Genius Marine Radio IC M21 User Manual

INSTRUCTION MANUAL  
VHF MARINE TRANSCEIVER  
iM21  
 
FOREWORD  
FEATURES  
Thank you for purchasing this Icom product. The IC-M21 VHF  
MARINE TRANSCEIVER is designed and built with Icom’s su-  
perior technology and craftsmanship. With proper care this  
product should provide you with years of trouble-free operation.  
Water resistant construction  
Built tough to withstand the punishing marine environ-  
ment, the IC-M21 meets JIS water resistant specification  
grade 7 while using BP-223 or BP-224.  
Dual watch and tri-watch functions*  
Convenient functions which allow you to monitor the dis-  
tress channel (Ch 16) while receiving a channel of your  
choice—dual watch; or monitor the distress channel and  
another channel while receiving a channel of your  
choice—tri-watch.  
IMPORTANT  
READ ALL INSTRUCTIONS carefully and com-  
pletely before using the transceiver.  
*This function may not be available depending on version.  
SAVE THIS INSTRUCTION MANUAL—This in-  
struction manual contains important operating instructions for  
the IC-M21.  
Large, easy-to-read LCD  
With dimensions of 24(H) × 35(W) mm, the IC-M21’s func-  
tion display is easy to read and shows operating condi-  
tions at a glance. Backlighting and contrast can be  
adjusted to suit your preferences.  
EXPLICIT DEFINITIONS  
WORD  
RWARNING  
CAUTION  
NOTE  
DEFINITION  
Simple operation  
Personal injury, re hazard or electric shock  
Ergonomic design with a minimum number of switches  
and controls provides simple intuitive operation.  
may occur.  
Equipment damage may occur.  
If disregarded, inconvenience only. No risk  
of personal injury, re or electric shock.  
ii  
 
CAUTIONS  
BE CAREFUL! The transceivers right-side panel will  
RWARNING! NEVER connect the transceiver to an  
AC outlet. This may pose a re hazard or result in an electric  
shock.  
become hot when operating continuously for long periods.  
BE CAREFUL! The IC-M21 employs water resistant  
construction, which corresponds to JIS water resistant speci-  
cation, grade 7 (1 m; 3 ft depth for 30 min.). However, once  
the transceiver has been dropped, water resistant cannot be  
guaranteed due to the fact that the transceiver may be  
cracked, or the water resistant seal damaged, etc.  
RWARNING! NEVER hold the transceiver so that the  
antenna is very close to, or touching exposed parts of the  
body, especially the face or eyes, while transmitting. The  
transceiver will perform best if the microphone is 5 to 10 cm  
(2 to 4 inches) away from the lips and the transceiver is verti-  
cal.  
MAKE SURE the exible antenna and battery pack are  
securely attached to the transceiver, and that the antenna and  
battery pack are dry before attachment. Exposing the inside  
of the transceiver to water will result in serious damage to the  
transceiver.  
NEVER connect the transceiver to a power source other  
than the BP-223 or BP-224. Such a connection will ruin the  
transceiver.  
AVOID using or placing the transceiver in direct sunlight or  
in areas with temperatures below 15°C or above +55°C.  
Versions of the IC-M21 which display the CE”  
symbol on the serial number seal, comply with  
the essential requirements of the European Radio  
and Telecommunication Terminal Directive 1999/5/EC.  
This warning symbol indicates that this equipment oper-  
ates in non-harmonised frequency bands and/or may be sub-  
ject to licensing conditions in the country of use. Be sure to  
check that you have the correct version of this radio or the  
correct programing of this radio, to comply with national li-  
censing requirement.  
KEEP the transceiver out of the reach of children.  
KEEP the transceiver at least 0.9 meter (3.0 ft) away from  
your vessels magnetic navigation compass.  
Icom, Icom Inc. and  
are registered trademarks of Icom Incorporated  
(Japan) in the United States, United Kingdom, Germany, France, Spain, Russia  
and/or other countries.  
iii  
 
TABLE OF CONTENTS  
IN CASE OF EMERGENCY ................................................ i  
RECOMMENDATION ........................................................... i  
FOREWORD ....................................................................... ii  
IMPORTANT ........................................................................ ii  
EXPLICIT DEFINITIONS ..................................................... ii  
FEATURES .......................................................................... ii  
CAUTIONS ......................................................................... iii  
TABLE OF CONTENTS ...................................................... iv  
5 SCAN OPERATION ................................................ 1112  
Scan types ................................................................. 11  
Setting tag channels .................................................. 12  
Starting a scan .......................................................... 12  
6 SET MODE ............................................................. 1316  
SET mode programming ........................................... 13  
SET mode items ........................................................ 13  
7 BATTERY CHARGING ........................................... 1719  
Battery charging ........................................................ 17  
Battery cautions ......................................................... 17  
Installing batteries in the battery case ....................... 18  
Optional battery chargers .......................................... 19  
1 OPERATING RULES ...................................................... 1  
2 PANEL DESCRIPTION ............................................... 25  
Front, top and side panels............................................ 2  
Function display .......................................................... 4  
8 SUPPLIED ACCESSORIES AND ATTACHMENTS 2022  
9 TROUBLESHOOTING .................................................. 23  
10 CHANNEL LIST ........................................................... 24  
3 BASIC OPERATION ................................................... 69  
Channel selection ........................................................ 6  
Lock function ............................................................... 7  
Adjusting the squelch level .......................................... 7  
Receiving and transmitting .......................................... 8  
Call channel programming .......................................... 9  
Automatic backlighting ................................................ 9  
11 SPECIFICATIONS AND OPTIONS .............................25  
Specications ........................................................... 25  
Options ..................................................................... 25  
4 DUALWATCH/TRI-WATCH .......................................... 10  
Description ................................................................ 10  
Operation ................................................................... 10  
DECLARATION OF CONFORMITY  
iv  
 
OPERATING RULES  
1
(2) OPERATORS LICENSE  
DPriorities  
A restricted Radiotelephone Operator Permit is the license  
most often held by small vessel radio operators when a radio  
is not required for safety purposes.  
Read all rules and regulations pertaining to priorities and  
keep an up-to-date copy handy. Safety and distress calls  
take priority over all others.  
The Restricted Radiotelephone Operator Permit must be  
posted near the transceiver or be kept with the operator. Only  
a licensed radio operator may operate a transceiver.  
You must monitor Channel 16 when you are not operating  
on another channel.  
False or fraudulent distress calls are prohibited under law.  
However, non-licensed individuals may talk over a transceiver  
if a licensed operator starts, supervises, ends the call and  
makes the necessary log entries.  
DPrivacy  
Information overheard but not intended for you cannot law-  
fully be used in any way.  
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 regulations.  
Indecent or profane language is prohibited.  
DRadio licenses  
(1) SHIP STATION LICENSE  
When your craft is equipped with a VHF FM transceiver, you  
must have a current radio station license before using the  
transceiver. It is unlawful to operate a ship station which is not  
licensed.  
Inquire through your dealer or the appropriate government  
agency for a Ship-Radiotelephone license. This license in-  
cludes the call sign which is your crafts identication for radio  
purposes.  
1
 
PANEL DESCRIPTION  
2
Front, top and side panels  
q DIAL/CHANNEL GROUP SWITCH [DIAL]  
Selects and changes the regular channels.  
(p. 6)  
Selects one of 2 regular channels in se-  
quence when pushed for 1 sec. (p. 6)  
t TRANSMIT POWER/LOCK SWITCH  
[H/LLOCK]  
Selects high, middle or low power when  
pushed. (p. 8)  
Toggles the lock function ON/OFF when  
pushed for 1 sec. (p. 7)  
o
- International and U.S.A. (U.K. version only)  
i
channels* are available for regular channels.  
*Germany version is International and ATIS  
channels.  
y DUALWATCH/TRI-WATCH SWITCH  
[DWTRI] (p. 10)  
Starts dualwatch when pushed momentarily.  
Starts tri-watch when pushed for 1 sec.  
Stops dualwatch/tri-watch when either is acti-  
vated.  
w CHANNEL UP/DOWN SWITCHES [Y]/[Z]  
!
Select an operating channel.  
Selects the SET mode condition of the item.  
(p. 13)  
Set the squelch level in the squelch set mode.  
(p. 7)  
u SQUELCH SWITCH [SQLMONI] (p. 7)  
Push this switch, then set the squelch level  
with [Y]/[Z].  
Manually opens the squelch for channel mon-  
itoring when pushed for 1 sec.  
e CHANNEL 16 SWITCH [16C]  
Selects Channel 16 when pushed. (p. 6)  
Selects the call channel when pushed for  
1 sec.  
Enters call Channel write mode when the call  
channel is selected and this switch is pushed  
for 3 sec. (p. 9)  
q
u
i ANTENNA (p. 20)  
Connects the supplied antenna.  
y
t
r
w
e
o VOLUME CONTROL [OFF/VOL]  
Turns power ON and adjusts the audio level.  
r SCAN/TAG SWITCH [SCNTAG] (p. 12)  
Starts and stops normal or priority scan.  
Sets and clears the displayed channel as a  
tag (scanned) channel when pushed for  
1 sec.  
! PTT SWITCH [PTT]  
Push and hold to transmit; release to receive.  
2
 
2
PANEL DESCRIPTION  
CAUTION!:  
ï BATTERY CASE RELEASE SCREW  
To remove the battery case:  
When attaching or releasing a battery pack, make sure the  
rubber seal is set in the groove of the battery pack/case  
correctly. If the seal is not neatly in the groove it may be  
damaged when attaching the battery pack/case.  
If the seal is damaged, water resistant is not guaranteed.  
Turn the screw counterclockwise, then pull the battery pack  
in the direction of the arrow as shown below.  
To attach the battery case:  
Insert the battery case in the IC-M21 completely, then turn the  
screw clockwise.  
NOTE:  
When attaching a battery pack/case, make sure dust etc.  
does not adhere to the rubber seal. If dust etc. is on the seal  
when attaching a battery pack/case, the water resistant may  
be reduced.  
NOTE: When removing or attaching the battery case, use a  
coin or at-head screwdriver to loosen or tighten the  
bottom screw.  
Make sure both the rubber seal (purple) is set to the groove  
correctly and dust etc. does not adhere to it.  
Screw position  
when removing battery  
OPEN  
Screw position  
when attaching battery  
Correct position  
Incorrect position  
Rubber seal  
Groove  
OPEN  
Battery pack/case  
Battery pack/case  
3
 
2
PANEL DESCRIPTION  
Function display  
q TRANSMIT INDICATOR (p. 8)  
Appears while transmitting.  
w BUSY INDICATOR (p. 8)  
Appears when receiving a signal or when the squelch  
opens.  
q
w
e
r
t
e TAG CHANNEL INDICATOR (p. 12)  
Appears when a tag channel is selected.  
y
!
!
u
i
r SCAN INDICATOR (p. 12)  
Blinks while scanning.  
t CALL CHANNEL INDICATOR (p. 6)  
Appears when the call channel is selected.  
o
!
!
y LOCK INDICATOR (p. 7)  
Appears while the lock function is activated.  
u DUPLEX INDICATOR  
Appears when a duplex channel is selected.  
!
!
i DUALWATCH/TRI-WATCH INDICATORS (p. 10)  
DUALappears during dualwatch; TRIappears during  
tri-watch.  
4
 
2
PANEL DESCRIPTION  
o SUB CHANNEL READOUT  
! TRANSMIT POWER INDICATOR  
Indicates Channel 16 during priority scan.  
Indicates Channel 16 during dualwatch or tri-watch.  
(p. 10)  
• “LOWappears when low power is selected. (p. 8)  
• “LOWblinks when switching forced low power mode be-  
cause of a high temperature error or low voltage.  
• “MID* appears when middle power is selected. (p. 8)  
*Except Germany version.  
Indicates the SET mode item while in SET mode  
! BATTERY INDICATOR  
No indicator appears when high power is selected.  
Indicates remaining battery power.  
Indication  
Charging  
required battery  
No  
Battery level  
Full  
Middle  
! SQUELCH LEVEL INDICATOR (p. 7)  
Shows squelch level when set.  
This indicator can be also used as an S/RF meter when the  
S/RF meter indicator setting is ON. (p. 16)  
! SQUELCH LEVEL ADJUSTING INDICATOR (p. 7)  
Appears while adjusting the squelch level.  
! CHANNEL NUMBER READOUT  
Indicates the selected operating channel number.  
In SET mode, indicates the selected condition.  
! CHANNEL GROUP INDICATOR (p. 6)  
I appears when International; U appears when  
U.S.A. (U.K. and Italian versions only); ATISappears  
when ATIS function is activated (Germany version only).  
5
 
BASIC OPERATION  
3
Channel selection  
DInternational and U.S.A. channels  
DChannel 16  
There are 57 International and 57 U.S.A. channels. These  
Channel 16 is the distress channel. It is used for establishing  
initial contact with another station and for emergency  
communications. Channel 16 is monitored during dualwatch  
or tri-watch. While standing by you are required to monitor  
Channel 16.  
channel groups may be specied for the operating area.  
q Push [DIAL] to select a regular channel.  
w Push [Y]/[Z] switches to select a channel.  
- DUPappears for duplex channels.  
C
e To change the channel group, push [DIAL] for 1 sec.  
- International and U.S.A. channels can be selected in sequence.  
Push  
16  
DCall channel  
Each regular channel group has a separate call channel. The  
call channel is monitored during tri-watch. The call channels  
can be programmed (p. 9) and are used to store your most  
often-used channels in each channel group for quick recall.  
Push [16C] for 1 sec. to select the call channel for the  
selected channel group.  
International channels  
Push for 1 sec.  
DIAL  
- CALLand call channel number  
appear.  
-
Each channel group can have its  
own call channel when programmed.  
U.S.A. channels  
6
 
3
BASIC OPERATION  
Lock function  
Adjusting the squelch level  
The IC-M21 has a squelch even though there is no control  
knob for it. In order to receive signals properly, as well as for  
scan to function, the squelch must be adjusted to a suitable  
level.  
This function electronically locks all keys, except [PTT],  
[SQLMONI] and [H/LLOCK] to prevent accidental channel  
changes and function access.  
Push [H/LLOCK] for 1 sec. to turn the lock function ON and  
OFF.  
- Only [PTT], [H/LLOCK] and [SQLMONI] are functional.  
Appears while the  
lock function is used.  
Appears durling squelch  
level adjustment.  
Each dot indicates the squelch level  
(Level 10: Max. squelch level)  
q Push [SQLMONI], then adjust the squelch level with [Y]/[Z].  
- SQLindicator and squelch level indicator appear.  
- There are 11 squelch levels to choose from: 0 is completely  
open; 10 is the maximum squelch level.  
- When no keys are pushed for 5 sec., the transceiver returns to  
normal condition.  
w Push [SQLMONI] again to return to normal condition.  
7
 
3
BASIC OPERATION  
IMPORTANT: To maximize the readability of your trans-  
mitted signal, pause a few sec. after pushing [PTT], hold  
the microphone 5 to 10 cm (2 to 4 inches) from your  
mouth and speak at a normal voice level.  
Receiving and transmitting  
CAUTION: Transmitting without an antenna may  
damage the transceiver.  
NOTE: The transceiver has a power save function to con-  
serve the battery power and cannot be turned OFF. The  
power save function activates automatically when no sig-  
nal is received for 5 sec.  
q Rotate [OFF/VOL] clockwise to turn power ON.  
- Use the squelch function to mute any audio noise if necessary.  
Refer to the previous page for details.  
w Push* [SQLMONI] for 1 sec., and rotate volume to set  
audio output level.  
*According to Monitor action selection in SET mode (p. 14).  
e Push [Y]/[Z] to select the desired channel.  
- When receiving a signal, BUSYappears and audio is emitted  
from the speaker.  
(The S/RF meter appears while S/RF meter turned ON in SET  
mode.)  
- Further adjustment of [OFF/VOL] may be necessary at this point.  
q Power ON  
w Set volume  
r Push [H/L] to select the output power if necessary.  
- LOWappears when low power is selected; MIDappears when  
middle power is selected; no indicator appears when high power  
is selected.  
t Push to  
transmit  
- Choose low power to conserve battery power, choose high power  
for longer distance communications.  
- Some channels are for low power only.  
y Release to  
w Set squelch  
receive  
level  
t Push and hold [PTT] to transmit, then speak into the  
microphone.  
- TXappears.  
w Set squelch level  
e Set channel  
r Set output  
(The S/RF meter appears while S/RF meter is turned ON in SET  
mode.)  
power  
- Channel 70 cannot be used for transmission (for GMDSS use).  
y Release [PTT] to receive.  
8
 
3
BASIC OPERATION  
Call channel programming  
The call channel switch is used to select Channel 9 by de-  
fault, however, you can program your most often-used chan-  
nels in each channel group for quick recall.  
r Push [Y]/[Z] to select the de-  
sired channel.  
q Push [DIAL] for 1 sec. to select  
the desired channel group (INT,  
USA) to be programmed.  
t Push [16C] to program the dis-  
played channel as the call chan-  
nel.  
- The call channel number and chan-  
nel group stop ashing.  
w Push [16C] for 1 sec. to select  
the call channel of the selected  
channel group.  
- CALLand call channel number  
appear.  
e Push [16C] again for 3 sec.  
(until long beep changes to 2  
short beeps) to enter call chan-  
nel programming condition.  
- Call channel number and channel  
group to be programmed ash.  
Automatic backlighting  
This function is convenient for nighttime operation. The auto-  
matic backlighting can be deactivated in SET mode. (p. 14)  
Push any key except for [PTT] to turn the backlighting ON.  
- The backlighting is automatically turned OFF after 5 sec. of in-  
activity.  
9
 
DUALWATCH/TRI-WATCH  
4
Description  
Dualwatch monitors Channel 16 while you are receiving an-  
other channel; tri-watch monitors Channel 16 and the call  
channel while receiving another channel.  
Operation  
q Select the desired operating channel.  
w Push [DWTRI] momentarily to start dualwatch; push  
[DWTRI] for 1 sec. to start tri-watch.  
- DUAL” flashes during dualwatch; TRI” flashes during tri-watch.  
- Beep tones sound when a signal is received on Channel 16.  
- Tri-watch becomes dualwatch when receiving a signal on the call  
channel.  
DUALWATCH/TRI-WATCH SIMULATION  
Call channel  
e To cancel dualwatch/tri-watch, push [DWTRI] again.  
[Example]: Operating tri-watch on INT Channel 07.  
Push for 1 sec.  
Tri-watch starts.  
TRI  
DW  
Dualwatch  
Tri-watch  
Signal is received  
on call channel.  
If a signal is received on Channel 16, dualwatch/tri-watch pauses  
on Channel 16 until the signal disappears.  
If a signal is received on the call channel during tri-watch, tri-  
watch becomes dualwatch until the signal disappears.  
To transmit on the selected channel during dualwatch/tri-watch,  
push and hold [PTT].  
Signal received on  
Channel 16 takes  
priority.  
Tri-watch resumes  
after the signal  
disappears.  
10  
 
SCAN OPERATION  
5
Scan types  
Scanning is an efcient way to locate signals quickly over a  
wide frequency range. The transceiver has a priority scan and  
a normal scan.  
Set the tag channels (channels to be scanned) before scan-  
ning. Clear the tag channels which inconveniently stop scan-  
ning, such as those used for digital communications.  
NOTE: Choose priority or normal scan in SET mode. (p. 13)  
PRIORITY SCAN  
NORMAL SCAN  
CH 01  
CH 02  
CH 01  
CH 02  
CH 88  
CH 16  
CH 03  
CH88  
CH 03  
CH 05  
CH 04  
CH 05  
CH 04  
Priority scan searches through all tag channels in se-  
quence while monitoring Channel 16. When a signal is de-  
tected on Channel 16, scan pauses until the signal  
disappears; when a signal is detected on a channel other  
than Channel 16, scan becomes dualwatch until the signal  
disappears.  
Normal scan, like priority scan, searches through all tag  
channels in sequence. However, unlike priority scan, Chan-  
nel 16 is not checked unless Channel 16 is set as a tag  
channel.  
11  
 
5
SCAN OPERATION  
Setting tag channels  
Starting a scan  
For more efficient scanning, add desired channels as tag  
channels or clear tag channels for unwanted channels. Chan-  
nels set as non-tag channels will be skipped during scanning.  
Tag channels can be assigned to each channel group (INT,  
USA) independently.  
Set scan type and scan resume timer in advance using SET  
mode. (pgs. 13, 14)  
q Select the desired channel group (INT, USA) by pushing  
[DIAL] for 1 sec., if desired.  
w Push [SCNTAG] to start priority or normal scan.  
- SCANblinks in the function display.  
- 16appears during priority scan.  
q Select the desired channel group (INT, USA) by pushing  
[DIAL] for 1 sec., if desired.  
- When a signal is detected, scan pauses until the signal disap-  
pears or resumes after pausing 5 sec. according to SET mode  
setting. (Channel 16 is still monitored during priority scan.)  
- Push [Y]/[Z] to check tag channels, to change the scanning di-  
rection or resume the scan manually.  
w Select the desired channel to set as a tag channel.  
e Push [SCNTAG] for 1 sec. to set the displayed channel as  
a tag channel.  
- TAGappears in the function display.  
r To cancel the tag channel setting, push [SCNTAG] for 1  
e To stop the scan, push [SCNTAG].  
- SCANdisappears.  
sec.  
- TAGdisappears.  
- Pushing [PTT], [16C], [DIAL] or [DWTRI] also stops the scan.  
Clearing all tag channels in the selected channel group  
While pushing [SCNTAG], turn the power ON to clear all  
tag channels in the channel group.  
Scan pauses when receiving a  
signal and audio is emitted.  
[Example]: Starting a normal scan.  
Scan starts.  
Push  
Push  
TAG  
TAG  
SCN  
SCN  
to stop the scan.  
12  
 
SET MODE  
6
SET mode programming  
SET mode is used to change the conditions of 11 transceiver  
functions: beep tone, scan type, scan resure timer, auto scan,  
monitor action, automatic backlighting, LCD contrast, auto  
power save, self check, battery voltage and S/RF meter.  
SET mode items  
DBeep tone bP”  
You can select silent operation by turning beep tones OFF or  
you can have confirmation beeps sound at the push of a  
switch by turning beep tones ON.  
AUTO (At): Beep tone is linked with volume tone.  
110: Beep tone scale is set from 110 scale (Max. is 10).  
q Turn power OFF.  
w While pushing [SQLMONI], turn power ON and continue  
pushing [SQLMONI] until bPappears.  
e Release [SQLMONI].  
r Push [Y]/[Z] to select the desired condition of the item.  
t Push [SQLMONI] to select the desired item, if necessary.  
y To exit SET mode, turn the power OFF, then ON again, or  
push [16C].  
Beep tone AUTO (default)  
DPriority scan function Pr”  
The transceiver has 2 scan types. Normal scan and priority  
scan. Normal scan searches all tag channels in the selected  
channel group. Priority scan searches all tag channels in se-  
quence while monitoring Channel 16.  
SET MODE CONSTRUCTION  
Battery  
voltage  
S/RF  
meter  
Scan  
type  
Scan resume  
timer  
Beep tone  
Starting item  
Self  
check  
Auto  
scan  
MONI  
SQL  
Push  
Priority scan (default)  
Automatic  
backlighting  
Monitor  
action  
LCD  
contrast  
Auto  
power save  
13  
 
6
SET MODE  
DScan resume timer St”  
DMonitor action selection Sq”  
The scan resume timer can be selected as a pause (OFF) or  
timer scan (ON). When OFF is selected, the scan pauses  
until a received signal disappears. When ON is selected, the  
scan pauses for 5 sec. after receiving a signal and then re-  
sumes even if the signal is still being received.  
The monitor function cuts off the squelch function temporarily.  
This selection contains PUSH or HOLD settings as shown  
below.  
PUSH (Pu): After pushing the [SQLMONI] for 1 sec., the  
squelch function is cut off until [SQLMONI] is  
released. (default)  
HOLD (Ho): After pushing the [SQLMONI] for 1 sec., the  
squelch function is cut off continuously until  
another key is pushed.  
Scan timer OFF (default)  
DAuto scan function AS”  
Monitor switch PUSH (default)  
While in standby, this function automatically starts the desired  
scan (normal or priority scan) 30 sec. after operation.  
Scan indicator blinks while scanning.  
DAutomatic backlighting bL”  
This function is convenient for nighttime operation. The auto-  
matic backlighting turns the backlighting ON when pushing  
any key except for [PTT].  
The backlighting is automatically turned OFF after 5 sec. of inactivity.  
Auto scan OFF (default)  
Automatic backlighting ON (default)  
14  
 
6
SET MODE  
DLCD contrast selection LC”  
The contrast of the LCD can be adjusted from 4 levels.  
1 (low contrast) 4 (high contrast); 3 (default)  
DSelf check function SC”  
The self check function checks transceiver conditions by it-  
self, and informs you in case a problem is found. The follow-  
ing items are checked after the power is turned ON, then it  
switches to operation mode.  
Temperature (Outside of 15°C to +55°C)  
Connected battery voltage  
Water intrusion  
LCD contrast (default)  
DAuto power save function PS”  
The power save function reduces current drain by deactivat-  
ing the receiver circuit for preset intervals.  
Self check OFF (default)  
When error messages as shown below are displayed, see  
trouble shooting for advice (p. 23).  
Error messages  
Auto power save ON (default)  
Temperature error Battery voltage error Water intrusion error  
15  
 
6
SET MODE  
DBattery voltage indicator bt”  
This function contains display or non-display settings of the  
SET MODE LIST  
Indication  
voltage of the connected battery pack when the power is ON.  
The voltage of the connected battery pack is displayed for 2 sec.  
after power is turned ON.  
Function  
Switch  
Beep tone  
"bP"  
OFF / Auto* / 1 10  
OFF / ON*  
OFF* / ON  
OFF* / ON  
Push* / Hold  
ON* / OFF  
3* / 1 4  
Scan type selection  
Scan resume timer  
"Pr"  
"St"  
Auto scan function  
"AS"  
"Sq"  
"bL"  
"LC"  
"PS"  
"SC"  
"bt"  
Battery voltage OFF (default)  
Monitor switch selection  
Automatic backlighting  
LCD contrast selection  
Auto power save function  
Self check function  
DS-meter/RF meter indicator Sr”  
This function contains display or non-display setting of the  
S-meter/RF meter.  
ON* / OFF  
OFF* / ON  
OFF* / ON  
Battery voltage indicator  
S-meter/RF meter indicator  
S-meter/RF meter OFF (default)  
"Sr"  
OFF* / ON  
*default setting  
16  
 
BATTERY CHARGING  
7
Battery charging  
Prior to using the transceiver for the rst time, the Ni-Cd bat-  
Battery cautions  
NEVER incinerate used Ni-Cd batteries. Internal battery gas  
teries must be fully charged for optimum life and operation.  
may cause an explosion.  
CAUTION: To avoid damage to the transceiver, turn it OFF  
NEVER immerse batteries in water. If the battery case be-  
comes wet, be sure to wipe it dry BEFORE attaching it to the  
transceiver.  
while charging.  
Recommended temperature range for charging:  
+10°C to +40°C (+50°F to +104°F)  
Use the supplied charger (BC-150) only. NEVER use an  
other manufactures charger.  
NEVER short terminals of the battery case. Also, current may  
ow into nearby metal objects so be careful when placing bat-  
tery cases in handbags, etc.  
NEVER connect DC power to the battery case when in-  
stalling alkaline batteries. Such a connection will damage  
the transceiver.  
If your Ni-Cd batteries seem to have no capacity even after  
being charged, completely discharge them by leaving the  
power ON overnight. Then, fully charge the Ni-Cd batteries  
again. If the batteries still do not retain a charge (or very little),  
new batteries must be purchased.  
17  
 
7
BATTERY CHARGING  
ï Charging connections  
Installing batteries in the  
q Attach the BC-150 to a at surface, such as desk or cabin, etc., if  
desired.  
w Connect the AC adapter (BC-147E) as shown below.  
e Insert the battery pack with/without the transceiver into the  
charger.  
battery case  
(Not supplied with some versions)  
When using a battery case attached to the transceiver, install  
6 × AA(R6) size alkaline batteries as illustrated below.  
The charge indicator lights green.  
r Charge the battery pack approx. 8 hours, depending on the re-  
maining power condition.  
q Remove the battery case from the transceiver.  
w Install 6 × AA(R6) size alkaline batteries.  
Be sure to observe the correct polarity.  
CAUTION: DO NOT charge BP-224 more than 12 hours.  
Otherwise, BP-224 will be damaged. BP-224 must  
be charged for 812 hours only.  
CAUTION:  
When installing batteries, make sure they are all the  
same brand, type and capacity. Also, do not mix new and  
old batteries together.  
Keep battery contacts clean. Its a good idea to clean bat-  
tery terminals once a week.  
IC-M21  
BP-224  
Charge indicator  
Lights green when  
BP-224 (with/without  
IC-M21) is inserted.  
Supplied screws  
AC adapter  
(BC-147E; Not  
supplied with  
BC-150  
some versions)  
18  
 
7
BATTERY CHARGING  
Optional battery chargers  
DRapid charging with the BC-119N+AD-103  
The optional BC-119N provides rapid charging of battery  
packs. The following are additionally required.  
AD-103  
DRapid charging with the BC-121N+AD-103  
The optional BC-121N allows up to 6 battery packs to be  
charged simultaneously. The following are additionally re-  
quired.  
An AC adapter (may be supplied with BC-119N depending  
on version).  
Six AD-103.  
An AC adapter (BC-124) or the DC power cable (OPC-656).  
IC-M21  
BP-224  
IC-M21  
BP-224  
AD-103 charger  
adapters are installed  
in each slot.  
(purchased  
AC adapter  
OPC-515L or  
CP-17L  
separately)  
AD-103 charger  
adapter is installed  
in BC-119N.  
AC adapter  
(BC-145E)  
DC power cable  
(Connect with the DC power supply;  
13.8 V/at least 7 A)  
19  
 
SUPPLIED ACCESSORIES AND ATTACHMENTS  
8
DSupplied accessories  
The following accessories are supplied:  
DFlexible antenna  
Qty. Connect the supplied exible  
antenna to the antenna con-  
q Flexible antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 nector.  
w Swivel belt clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
e Handstrap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
r Battery case (BP-223)* . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
t Ni-Cd battery pack (BP-224) . . . . . . . . . . . . . . . . . . . . . . .1  
y AC adapter (BC-147E)* . . . . . . . . . . . . . . . . . . . . . . . . . .1  
u Battery charger (BC-150) . . . . . . . . . . . . . . . . . . . . . . . . .1  
i Screws for the BC-150 (M3.5 × 20) . . . . . . . . . . . . . . . . .2  
* Not supplied with some versions.  
CAUTION: Transmitting  
without an antenna may  
damage the transceiver.  
DHandstrap  
Slide the handstrap through  
the loop on the side of the  
transceiver as illustrated at  
right. Facilitates carrying.  
20  
 
8
SUPPLIED ACCESSORIES AND ATTACHMENTS  
DSwivel belt clip  
To attach:  
q Slide the stopper into the plastic loop on the back of the  
e Insert the stopper to the back of the belt clip.  
transceiver.  
w Clip the belt clip to a part of your belt.  
Once the transceiver is locked in place, it will swivel 360 de-  
grees.  
21  
 
8
SUPPLIED ACCESSORIES AND ATTACHMENTS  
To remove:  
q Turn the transceiver upside down, and then lift to release  
the transceiver from the belt clip.  
R
CAUTION!  
HOLD THE TRANSCEIVER TIGHTLY, WHEN ATTACH-  
ING OR REMOVING THE TRANSCEIVER FROM THE  
BELT CLIP.  
If the transceiver is accidentally dropped and the swivel  
belt clips stopper is scratched or damaged, the swivel  
belt clip may not work properly.  
w Release the belt clip.  
e Push the top of the stopper towards the transceiver and out  
at the same time, then push it downwards and free of the  
plastic loop.  
22  
 
TROUBLESHOOTING  
9
PROBLEM  
POSSIBLE CAUSE  
The battery is exhausted.  
SOLUTION.  
REF.  
p. 17  
Recharge the battery pack.  
No power comes ON.  
Bad connection to the battery pack.  
Check the connection to the transceiver.  
p. 3  
Squelch level is too deep.  
Volume level is too low.  
Speaker has been exposed to water.  
Set squelch to the threshold point.  
Set [OFF/VOL] to a suitable level.  
Drain water from the speaker.  
No sound comes from  
the speaker.  
p. 7  
p. 8  
Transmitting is impossi- Some channels are for low power or re- Change channels.  
pgs. 2, 4  
ble, or high power can ceive only.  
not be selected.  
The battery is exhausted.  
The output power is set to low.  
Recharge the battery pack.  
Push [H/L] to select high power.  
p. 17  
p. 2  
The display channel Lock function is activated.  
Push [H/LLOCK] for 1 sec. to cancel the p. 2  
cannot be changed.  
function.  
Scan does not start.  
No beeps sound.  
• “TAGchannels are not programmed.  
Beep tones are turned OFF.  
Set the desired channels as TAGchannels. p. 12  
Set the beep tones to AUTO or 110 in SET p. 13  
mode.  
Self check error.  
Transceivers inside temperature is below Leave the transceiver at room temperature  
(Temperature error)  
20°C (4°F) or above +60°C (+120°F).  
for a while. Turn the power ON to check if the  
internal temperature has returned to normal.  
Self check error.  
(Battery voltage error)  
The connected battery packs voltage is Verify the battery voltage is correct.  
more than 11 V.  
Self check error.  
(Water intrusion error)  
Water has entered the transceiver.  
Have the transceiver checked at your local  
distributor or dealer to see whether the trans-  
ceiver works properly or not.  
23  
 
10  
CHANNEL LIST  
International channels  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
Transmit Receive  
Frequency (MHz)  
Frequency (MHz)  
Transmit Receive  
CH  
CH  
CH  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01 156.050 160.650  
02 156.100 160.700  
03 156.150 160.750  
04 156.200 160.800  
11 156.550 156.550  
12 156.600 156.600  
13 156.650 156.650  
14 156.700 156.700  
21 157.050 161.650  
22 157.100 161.700  
23 157.150 161.750  
24 157.200 161.800  
25 157.250 161.850  
26 157.300 161.900  
27 157.350 161.950  
28 157.400 162.000  
60 156.025 160.625  
61 156.075 160.675  
62 156.125 160.725  
63 156.175 160.775  
64 156.225 160.825  
72 156.625 156.625  
73 156.675 156.675  
74 156.725 156.725  
82 157.125 161.725  
83 157.175 161.775  
84 157.225 161.825  
85 157.275 161.875  
86 157.325 161.925  
87 157.375 157.375  
88 157.425 157.425  
65 156.275 160.875 75 156.775 156.775  
66 156.325 160.925 76 156.825 156.825  
05 156.250 160.850 15 156.750 156.750  
06 156.300 156.300 16 156.800 156.800  
07 156.350 160.950 17 156.850 156.850  
67 156.375 156.375  
68 156.425 156.425  
69 156.475 156.475  
77 156.875 156.875  
78 156.925 161.525  
79 156.975 161.575  
80 157.025 161.625  
81 157.075 161.675  
08 156.400 156.400  
09 156.450 156.450  
10 156.500 156.500  
18 156.900 161.500  
19 156.950 161.550  
20 157.000 161.600  
Rx only  
70  
156.525  
71 156.575 156.575  
USA channels (for U.K. version only)  
Frequency (MHz)  
Frequency (MHz)  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
Frequency (MHz)  
CH  
CH  
CH  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
Transmit Receive  
01A 156.050 156.050  
-- - - - - - -  
03A 156.150 156.150  
-- - - - - - -  
05A 156.250 156.250  
12 156.600 156.600 22A 157.100 157.100 64A 156.225 156.225  
77 156.875 156.875  
86 157.325 161.925  
13 156.650 156.650 23A 157.150 157.150 65A 156.275 156.275 78A 156.925 156.925 86A 157.325 157.325  
14 156.700 156.700  
15 156.750 156.750  
16 156.800 156.800  
24 157.200 161.800 66A 156.325 156.325 79A 156.975 156.975  
87 157.375 161.975  
25 157.250 161.850 67 156.375 156.375 80A 157.025 157.025 87A 157.375 157.375  
26 157.300 161.900  
27 157.350 161.950  
28 157.400 162.000  
68 156.425 156.425 81A 157.075 157.075  
69 156.475 156.475 82A 157.125 157.125 88A 157.425 157.425  
Rx only  
71 156.575 156.575  
72 156.625 156.625 84A 157.225 157.225  
73 156.675 156.675 85 157.275 161.875  
74 156.725 156.725 85A 157.275 157.275  
88 157.425 162.025  
06 156.300 156.300 17 156.850 156.850  
07A 156.350 156.350 18A 156.900 156.900  
70  
156.525 83A 157.175 157.175  
84 157.225 161.825  
08 156.400 156.400 19A 156.950 156.950 37A 157.850 157.850  
09 156.450 156.450 20 157.000 161.600 61A 156.075 156.075  
10 156.500 156.500 20A 157.000 157.000 -- - - - - - -  
11 156.550 156.550 21A 157.050 157.050 63A 156.175 156.175  
Low power only.  
24  
 
SPECIFICATIONS AND OPTIONS  
11  
Specications  
Options  
GENERAL  
DBATTERY CASE AND PACK  
Frequency coverage  
: Transmit 156.000161.450 MHz  
BP-223 BATTERY CASE  
Receive 156.000163.425 MHz  
: FM (16K0G3E)  
Battery case for 6 × AA (R6) alkaline cells. The same as supplied  
with the transceiver depending on versions.  
BP-224 Ni-Cd BATTERY PACK  
7.2 V/750 mAh Ni-Cd battery pack. The same as supplied with the  
transceiver depending on versions.  
Mode  
Channel spacing  
: 25 kHz  
Current drain (at 7.5 V DC) : TX High (5 W)  
1.5 A typical  
0.7 A typical  
200 mA typical  
20 mA typical  
(1 W)  
Max. audio  
Power save  
Frequency stability  
Operating temperature range : 15°C to +55°C  
Dimensions  
(Projections not included)  
:
1.5 kHz (15°C to +55°C)  
DCHARGERS  
BC-119N DESKTOP CHARGER + AD-103 CHARGER ADAPTER  
+ BC-145 AC ADAPTER  
: 61 (W) × 135(H) × 41(D) mm  
21332(W) × 5516(H) × 158(D) inch  
For rapid charging of battery packs. An AC adapter is supplied with  
the charger. Charging time: approx. 1.5 to 2 hours  
BC-121N MULTI-CHARGER + AD-103 CHARGER ADAPTER (6 pcs.)  
+ BC-124 AC ADAPTER  
For rapid charging of up to 6 battery packs (six AD-103s are re-  
quired) simultaneously. An AC adapter may be supplied depending  
on version. Charging time: approx. 1.5 to 2 hours.  
BC-150 DESKTOP CHARGER + BC-147E AC ADAPTER  
Used for regular charging of battery pack. The same as supplied  
with the transceiver. Charging time: approx. 8 hours  
Weight (approx.; with BP-224) : 360g (12.7 oz)  
TRANSMITTER  
Output power (at 7.5 V DC) : 5 W (Hi), 3 W (Mid), 1 W (Low) or  
1 W (Hi), 0.5 W (Low) <(#07)FRG>  
Modulation system  
Max. frequency deviation  
:
:
Variable reactance frequency modulation  
5 kHz  
Audio harmonics distortion : Less than 10 % (at 60 % mod.)  
Spurious emissions  
: Less than 0.25 µW  
RECEIVER  
Receive system  
Sensitivity (20 dB SINAD)  
Squelch sensitivity (at threshold): Less than 0 dBµ EMF (typical)  
Intermodulation rejection ratio : 68 dB  
Spurious response rejection ratio : 70 dB  
Adjacent channel selectivity : 70 dB  
Hum and noise ratio  
Audio output power  
: Double-conversion superheterodyne  
: Less than 2 dBµ EMF (typical)  
DBELT CLIPS  
MB-68 BELT CLIP  
Universal belt clip for attaching to your belt.  
MB-74 BELT CLIP  
Exclusive alligator-type belt clip.  
MB-87 SWIVEL BELT CLIP  
: More than 40 dB  
: 0.2 W typical at 10% distortion with an  
8 load  
Belt clip for swivel type. The same as supplied with the transceiver.  
All stated specications are subject to change without notice or obligation.  
25  
 
DECLARATION  
OF CONFORMITY  
We Icom Inc. Japan  
1-1-32 Kamiminami, Hirano-ku,  
Osaka 547-0003 Japan  
0560  
Place and date of issue  
Declare on our sole responsibility that this equipment complies with the  
essential requirements of the Radio and Telecommunications Terminal  
Equipment Directive, 1999/5/EC, and that any applicable Essential Test  
Suite measurements have been performed.  
Kind of equipment: VHF MARINE TRANSCEIVER  
Type-designation: iC-m21  
Version (where applicable):  
Authorized representative name  
This compliance is based on conformity with the following harmonised  
standards, specifications or documents:  
T. Maebayashi  
General Manager  
i)  
EN 301 178-2  
V1.1.1 (2000-08)  
1997  
ii) EN 60945  
iii) EN 60950  
1992  
iv) EN 300 698-2  
V1.1.1 ( 2000-8)  
v)  
vi)  
Signature  
 
Count on us!  
< Intended Country of Use >  
GER  
NED  
GRE  
IRL  
ITA  
AUT  
LUX  
DEN  
SUI  
BEL  
SWE  
FRA  
GBR  
ESP  
FIN  
POR  
A-6117H-1EU  
Printed in Japan  
© 2001 Icom Inc.  
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0002 Japan  
 

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