
is on the ‘N’ or ‘S’ position.
 -
sor is on the ‘W’ or ‘E’ position.

26
7DSC OPERATION
Distress cancel call D
 While  waiting  for  an  acknowledgment  call,  push  [CAN- q
CEL].
Push [CONTINUE]. w
 
Push [FINISH]. e
 
The Distress cancel call is transmitted. r
Channel 16 is automatically selected. t
 
   
mode.

27
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting DSC calls ■
To  ensure  correct  operation  of  the  DSC  function,  make 
sure you correctly set the CH70 SQL LEVEL. (p. 63)
Transmitting an individual call D
The Individual call function allows you to transmit a DSC sig-
nal to only a specific station.
Enter “INDIVIDUAL CALL” in the DSC CALLS menu. q
 Select the desired preprogrammed individual address, or  w
“Manual  Input,”  using  Dial  or  [Y]/[Z],  then  push  Dial  or 
[ENT].
 
 
code for the individual you wish to call. 
 
 
About Manual Inputting:
Enter a desired individual ID in the following way:
Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
is entered, an error beep sounds when pushing [ENT] or dial.
NOTE: When a coast station is selected in this step, the 
voice channel is automatically specified by the coast sta-
tion. Therefore, skip step e and go directly to step r.
 Select a desired intership channel using Dial or [ eY](CH)/
[Z](CH), then push [ENT].
 
recommended order.
 + Continued on the next page.
   MENU    ➪    DSC Calls    ➪    Individual Call
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

28
7DSC OPERATION
Transmitting an Individual call (continued) D
A confirmation screen appears. r
 
Push [CALL] to transmit the Individual call. t
 
becomes clear.
 Standby on Channel 70 until an acknowledgement is re- y
ceived.
 When the acknowledgement ‘Able to comply’ is received,  u
beeps sound and the screen below is displayed.
   Push [ALARM OFF] to stop the beeps and then select the 
intership channel specified in step e. 
       
called cannot use the channel.
 i.
   Or, when the acknowledgement ‘Unable to comply’ is re-
ceived, beeps sound and the screen below is displayed.

29
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
   Push [ALARM OFF] to stop the beeps. Then push [EXIT] 
to return to the operating channel (before you entered the 
MENU screen).
 After communicating, push [EXIT] to return to the normal  i
operating mode.
Convenient! ✓
When the optional MA-500TR C L A S S  B A I S  T R A N S P O N D E R  is 
connected  to  your  transceiver,  you  can  transmit  individual 
DSC calls to selected AIS targets on the transponder without 
needing to enter the target’s MMSI code.
See pages 64 and 65 for more details.

30
7DSC OPERATION
Transmitting an Individual Acknowledgement D
When receiving  an  Individual  call,  you can  transmit an  ac-
knowledgement (‘Able to Comply,’ ‘Propose New Channel’ or 
‘Unable to Comply’) by using the on-screen prompts (Quick 
ACK.) Also, you can send an acknowledgement through the 
MENU system (Man ual ACK.)
Quick ACK:
 When an Individual call is received, beeps sound and the  q
screen below is displayed.
  Push [ALARM OFF] to stop the beeps.
Push [ACK]. w
Select one of three options, then push [ENT]. e
 
 
  
any changes.
  
         The Acknowledgement call (‘Unable to 
Comply’)  can  be  automatically  trans-
mitted, if set. See page 60 for details.
      
call, but you specify the intership chan-
nel. Select a desired intership channel, 
using  Dial,  or  [Y](CH)/[Z](CH),  then 
push [ENT].

31
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
The Individual ACK confirmation screen is displayed. r
  Push [CALL] to transmit an acknowledgement call.
The screens shown below are displayed. t
Reply to the call using the microphone. y
Push [EXIT] to return to the normal operating mode. u
Manual ACK:
Enter “INDIVIDUAL ACK” in the DSC CALLS menu. q
 
will not be displayed.
 Select a desired individual address or ID code to reply to,  w
using Dial or [Y]/[Z], then push [ENT].
 
 
 Perform steps  e e to u, as described in “Quick ACK:,” be-
ginning on the previous page.
   MENU    ➪    DSC Calls    ➪    Individual ACK
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

32
7DSC OPERATION
Transmitting a Group call D
The Group call function allows you to transmit a DSC signal 
to only a specific group.
Enter “GROUP CALL” in the DSC CALLS menu. q
 Select the desired preprogrammed group address or “Man- w
ual Input,” using Dial or [Y]/[Z], then push Dial or [ENT].
 
 
group you wish to call.
 
 
 Select a desired intership channel using Dial or [ eY](CH)/
[Z](CH), then push [ENT].
 
recommended order.
About Manual Inputting:
Enter a desired group ID in the following way:
Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
‘0’ for a Group ID.
   MENU    ➪    DSC Calls    ➪    Group Call
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

33
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A confirmation screen appears. r
 
Push [CALL] to transmit the Group call. t
 
becomes clear.
 After  the  Group  call  has  been  transmitted, the  following  y
screen is displayed.
Announce the information using the microphone. u
 After the announcement, push [EXIT] to return to the nor- i
mal operating mode.

34
7DSC OPERATION
Transmitting an All Ships call D
All ships, that have DSC transceiver, use Channel 70 as their 
‘listening channel.’ When you want to announce a message to 
these ships within range, use the ‘All Ships Call’ function.
Enter “ALL SHIPS CALL” in the DSC CALLS menu. q
 Select a desired category, using Dial or [ wY]/[Z], then push 
Dial or [ENT].
         -
grammed setting. Ask your dealer for the selectable categories.
 
 
 Select a desired traffic channel, using Dial or [ eY]/[Z], then 
push Dial or [ENT].
 
A confirmation screen appears. r
 
Push [CALL] to transmit the All Ships call. t
 
becomes clear.
 After the All Ships call has been transmitted, the following  y
screen is displayed.
Announce the message using the microphone. u
 After the announcement, push [EXIT] to return to the nor- i
mal operating mode.
   MENU    ➪    DSC Calls    ➪    All Ships Call
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

35
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Position Request Call D
  (U.S.A. and Australian version transceiver only)
Transmit a Position Request Call when you want to know a 
specific ship’s current position, etc.
Enter “POSITION REQUEST” in the DSC CALLS menu. q
   MENU    ➪    DSC Calls    ➪    Position Request
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
 Select the desired preprogrammed individual address, or  w
“Manual  Input,”  using  Dial  or  [Y]/[Z],  then  push  Dial  or 
[ENT].
 
 
code for the individual you wish to call.
About Manual Inputting:
Enter a desired individual ID in the following way:
Y]/[Z]/[Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
entered, an error beep sounds after pushing [FINISH].
A confirmation screen appears. e
 

36
7DSC OPERATION
Push [CALL] to transmit the Position Request Call. r
 
becomes clear.
 After the Position Request Call has been transmitted, the  t
following screen is displayed.
 When the acknowledgement call is received, beeps sound  y
and the following screen is displayed.
 Push [ALARM OFF] to stop the beeps, and then the screen  u
as shown below is displayed.
Push [EXIT] to return to the normal operating mode. i

37
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Position Report Call D
  (U.S.A. and Australian version transceiver only)
Transmit a Position Report Call when you want to announce 
your own position to a specific ship and receive an answer 
back.
Enter “POSITION REPORT” in the DSC CALLS menu. q
   MENU    ➪    DSC Calls    ➪    Position Report
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
 Select the desired preprogrammed individual address, or  w
“Manual  Input,”  using  Dial  or  [Y]/[Z],  then  push  Dial  or 
[ENT].
 
 
code for the individual you wish to call. 
About Manual Inputting:
Enter a desired individual ID in the following way:
Y]/[Z]/[Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
entered, an error beep sounds after pushing [FINISH].
A confirmation screen appears. e
 

38
7DSC OPERATION
Push [CALL] to transmit the Position Report Call. r
 
becomes clear.
 After the  Position Report  Call  has been transmitted, the  t
transceiver automatically returns to the normal operating 
mode.
When no GPS receiver is connected, and both position and 
time have  been  manually programmed, the screen shown 
below appears. Edit your latitude and longitude position and 
UTC time as follows:
 Push [CHG], then edit your latitude and longitude position  ➥
and UTC time. 
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
is on the ‘N’ or ‘S’ position.
 -
sor is on the ‘W’ or ‘E’ position.

39
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Polling Request Call D
  (U.S.A. and Australian version transceiver only)
Transmit  a Polling  Request  Call  when  you  want to  know a 
specific vessel is in the communication area, or not.
Enter “POLLING REQUEST” in the DSC CALLS menu. q
   MENU    ➪    DSC Calls    ➪    Polling Request
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
 Select the desired preprogrammed individual address, or  w
“Manual  Input,”  using  Dial  or  [Y]/[Z],  then  push  Dial  or 
[ENT].
 
 
code for the individual you wish to call. 
About Manual Inputting:
Enter a desired individual ID in the following way:
Y]/[Z]/[Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
entered, an error beep sounds after pushing [FINISH].
A confirmation screen appears. e
 

40
7DSC OPERATION
Push [CALL] to transmit the Polling Request Call. r
 
becomes clear.
 After the  Polling Request Call has been transmitted, the  t
following screen is displayed.
 When the acknowledgement call is received, beeps sound  y
and the following screen is displayed.
 Push [ALARM OFF] to stop the beeps, and then the screen  u
as shown below is displayed.
Push [EXIT] to return to the normal operating mode. i

41
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Test call D
Testing on the exclusive DSC distress and safety calling chan-
nels should be avoided as much as possible. When testing on 
a distress/safety channel is unavoidable, you should indicate 
that these are test transmissions. 
Normally the test call would require no further communica-
tions between the two stations involved.
Enter “TEST CALL” in the DSC CALLS menu. q
 Select  a  desired  preprogrammed  individual  address,  or  w
“Manual Input,” then push Dial or [ENT].
 
 
the individual you wish to call.
 
 
About Manual Inputting:
Enter a desired address ID in the following way:
Ω]/[≈].
←” or “→,” then push 
[ENT] or Dial.
is entered, an error beep sounds when pushing [ENT] or dial.
A confirmation screen appears. e
 
 + Continued on the next page.
   MENU    ➪    DSC Calls    ➪    Test Call
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

42
7DSC OPERATION
Transmitting a Test call (continued) D
Push [CALL] to transmit the Test call. r
 
becomes clear.
 After  the  Test  call  has  been  transmitted,  the  following  t
screen is displayed.
 When the acknowledgement call is received, beeps sound  y
and the following screen is displayed.
 Push [ALARM OFF] to stop the beeps, and then the screen  u
as shown below is displayed.
Push [EXIT] to return to the normal operating mode. i

43
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Test Acknowledgement call D
When  the “TEST  ACK”  in  DSC  settings  is  set  to ‘Auto TX’  
(p.  60),  the  transceiver  automatically  transmits  a  reply  call 
when receiving a Test call.
Quick ACK:
 When a Test call is received, beeps sound and the screen  q
shown below is displayed.
  Push [ALARM OFF] to stop the beeps.
Push [ACK]. w
 
 
About Received call information:
The Test ACK confirmation screen is displayed. e
  Push [CALL] to transmit the acknowledgement call.
 While transmitting the acknowledgement call, the screen  r
shown below is displayed, and then returns to the normal 
operating mode.

44
7DSC OPERATION
Transmitting a Test Acknowledgement call (continued) D
Manual ACK:
Enter “TEST ACK” in the DSC CALLS menu. q
 
displayed.
 
 
 Select a desired Test call to reply to, using Dial or [ wY]/[Z], 
then push Dial or [ENT].
The Test ACK confirmation screen is displayed. e
  Push [CALL] to transmit the acknowledgement call.
 While transmitting the acknowledgement call, the screen  r
shown below is displayed, and then returns to the normal 
operating mode.
   MENU    ➪    DSC Calls    ➪    Test ACK
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

45
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Position Reply call D
Transmit a Position Reply call when a Position Request call 
is received.
When the “POSITION ACK” in DSC Settings is set to ‘Auto 
TX’ (p. 60), the transceiver automatically transmits a reply call 
when receiving a Position Request call.
Quick Reply:
 When  a  Position  Request  call  is  received, beeps  sound  q
and the screen shown below is displayed.
  Push [ALARM OFF] to stop the beeps.
Push [ACK]. w
 
 
About Received call information:
The Position Reply confirmation screen is displayed. e
  Push [CALL] to transmit the reply call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.

46
7DSC OPERATION
Transmitting a Position Reply call (continued) D
Manual Reply:
Enter “POSITION REPLY” in the DSC CALLS menu. q
 -
ply” item will not be displayed.
 
 
 Select a  desired  Position Request  call  to reply to, using  w
Dial or [Y]/[Z], then push Dial or [ENT].
The Position Reply call confirmation screen is displayed. e
  Push [CALL] to transmit the acknowledgement call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.
   MENU    ➪    DSC Calls    ➪    Position Reply
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

47
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
When no GPS receiver is connected, and both position and 
time have been manually programmed, the screen shown 
below appears. Edit your latitude and longitude position and 
UTC time as follows:
 Push [CHG], then edit your latitude and longitude posi- ➥
tion and UTC time. 
 Y]/[Z]/[Ω]/[≈].
 
 ←” or “→,” then push 
[ENT] or Dial.
 
is on the ‘N’ or ‘S’ position.
 -
sor is on the ‘W’ or ‘E’ position.

48
7DSC OPERATION
Transmitting a Position Report Reply call D
Transmit a Position Report Reply call when a Position Report  
call is received.
Quick Reply:
 When a Position Report call is received, beeps sound and  q
the screen as shown below is displayed.
  Push [ALARM OFF] to stop the beeps.
Push [ACK]. w
 
 -
tion.
About Received call information:
 The  Position  Report  Reply  confirmation  screen  is  dis- e
played.
  Push [CALL] to transmit the reply call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.

49
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Transmitting a Position Report Reply call (continued) D
Manual Reply:
 Enter “REPORT REPLY” in the DSC CALLS menu. q
 -
tion Report Reply” item will not be displayed.
 
 
 Select a desired Position Report Request call to reply to,  w
using Dial or [Y]/[Z], then push Dial or [ENT].
 The Position Report Reply call confirmation screen is dis- e
played.
  Push [CALL] to transmit the acknowledgement call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.
   MENU    ➪    DSC Calls    ➪    Position Report Reply
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

50
7DSC OPERATION
Transmitting a Polling Request Reply call D
Transmit a Polling Request Reply call when a Polling Request 
call is received.
When the “POSITION ACK” in DSC Settings is set to ‘Auto 
TX’ (p. 60), the transceiver automatically transmits a reply call 
when receiving a Polling Request call.
Quick Reply:
 When a Polling Request call is received, beeps sound and  q
the screen as shown below is displayed.
  Push [ALARM OFF] to stop the beeps.
Push [ACK]. w
 
 
About Received call information:
 The  Polling  Request  Reply  confirmation  screen  is  dis- e
played.
  Push [CALL] to transmit the reply call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.

51
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Manual Reply:
Enter “POLLING REPLY” in the DSC CALLS menu. q
 
item will not be displayed.
 
 
 Select a desired Polling Request call to be replied, using  w
Dial or [Y]/[Z], then push Dial or [ENT].
 The  Polling  Request  Reply  call  confirmation  screen  is  e
displayed. Push [CALL] to transmit the acknowledgement 
call.
 While transmitting the reply call, the screen shown below  r
is  displayed,  and  then  returns  to  the  normal  operating 
mode.
   MENU    ➪    DSC Calls    ➪    Polling Reply
   (Push [MENU])        
(Rotate Dial, then push [ENT].)

52
7DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Receiving DSC calls ■
 Receiving a Distress Call/Distress Acknowl- D
edgement
[Example]: Receiving a Distress Call.
When a Distress Call is received:
The emergency alarm sounds for 2 minutes. ➥
 “RCVD DISTRESS” pops up and the backlight blinks. ➥
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
Push a softkey to select your desired action. w
  [IGN]
Push to return to the normal operating mode. ➥
  
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACPT]
Push to accept the call. ➥
     And then, push [CH 16] to switch the operating channel 
to Channel 16, and then monitor it, as a coast station 
may require assistance.
  
operating channel automatically switches to Channel 16. (p. 
61)
Push

53
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 Receiving a Distress Relay Call/Distress Re- D
lay Acknowledgement
[Example]: Receiving a Distress Relay call.
When a Distress Relay call is received:
The emergency alarm sounds for 2 minutes. ➥
 “RCVD  DISTRESS  RELAY”  pops  up  and  the  backlight  ➥
blinks.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
Push a softkey to select your desired action. w
  [IGN]
Push to return to the normal operating mode. ➥
  
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACPT]
Push to accept the call. ➥
     And then, push [CH 16] to switch the operating channel 
to Channel 16, and then monitor it, as a coast station 
may require assistance.
  
operating channel automatically switches to Channel 16. (p. 
61)
Push

54
7DSC OPERATION
Receiving an Individual Call D
When an Individual Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD  INDIVIDUAL  CALL”  pops  up. The  backlight  may  ➥
blink for 2 minutes, depending on the received Category.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [IGN] 
➥
Push to ignore the Call and return to the normal operating 
mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
   [ACK]
 Push to display the “INDIVIDUAL ACK” screen to reply  ➥
to the Call. Select one of three options, depending on 
your situation. See page 30 for details of the Individual 
Acknowledgement procedure.
When “INDIVIDUAL ACK” is set to “Auto TX (Unable),” the 
transceiver automatically replies to the Call. In that case, 
both the TX and RX calls are stored in the Transmitted and 
Received Call Logs. 

55
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 Receiving  a  Group  Call/Geographical  Area  D
Call
[Example]: Receiving a Group call.
When a Group Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD GROUP CALL” pops up. The backlight may blink  ➥
for 2 minutes, depending on the received Category.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [IGN] 
 Push to ignore the Call and return to the normal operat- ➥
ing mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACPT]
 Push  to  monitor  the  channel  specified  by  the  calling  ➥
station  (Example: 08)  for  an  announcement  from  the 
calling station.
Note for Geographical Area Call
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.

56
7DSC OPERATION
Receiving an All Ships Call D
When an All Ships Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD ALL SHIPS CALL” pops up. The backlight may blink  ➥
for 2 minutes, depending on the received Category.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [IGN] 
 Push to ignore the Call and return to the normal operat- ➥
ing mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACPT]
 Push  to  monitor  the  channel  specified  by  the  calling  ➥
station  (Example: 16)  for  an  announcement  from  the 
calling station.

57
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Receiving a Position Request Call D
When a Position Request Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD POS REQUEST” pops up. The backlight blinks for  ➥
2 minutes.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [IGN] 
 Push to ignore the Call and return to the normal operat- ➥
ing mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACK]
 Push  to  display  the  “POSITION  REPLY”  screen  and  ➥
send a reply to the Call. (p. 39)
When “POSITION ACK” is set to “Auto TX,” the transceiver 
automatically replies to the Call. In that case, both the TX 
and RX calls are stored in the Transmitted and Received 
Call Logs.

58
7DSC OPERATION
Receiving a Position Report Call D
When a Position Report Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD POSITION REPORT” pops up. The backlight blinks  ➥
for 2 minutes.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [EXIT] 
 Push to ignore the Call and return to the normal operat- ➥
ing mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥

59
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Receiving a Polling Request call/Test Call D
[Example]: Receiving a Polling Request call.
When a Polling Request call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD  POLLING  REQUEST”  pops  up.  The  backlight  ➥
blinks for 2 minutes.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
 Push a softkey to select your desired action. w
  [IGN] 
 Push to ignore the Call and return to the normal operat- ➥
ing mode.
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
  [INFO]
Push to display the Received call information. (p. 58) ➥
  [ACK]
 Push to display the “POLLING REPLY” screen to reply  ➥
to the Call. (p. 43)
When “POSITION ACK” or “TEST ACK” is set to “Auto TX,” 
the  transceiver  automatically  replies  to  the  Call.  In  that 
case, both the TX and RX calls are stored in the Transmit-
ted and Received Call Logs. 

60
7DSC OPERATION
Receiving a Test Acknowledgement Call D
When a Test Acknowledgement Call is received:
The alarm sounds for 2 minutes. ➥
 “RCVD TEST ACK” pops up. The backlight blinks for 2 min- ➥
utes.
 Push  [ALARM  OFF]  to  stop  the  alarm  and  the  blinking  q
backlight.
 
may appear, depending on the received Category.
Push a softkey to select your desired action. w
  [EXIT] 
Push to return to the normal operating mode. ➥
  
    ” continues to blink and the Call is stored in the Received 
Call Log.
Transmitted Call log ■
The  transceiver  automatically  stores  up  to  50  transmitted 
calls, and the logs can be used as a supplement to your log-
book.
Enter “TX CALL LOG” in the DSC CALLS menu. q
 MENU ➪ DSC Calls ➪ Transmitted Call Log
  (Push [MENU])     
(Rotate Dial, then push [ENT].)
 
 
 Push [ wY]/[Z] to select the desired item, then push [ENT].
Rotate Dial to scroll the DSC message contents. e
Rotate
To delete the displayed DSC message, push [DEL]. r
 
Push [EXIT] to return to the normal operating mode. t

61
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Received Call log ■
The transceiver automatically stores up to 50 distress mes-
sages and 50 other messages, and they can be used as a 
supplement to your logbook.
  ” blinks in the upper right 
corner of the LCD when there is an unread DSC message.
Distress message D
 Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS  q
menu, or you can enter it through the Menu screen.
 MENU ➪ DSC Calls ➪ Received Call Log
  (Push [MENU])     
(Rotate Dial, then push [ENT].)
Push [ wY]/[Z] to select “Distress,” then push [ENT].
 
   ” appears when there are unread DSC messages.
   ” appears when there are no unread DSC messages.
 
 
 
 Push [ eY]/[Z] to select the desired item, then push [ENT].
Rotate Dial to scroll the DSC message contents. r
Rotate
To delete the displayed DSC message, push [DEL]. t
 
Push [EXIT] to return to the normal operating mode. y

62
7DSC OPERATION
Other messages D
 Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS  q
menu, or you can enter it through the Menu screen.
 MENU ➪ DSC Calls ➪ Received Call Log
  (Push [MENU])     
(Rotate Dial, then push [ENT].)
Push [ wY]/[Z] to select “Others,” then push [ENT].
 
   ” appears when there are unread DSC messages.
   ” appears when there are no unread DSC messages.
 
 
 
 Push [ eY]/[Z] to select the desired item, then push [ENT].
 
Rotate Dial to scroll the DSC message contents. r
 
DSC call type.
Rotate
To delete the displayed DSC message, push [DEL]. t
 
Push [EXIT] to return to the normal operating mode. y

63
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DSC Settings ■
D Position Input (See page 22)
D Add Individual ID/Group ID (See pages 19, 20)
D Delete Individual ID/Group ID (See page 21)
Automatic Acknowledgement  D
These items set the Automatic Acknowledgement function to 
“Auto TX” or “Manual TX.”
When  an  Individual,  Position  Request,  Polling  Request  or 
Test Call is received, the transceiver automatically transmits 
an Individual Acknowledgement, Position Reply, Polling Re-
ply or Test Acknowledgement Call, respectively.
When “INDIVIDUAL  ACK”  is  set  to  “Auto TX,”  the  trans-
ceiver  automatically  transmits  the  Acknowledgment  call 
including “Unable to Comply” (No Reason Given) after re-
ceiving the Individual call. 
 Enter  either  “INDIVIDUAL  ACK,”  “POSITION  ACK”  or  q
“TEST ACK” in the DSC Settings menu.
  MENU ➪ DSC Settings ➪ 
Individual ACK
  (Push [MENU])     
(Rotate Dial, then push [ENT].)
  MENU ➪ DSC Settings ➪ 
Position ACK
  MENU ➪ DSC Settings ➪ 
Test ACK
 Rotate Dial or push [ wY]/[Z] 
to select “Auto TX” or “Manual 
TX,” then push [ENT].
 
(default)
(default)
(default)
Push [EXIT] to return to the normal operating mode. e

64
7DSC OPERATION
 Channel 16 Switch function D
By regulation, after receiving  a  Distress call, the transceiv-
er switches the operating channel to Channel 16. However, 
when  this  setting  is  set  to  “OFF,”  the  function  enables  the 
transceiver  to  remain  on  the  operating  channel,  even  after 
receiving a Distress call.
Enter “CH 16 SWITCH”  q
in the DSC Settings menu
.
    MENU     ➪     DSC Settings    ➪    CH 16 Switch
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
 Rotate Dial or push [ wY]/[Z] to set the Channel 16 Switch 
function to “Auto (No Delay),” “10 Second Delay” or “OFF,” 
then push [ENT].
 
(default)
  Auto (No Delay)  :  After  receiving  a  Distress  call,  and 
[ACPT] is pushed on the confirmation 
screen,  the  transceiver  immediately 
switches to Channel 16.
  10 Second Delay  :  After  receiving  a  Distress  call,  and 
[ACPT] is pushed on the confirmation 
screen, the transceiver remains on the 
current operating channel for 10 sec-
onds. After that, the transceiver auto-
matically switches to Channel 16.  
(default)
  OFF  :  Even  after  receiving  a  Distress  call, 
the transceiver remains on the operat-
ing channel.
    ” appears.
Push [EXIT] to return to the normal operating mode. e

65
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Alarm D
Set the  Alarm  function ON  or  OFF, depending  on the  Cat-
egory or Status.
Enter “ALARM” in the DSC Settings menu. q
    MENU     ➪     DSC Settings    ➪    Alarm
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
Rotate Dial or push [ wY]/[Z] to select the status, then push 
[ENT].
 
 
selectable. (default: ON )
Rotate Dial or push [ eY]/[Z] to set the Alarm setting to “ON” 
or “OFF.”
Push [EXIT] to return to the normal operating mode. r
Channel 70 Squelch level D
Set the squelch level on Channel 70.
The  transceiver  has  11  squelch  levels  between  1  (loose 
squelch) and 10 (tight squelch) and OPEN.
OPEN is completely open.
Enter “CH 70 SQL LEVEL” in the DSC Settings menu. q
    MENU    ➪    DSC Settings    ➪    CH 70 SQL Level
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
 Rotate Dial or push [ wY]/[Z] to adjust the squelch level until 
the noise just disappears, then push [ENT].
 
(default)
Push [EXIT] to return to the normal operating mode. e

66
7DSC OPERATION
DSC Loop Test D
The DSC loop test function  sends  transmit  DSC  signals  to 
the receive AF circuit to compare and check the TX and RX 
signals at the AF level.
Enter “DSC LOOP TEST” in the DSC Settings menu. q
    MENU  ➪    DSC Settings    ➪    DSC Loop Test
   (Push [MENU])        
(Rotate Dial, then push [ENT].)
Push [ENT] to start the DSC loop test. w
 
 
“OK” appears.
Push [EXIT] to return to the normal operating mode. e
If “NG” appears in step w, either or both TX and RX DSC 
circuits has a problem. In that case, you will have to send 
the transceiver to your nearest dealer for repair. 

71
7
DSC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
When  the  optional  MA-500TR  CLASS  B  AIS TRANSPON-
DER is connected to your transceiver, an individual DSC call 
can be transmitted to a selected AIS target, without needing 
to enter the target’s MMSI code. In this case, the call type is 
automatically set to Routine.
See page 73 for connecting instructions.
To  ensure  correct  operation  of  the  DSC  function,  make 
sure you correctly set the CH70 SQL LEVEL. (p. 63)
Step 1: Transponder’s operation
 Select a desired AIS target on the plotter, target list or dan- q
ger list display.
 
the AIS target is displayed.
 -
erwise, you cannot make an individual DSC call using the tran-
sponder.
 Push [DSC] to display the voice channel selection screen,  w
and then push [Y] or [Z] to select a desired voice chan-
nel*.
 -
mended order.
    * When a coast station is selected in step q, a voice channel will 
be specified by the coast station, therefore you cannot change 
the  channel.  The  transponder  will  display  “Voice  Channel  is 
specified by the Base station,” in this case.
 Push [DSC] to transmit an individual DSC call to the AIS  e
target.
 
becomes clear.
 -
play “DSC Transmission FAILED.”
Making an Individual call using an AIS transponder ■
Transponder’s display Transceiver’s display
Transponder’s display Transceiver’s display

72
7DSC OPERATION
 After making the individual DSC call, the transponder will  r
display “DSC Transmission COMPLETED.”
 -
tered the voice channel selection screen in step w.
 -
ment is received.
Step 2: Transceiver’s operation
 When the acknowledgement is received, beeps sound. t
 If  the  acknowledgement ‘Able  to  comply’  is  received,  ➥
push [ALARM OFF] to stop the beeps, and then select 
the intership channel specified in step w.
  
called cannot use the channel.
  
  
of the AIS target on the display.
 If the acknowledgement ‘Unable to comply’ is received,  ➥
push [ALARM OFF] to stop the beeps, and then “INDI-
VIDUAL CALL FAILED” is displayed.
 After the communication is finished, push [EXIT] to return  y
to the normal operating mode.
Transponder’s display Transceiver’s display
[DSC]
[CLEAR]
[Z]
[Y]
TRANSPONDER
‘Able to comply’ is received
‘Unable to comply’ is received

73
8
MENU SCREEN OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 ■Menu screen operation
The  Menu  screen  is  used  for  programming  infrequently 
changed values, function settings or sending DSC calls.
In addition to this page, see pages 67 through 71 for details.
 DEntering the Menu screen and operation
Example: Set the channel group to “USA.”
Push [MENU]. q
 Rotate Dial or push [ w∫]/[√] to select 
the  root  item  (Radio  Settings),  and 
then push [ENT].
 ∫] or [√] is continuously held down, 
the items are sequentially highlighted.
 Rotate  Dial  or  push  [ e∫]/[√]  to  se-
lect  “CHAN  Group,”  and  then  push 
[ENT].
 Rotate Dial or push [ r∫]/[√] to select 
“USA,” and then push [ENT] to set it.
 ✔” is displayed next to “USA.”
 Push  [EXIT]  to  exit  the  Menu  t
screen.
       
the previous screen.
[ENT][Y]/[Z]
[CLEAR][EXIT] [ENT][BACK] Dial
[MENU]
Menu lists

74
8MENU SCREEN OPERATION
Menu screen items ■
The Menu screen contains the following items.
DSC Calls D
Item Ref. Item Ref.
 p. 27
Received
 Call Log
p. 58
1p. 31
Position Request Call*2
 p. 32
Position Report Call*2
 p. 34
Polling Request Call*2
 p. 24  p. 35
 p. 57 1p. 37
*1Appears only after receiving a corresponding call.
*2Only U.S.A and Australian version transceivers.
DSC Settings D
Item Ref. Item Ref.
3p. 22  p. 60
 p. 19  p. 61
 p. 20  p. 62
 p. 60  p. 63
 p. 60  p. 63
*3Appears only when no GPS information is received.
Radio Settings D
Item Ref. Item Ref.
 p. 68  p. 68
 p. 68  p. 68
Configuration D
Item Ref. Item Ref.
 p. 69  p. 70
 p. 69  p. 71
 p. 69  p. 71
 p. 69  p. 71
MMSI/GPS Info D
The  transceiver  shows  the  programmed  MMSI  and  ATIS*3 
codes and GPS information*5.
If the code is not programmed, “NO DSC MMSI” or “NO ATIS 
MMSI”*4 is displayed.
*4  Appears only for the Dutch and  German version transceivers.
*5  Appears only when a GPS receiver compatible with NMEA 0183 
(ver. 2.0 or later) or is connected.
Rotate

75
8
MENU SCREEN OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Radio Settings items ■
Scan type  D(Default: Priority Scan)
The transceiver has two scan types; Normal scan and Priority 
scan. A Normal scan searches all Favorite channels  in the 
selected channel group. A Priority scan sequentially searches 
all Favorite channels, while monitoring Channel 16.
Scan resume timer  D(Default: OFF)
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.
•Normalscan  When  ON  is  selected,  the  scan  pauses  for  5 
seconds and then resumes, even if a signal has 
been received on any channel.
Priority scan   When  ON  is  selected,  the  scan  pauses  for  5 
seconds and then resumes, even if a signal has 
been received on any channel other than Chan-
nel 16.
Dual/Tri-watch  D(Default: Dualwatch)
This item can be selected as Dualwatch or Tri-watch. (p. 18)
Channel Group  D(Default: INT)
Except for the Europe version, a channel group suitable for 
your operating area can be selected. Depending on the trans-
ceiver version, INT, USA, ATIS or DSC may be selectable.
See page 10 for details.

76
8MENU SCREEN OPERATION
Configuration items ■
Backlight  D(Default: 7)
The function display and keys can be backlit for better visibil-
ity under low light conditions.
The backlight can be set to 7 levels and OFF.
Display contrast  D(Default: 5)
This item adjusts the contrast of the LCD in 8 steps. 
Level 1 is the lowest contrast, and level 8 is the highest con-
trast. 
Key Beep  D(Default: ON)
You can turn OFF beep tones for silent operation, or you can 
turn ON the tones to have confirmation beeps sound when a 
key is pushed.
Key Assignment D
Desired functions can be assigned to Dial and the softkeys.
 When the “KEY ASSIGNMENT” screen is displayed, rotate  q
Dial or push [∫]/[√] to select “Dial” or “Softkeys,” and then 
push [ENT].
 Rotate Dial or push [ w∫]/[√] to select the desired position, 
and then push [ENT].
 
 Rotate Dial or push [ e∫]/[√] to select the option, and then 
push [ENT] to set it.
 ✔” is displayed next to the selected option.
*  [CHAN] appears instead of [CH/WX] only for Chinese version trans-
ceiver.
For “Dial” assignment For “Softkeys” assignment
For “Dial” assignment For “Softkeys” assignment

77
8
MENU SCREEN OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Push [EXIT] to exit the Menu screen. r
 
•Dialassignment
The Audio volume (VOL), squelch (SQL), channel selection 
(CHAN) and LCD backlight level (Backlight) functions can be 
assigned to any one of 4 sequential positions on Dial. Push-
ing Dial 1  to  4 times sequentially selects  the  desired func-
tion, and rotating Dial adjusts the level or selects a value or 
number.
For example:
-  VOL is  assigned  the  1st  position,  and  pushing  Dial  once 
selects VOL. The VOL screen adjust screen is displayed and 
rotating Dial adjusts the audio volume.
-  CH is assigned to the 3rd position, and pushing Dial three 
times selects CH. The channel number is displayed and ro-
tating Dial will select the desired channel.
You can assign VOL, SQL, CHAN and Backlight to any one of 
the 1st, 2nd, 3rd, or 4th sequential positions.
Repeatedly  pushing  Dial  sequentially  displays all  the  func-
tions in the order they are assigned, and skips any functions 
assigned as Not Used.
•Softkeysassignment
The desired  function  can be  assigned as  the  softkey  func-
tion. The assigned function can be used when its key icon is 
displayed.
See page 3 for details of the assignable key functions.
UTC Offset  D(Default: 00:00)
Set the offset time between the UTC (Universal Time Coordi-
nated) and your local time to between –14:00 and +14:00 (in 
1 minute steps). 

78
8MENU SCREEN OPERATION
Inactivity Timer D
Set  the  inactivity  timer  to  between 1  and  10  minutes  (in  1 
minute steps) or OFF for the “Not DSC Related” item, and set 
to between 1 and 15 minutes (in 1 minute steps) or OFF for 
the “DSC Related” item.
 When the “INACTIVITY TIMER” screen is displayed, rotate  q
Dial or push [Y]/[Z] to select “Not DSC Related” or “DSC 
Related,” and then push [ENT].
 Rotate Dial or push [ wY]/[Z] to select the option, and then 
push [ENT] to set it.
 ✔” is displayed next to the selected option.
Push [EXIT] to exit the Menu screen. e
 
•NotDSCRelated (Default: 10 min)
When the LCD displays a screen other than the normal op-
eration screen, or  one  not related  to the DSC, and no  key 
operation occurs for this set period, the transceiver automati-
cally returns to the normal operating screen.
•DSCRelated (Default: 15 min)
When the LCD displays the screen related to the DSC, and 
no key operation occurs for this set period, except during dis-
tress operation, the transceiver automatically returns to the 
normal operating screen.

79
8
MENU SCREEN OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NMEA Output D
Select the option for the Data Output function.
•POSdataoutput (Default: ON)
When receiving a position data, this function makes the trans-
ceiver send the position data from its NMEA Output port to a 
connected device.
•DSCdataoutput (Default: OFF)
When receiving  a  DSC  call,  this  function  makes the  trans-
ceiver send the DSC data  from  its  NMEA Output  port to a 
connected device.
  All Stations  :  Outputs the call from any vessel from the 
NMEA Output port.
  Station List  :  Outputs the call from any vessels listed on 
the Individual ID screen.
  OFF    :  Does  not  output any call to  the  external 
equipment.
Remote ID  D(Default: 15)
Set a Remote ID number to between 1 and 69. 
The Remote ID is included in the sentence of the Icom origi-
nal NMEA format.

80
CONNECTIONS AND MAINTENANCE
9
Connections ■
e
t
q
w
r
q ANTENNA CONNECTOR
   Connects to a marine VHF antenna cable’s PL-259 con-
nector.
 CAUTION: Transmitting without an antenna may dam-
age the transceiver.
w NMEA IN/OUT LEADS
 Brown:TalkerB(Data-L),NMEAIn(–)
 White:TalkerA(Data-H),NMEAIn(+)
   Connect to NMEA In lines of a PC or NMEA 0183 (ver. 2.0 
or later) sentence format DSC, DSE compatible navigation 
equipment, to receive position data from other ships.
 Green:ListenerB(Data-L),NMEAOut(–)
 Yellow:ListenerA(Data-H),NMEAOut(+)
   Connect to NMEA Out lines of a GPS receiver for position-
data.
 
sentence format compatible GPS receiver is required. Ask your 
dealer about suitable GPS receivers.
e AF OUT LEADS
 Blue:ExternalSpeaker(+)
 Black:ExternalSpeaker(–)
  Connects to an external speaker.
 Orange:Dataline
 Gray:Dataline
  Used only for maintenance purpose. 
NOTEforNMEAIn/OutandAFOutleads:
The connectors are attached to keep the leads together.
Before connecting to a piece of equipment, you should cut 
the leads to remove the connector.

81
9
CONNECTIONS AND MAINTENANCE
r DC POWER CONNECTOR
  Connects to a 13.8 V DC power source. 
CAUTION: After connecting the DC power cable, NMEA 
leads or external speaker leads, cover the connector and 
leads with an adhesive tape, as shown below, to prevent 
water seeping into the connection.
Rubber vulcanizing
tape
t GROUND TERMINAL
   Connects to a vessel ground to prevent electrical shocks 
and  interference from  other  equipment  occurring.  Use  a 
PH M3 × 6 screw (not supplied).
Connect to the MA-500TR D
Connect  the  transceiver  to  the  high-density  D-Sub  15-pin 
connector of the MA-500TR using the OPC-2014* cable. Af-
ter connecting, an Individual  DSC  call can be made  to  the 
AIS target using the transponder without entering the target’s 
MMSI code.
* The OPC-2014 is supplied with the MA-500TR
•ListenerA(Data-H)lead(Yellow):
  Connects to lead 3 of the OPC-2014.
•ListenerB(Data-L)lead(Green):
  Connects to lead 2 of the OPC-2014.
•TalkerA(Data-H)lead(White):
  Connects to lead 5 of the OPC-2014.
•TalkerB(Data-L)lead(Brown):
  Connects to lead 4 of the OPC-2014.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

82
9CONNECTIONS AND MAINTENANCE
Antenna ■
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.
Fuse replacement ■
One fuse is installed in the supplied DC power cable. If the 
fuse blows or the transceiver stops functioning, track down 
the source of the problem, repair it, and replace the damaged 
fuse with a new one of the proper rating.
Fuse rating: 10 A
Cleaning ■
If the transceiver becomes dusty or dirty, wipe it clean with a 
soft, dry cloth.
  DO  NOT  use  harsh  solvents  such  as  benzine  or 
alcohol, as they will damage transceiver surfaces.
Supplied accessories ■
Mounting bracketFor mounting bracket
DC power cable 
(OPC-891A)
Microphone hanger 
and screws (3×16 mm)
Knob bolts
Screws (5×20 mm)
Flat washers (M5)
Spring washers (M5)

83
9
CONNECTIONS AND MAINTENANCE
Mounting the transceiver ■
Using the supplied mounting bracket D
The universal mounting bracket supplied with your transceiv-
er allows overhead or dashboard mounting.
 Mount the bracket securely to a surface which is more than  q
10 mm thick and can support more than 5 kg using the 2 
supplied screws (5 × 20 mm).
 Attach the transceiver to the bracket so that the face of the  w
transceiver is at 90° to your line of sight when operating it.
KEEP  the  transceiver  and  microphone  at  least  1  meter 
away from the vessel’s magnetic navigation compass.
NOTE:  Check the installation  angle; the function  display 
may not be easy-to-read at some angles.
NOTEfortheIC-M323G/IC-M324G:
IC-M323G/IC-M324G’s GPS is located at the right top of 
the front panel. 
If the transceiver is covered with any object that inteerupts 
the GPS signals from the satelites, the GPS receiver will 
not culculate its position.
Therefore, when you using the GPS feature, be sure the 
transceiver is positioned so the antenna has a clear view 
to receive signals from satellites.
• OVERHEAD MOUNTING
• MOUNTING ON THE BOARD
These bolts are shown  a 
mounting example only. 
Not supplied with  accesso-
ries.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

84
9CONNECTIONS AND MAINTENANCE
MB-132 installation ■
An optional MB-132 flush mount is available for mounting the 
transceiver to a flat surface, such as an instrument panel.
KEEP  the  transceiver  and  microphone  at  least  1  meter 
away from your vessel’s magnetic navigation compass.
 Using the template on page 81, carefully cut a hole into  q
the instrument panel, or wherever you plan to mount the 
transceiver.
Slide the transceiver through the hole, as shown below. w
 Attach the clamps on either side of the transceiver with 2  e
M5 × 8 mm supplied bolts.
 
 Tighten the end bolts on the clamps (clockwise) so that the  r
clamps press  firmly  against the  inside of  the instrument 
control panel.
 Tighten  the  locking  nuts  (counterclockwise)  so  that  the  t
transceiver is securely mounted in position, as shown be-
low.
 Connect the antenna and power cable, then return the in- y
strument control panel to its original place.
r
t

85
10
SPECIFICATIONS AND OPTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Specifications ■
General D
Frequency coverage  :  Tx 156.000–161.450 MHz 
Rx 156.000–163.425 MHz
Mode  :  FM (16K0G3E),  
DSC (16K0G2B)
Channel spacing  : 25 kHz
Operating temp. range  : –20°C to +60°C
Current drain (at 13.8 V)  :  TX high  5.5 A maximum 
Max. audio 1.5 A maximum
Power supply requirement  :  13.8 V DC nominal 
(negative ground)
Frequency stability  : ±1.5 kHz (–20°C to +60°C)
Antenna impedance  : 50  Ω nominal
Dimensions (approximately) :  180(W) × 82(H) × 135(D) mm 
(Projections not included)
Weight (approximately)  : 1.2 kg
Transmitter D
Output power  : 25 W/1 W
Modulation system  :  Variable reactance frequency 
modulation
Max. frequency deviation  : ±5.0 kHz
Spurious emissions  : Less than 0.25 µW
Receiver D
Receive system  :  Double conversion 
superheterodyne
Sensitivity (20 dB SINAD)  : –5 dBµ emf (typical)
Squelch sensitivity  : Less than –2 dBµ emf
Intermodulation rejection ratio  : More than 68 dB
Spurious response rejection ratio: 
        More than 70 dB
Adjacent channel selectivity : More than 70 dB
Audio output power  :  More than 2 W at 10% 
distortion with a 4 Ω load
All stated  specifications  are subject to  change  without notice 
or obligation.

86
10 SPECIFICATIONS AND OPTIONS
Dimensions D
119.9
82
164.1
25.3
109.7
61.4
Unit: mm
180
Options ■
MB-132 F L U S H  MOUNT K I T
  To mount the transceiver to a panel.
MA-500TR C L A S S  B A I S  T R A N S P O N D E R
   To transmit individual DSC calls to a selected AIS targets.
Approved  Icom  optional  equipment  is  designed  for  optimal  perfor-
mance when used with an Icom transceiver.
Icom  is  not  responsible  for the  destruction  or  damage  to  an  Icom 
transceiver in the event the Icom transceiver is used with equipment 
that is not manufactured or approved by Icom.

87
11
CHANNEL LIST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
• International channels
CH Frequency (MHz) CH Frequency (MHz) CH Frequency (MHz) CH Frequency (MHz) CH Frequency (MHz) CH Frequency (MHz)
Transmit ReceiveTransmit ReceiveTransmit ReceiveTransmit ReceiveTransmit ReceiveTransmit Receive
01 156.050 160.650 11 156.550 156.550 21 157.050 161.650 61 156.075 160.675 71 156.575 156.575 81 157.075 161.675
02 156.100 160.700 12 156.600 156.600 22 157.100 161.700 62 156.125 160.725 72 156.625 156.625 82 157.125 161.725
03 156.150 160.750 13 156.650 156.650 23 157.150 161.750 63 156.175 160.775 73 156.675 156.675 83 157.175 161.775
04 156.200 160.800 14 156.700 156.700 24 157.200 161.800 64 156.225 160.825 74 156.725 156.725 84 157.225 161.825
05 156.250 160.850 15*2156.750 156.750 25 157.250 161.850 65 156.275 160.875 75*4156.775 156.775 85 157.275 161.875
06 156.300 156.300 16 156.800 156.800 26 157.300 161.900 66 156.325 160.925 76*4156.825 156.825 86 157.325 161.925
07 156.350 160.950 17*2156.850 156.850 27 157.350 161.950 67 156.375 156.375 77 156.875 156.875 87 157.375 157.375
P4*3161.425 161.425
88 157.425 157.425
08 156.400 156.400 18 156.900 161.500 28 157.400 162.000 68
69
156.425 156.425 78 156.925 161.525
09 156.450 156.450 19 156.950 161.550 37A*3157.850 157.850 156.475 156.475 79 156.975 161.575
10 156.500 156.500 20 157.000 161.600 60 156.025 160.625 70*1156.525 156.525 80 157.025 161.625
*1  DSC operation only.
*3  UK Marina Channels: M1=37A (157.850 MHz), M2=P4 (161.425 MHz) for U.K. version only
*2  Channels 15 and 17 may also be used for on-board communications provided the effective radiated power does not exceed 1 W, 
and subject to the national regulations of the administration concerned when these channels are used in its territorial waters. 
*4  The output power of channels 75 and 76 are limited to low power (1 W) only. The use of these channels should be restricted to 
navigation-related communications only and all precautions should be taken to avoid harmful interference to channel 16, e.g. 
by means geographical separation.

88
11 CHANNEL LIST
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.
*1 Low power only. *2 Momentary high power. *3 DSC operation only.
• USA/CAN channels           (for U.S.A and U.K. version only)
*5 For U.S.A version only.
Channel number Frequency (MHz)
03 156.150 160.750
03A 156.150 156.150
02 156.100 160.700
04A 156.200 156.200
05A 05A 156.250 156.250
06 06 156.300 156.300
07A 07A 156.350 156.350
08 08 156.400 156.400
09 09 156.450 156.450
10 10 156.500 156.500
11 11 156.550 156.550
12 12 156.600 156.600
13*213*1
156.650 156.650
14 14
156.700 156.700
15*215*1
156.750 156.750
16 16
156.800 156.800
17*117*1
156.850 156.850
18A 18A
156.900 156.900
19A 19A 156.950 156.950
20 20*1157.000 161.600
20A 157.000 157.000
01A 156.050 156.050
USA
01
156.050 160.650
CAN
Transmit Receive
Channel number Frequency (MHz)
22A 22A 157.100 157.100
23 157.150 161.750
21b Rx only 161.650
23A 157.150 157.150
24 24 157.200 161.800
25 25 157.250 161.850
25b Rx only 161.850
26 26 157.300 161.900
27 27 157.350 161.950
28 28 157.400 162.000
28b Rx only 162.000
60 156.025 160.625
61A 61A 156.075 156.075
62A 156.125 156.125
63A 156.175 156.175
64 156.225 160.825
64A 64A 156.225 156.225
65A 65A 156.275 156.275
66A 66A*1156.325 156.325
67*267 156.375 156.375
21A 21A 157.050 157.050
USA
21 157.050 161.650
CAN
Transmit Receive
Channel number Frequency (MHz)
71 71 156.575 156.575
72 72 156.625 156.625
73 73 156.675 156.675
70*370*3156.525 156.525
74 74 156.725 156.725
75*175*1156.775 156.775
76*176*1156.825 156.825
77*177*1156.875 156.875
78A 78A 156.925 156.925
79A 79A 156.975 156.975
80A 80A 157.025 157.025
81A 81A 157.075 157.075
82A 82A 157.125 157.125
83 157.175 161.775
83A 83A 157.175 157.175
83b Rx only 161.775
84 84 157.225 161.825
84A 157.225 157.225
85 85 157.275 161.875
85A 157.275 157.275
86 86 157.325 161.925
69 69 156.475 156.475
68
USA
68 156.425 156.425
CAN
Transmit Receive
88 88 157.425 162.025
88A 157.425 157.425
87A 157.375 157.375
87 87 157.375 161.975
86A 157.325 157.325
Frequency (MHz)
RX only 162.425
RX only 162.450
RX only 162.500
RX only 162.475
RX only 162.525
RX only 161.650
RX only 161.775
RX only 163.275
RX only 162.400
RX only 162.550
Transmit Receive
*5WX channel
4
5
6
3
7
8
9
10
2
1
P4*4P4*4161.425 161.425
*4  UK Marina Channels: M1=37A (157.850 MHz), M2=P4 (161.425 MHz) 
    for U.K. version only

89
12
TEMPLATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Cut here
Unit: mm
R12 (Max.)
180
82
165.1
62.4

91
13
TROUBLE SHOOTING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PROBLEM POSSIBLE CAUSE SOLUTION REF.
The  transceiver  does 
not turn ON.
 
power supply.
p. 72
Little or no sound comes 
from the speaker.
-
tion.
p. 14
p. 14
p. 15
Transmitting is impossi-
ble, or high power can-
not be selected.
     
power or receive only by regulations.
pp. 9, 
10, 79
p. 11
Scan does not start.     -
nels.
p. 17
No beep sounds.  -
TION menu.
p. 69
Distress calls cannot be 
transmitted.
       -
grammed.
 p. 7

MEMO

MEMO

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan
A-7182D-1EX
Printed in Japan
© 2014 Icom Inc.
Printed on recycled paper with soy ink.
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