Icom IC-M502A User manual

INSTRUCTION MANUAL
iM502A
VHF MARINE TRANSCEIVER

FOREWORD
Thank you for purchasing this Icom product. The IC-
M502A V HF MARINE TRANSCEIVER is designed and built
with Icom’s state of the art technology and craftsman-
ship. With proper care, this product should provide you
with years of trouble-free operation.
We want to take a couple of moments of your time to
thank you for making the IC-M502A your radio of
choice, and hope you agree with Icom’s philosophy of
“technology first.” Many hours of research and devel-
opment went into the design of your IC-M502A.
D FEATURES
❍Standard 4 ″× 6 ″ flush mount design
❍Built-in DSC meets RTCM SC101 require-
ment
❍Rugged waterproof construction
❍NMEA Input/Output
❍Optional COMMANDMIC®is connectable
Icom, Icom Inc. and the logo are registered trademarks
of Icom Incorporated (Japan) in the United states, the United
Kingdom, Germany, France, Spain, Russia and/or other coun-
tries. COMMANDMIC is a registered trademark of Icom
Incorporated (Japan) in the United states.
IMPORTANT
READ THIS INSTRUCTION MANUAL
CAREFULLY before attempting to operate the trans-
ceiver.
SAVE THIS INSTRUCTION MANUAL. This
manual contains important safety and operating in-
structions for the IC-M502A.
CLEAN THE TRANSCEIVER AND MICROPHONE
THOROUGHLY WITH FRESH WATER after exposure to
water including salt water, otherwise, the keys and
switches may become inoperable due to salt crystallization.
i

ii
IN CASE OF EMERGENCY
If your vessel requires assistance, contact other vessels and
the Coast Guard by sending a distress call on Ch 16.
Or, transmit your distress call using digital selective calling on
Ch 70.
USING CHANNEL 16
DISTRESS CALL PROCEDURE
1. “MAYDAY MAYDAY MAYDAY.”
2. “THIS IS ...............” (name of vessel)
3. Your call sign or other indication of the vessel (AND 9-
digit DSC ID if you have one).
4. “LOCATED AT ...............” (your position)
5. The nature of the distress and assistance required.
6. Any other information which might facilitate the rescue.
USING DIGITAL SELECTIVE CALLING (Ch 70)
DISTRESS CALL PROCEDURE
1. While lifting up the switch cover, push and hold
[
[DISTRESS
DISTRESS]
]for 5 sec. until you hear 5 short beeps
change to one long beep.
2. Wait for an acknowledgment from a coast station.
• Channel 16 is automatically selected.
3. Push and hold [ [PTT
PTT]
], then transmit the appropriate
information as at above.
NOTE
A WARNING STICKER is supplied with the transceiver.
To comply with FCC regulations, this sticker must be affixed in
such a location as to be readily seen from the operating con-
trols of the radio as in the diagram below. Make sure the cho-
sen location is clean and dry before applying the sticker. (p. 42)
EXAMPLE

iii
Icom requires the radio operator to meet the
FCC Requirements for Radio Frequency Expo-
sure. An omnidirectional antenna with gain not
greater than 9 dBi must be mounted a minimum
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 esti-
mated to meet all RF exposure compliance requirements. This
5 meter distance is based on the FCC Safe Maximum Per-
missible 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 vertically
between the antenna, (measured from the lowest point of the
antenna), to the heads of all persons AND all persons must
stay outside of the 3 meter MPE radius.
Do not transmit with radio and antenna when persons are
within the MPE radius of the antenna, unless such persons
(such as driver or radio operator) are shielded from antenna
field by a grounded metallic barrier. The MPE Radius is the
minimum distance from the antenna axis that person should
maintain in order to avoid RF exposure higher than the allow-
able MPE level set by FCC.
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.
RADIO OPERATOR WARNING
WARNING

FOREWORD ............................................. i
IMPORTANT .............................................. i
IN CASE OF EMERGENCY ...................... ii
NOTE ........................................................ ii
RADIO OPERATOR WARNING ............... iii
TABLE OF CONTENTS ........................... iv
PRECAUTION .......................................... v
EXPLICIT DEFINITIONS .......................... v
1 OPERATING RULES .................. 1
2 PANEL DESCRIPTION........... 2 – 5
■Front panel ..................................... 2
■Function display .............................. 4
■Microphone...................................... 5
3 BASIC OPERATION ............ 6 – 10
■Channel selection ........................... 6
■Receiving and transmitting ............. 8
■Call channel programming .............. 9
■Channel comments ......................... 9
■ Optional Voice scrambler operation .. 10
4
DUALWATCH/TRI-WATCH ......... 11
■Description .................................... 11
■Operation ...................................... 11
5 SCAN OPERATION ........... 12 – 13
■Scan types .................................... 12
■Setting tag channels ..................... 13
■Starting a scan .............................. 13
6 DSC OPERATION .............. 14 – 35
■MMSI code programming ............. 14
■DSC individual ID ......................... 14
■Position and Time programming ... 16
■Position/Time indication ................ 17
■Distress call .................................. 18
■Transmitting DSC calls ................. 21
■Receiving DSC calls ..................... 29
■Received messages ..................... 32
■DSC Set mode .............................. 34
7 OTHER FUNCTIONS .......... 36–37
■Intercom operation ........................ 36
■Microphone lock function .............. 37
8 SET MODE ........................ 38 – 41
■Set mode programming ................ 38
■Set mode items ............................. 39
9 CONNECTIONS AND
MAINTENANCE ................. 42 – 47
■Supplied accessories .................... 42
■Antenna ........................................ 42
■Fuse replacement ......................... 42
■Cleaning ....................................... 42
■Connections .................................. 43
■Mounting the transceiver .............. 44
■Optional unit installation ............... 46
■Dimensions ................................... 47
10 TROUBLESHOOTING .............. 48
11 CHANNEL LIST ........................ 49
12 SPECIFICATIONS AND
OPTIONS ........................... 50 – 51
■Specifications ............................... 50
■Options ......................................... 51
13 HM-127 REMOTE-CONTROL
MICROPHONE ................... 52 – 66
■Panel description .......................... 52
■Function display ............................ 54
■Channel selection ......................... 56
■Receiving and transmitting ........... 57
■Lock functions ............................... 58
■Display backlighting ...................... 58
■Monitor function ............................ 59
■RF attenuator function .................. 59
■Call channel programming ............ 59
■ Optional Voice scrambler operation .. 60
■Dualwatch/Tri-watch operation ..... 60
■Starting a scan .............................. 61
■Setting tag channels ..................... 61
■Set mode programming ................ 62
■Intercom operation ........................ 63
■Channel comments ....................... 63
■HM-127 supplied accessories ...... 64
■Installation .................................... 65
TEMPLATE
iv
TABLE OF CONTENTS 1
2
3
4
5
6
7
8
9
10
11
12
13

v
RWARNING! NEVER connect the transceiver to an AC
outlet. This may pose a fire hazard or result in an electric
shock.
CAUTION: Changes or modifications to this device, not ex-
pressly approved by Icom Inc., could void your authority to
operate this device under FCC regulations.
NEVER connect the transceiver to a power source of more
than 16 V DC or use reverse polarity. This will ruin the trans-
ceiver.
NEVER cut the DC power cable between the DC plug and
fuse holder. If an incorrect connection is made after cutting,
the transceiver may be damaged.
NEVER place the transceiver where normal operation of the
vessel may be hindered or where it could cause bodily injury.
KEEP the transceiver at least 3.3 ft (1 m) away from the
ship’s navigation compass.
DO NOT use or place the transceiver in areas with temper-
atures below –4°F (–20°C) or above +140°F (+60°C) or, in
areas subject to direct sunlight, such as the dashboard.
AVOID the use of chemical agents such as benzine or al-
cohol when cleaning, as they may damage the transceiver
surfaces.
BE CAREFUL! The transceiver rear panel will become
hot when operating continuously for long periods.
Place the transceiver in a secure place to avoid inadvertent
use by children.
BE CAREFUL! The transceiver and optional HM-127 em-
ploy waterproof construction, which corresponds to JIS wa-
terproof specification, Grade 7 (1 m/30 min.). However, once
the transceiver or microphone has been dropped, water-
proofing cannot be guaranteed due to the fact that the case
may be cracked, or the waterproof seal damaged, etc.
EXPLICIT DEFINITIONS
WORD DEFINITION
RRWARNING Personal injury, fire hazard or electric
shock may occur.
CAUTION Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No
risk or personal injury, fire or electric
shock.
PRECAUTION

1
1
OPERATING RULES
DDPRIORITIES
•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.
•You must monitor Channel 16 when you are not operating
on another channel.
• False or fraudulent distress signals are prohibited and pun-
ishable by law.
DDPRIVACY
• Information overheard but not intended for you cannot law-
fully be used in any way.
• Indecent or profane language is prohibited.
DDRADIO LICENSES
(1) SHIP STATION LICENSE
You must have a current radio station license before using the
transceiver. It is unlawful to operate a ship station which is not
licensed.
Inquire through your dealer or the appropriate government
agency for a Ship-Radiotelephone license application. This
government-issued license states the call sign which is your
craft’s identification for radio purposes.
(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.
The Restricted Radiotelephone Operator Permit must be
posted or kept with the operator. Only a licensed radio opera-
tor 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.
Keep a copy of the current government rules and regulations
handy.
Radio license for boaters (U.S.A. only)
The Telecommunications Act of 1996 permits recreational
boaters to have and use a VHF marine radio, EPIRB, and
marine radar without having an FCC ship station license.
Boaters traveling on international voyages, having an HF
single sideband radiotelephone or marine satellite terminal,
or required to carry a marine radio under any other regula-
tion must still carry an FCC ship station license. For further
information, see the FCC Ship Radio Stations Fact Sheet.
1

PANEL DESCRIPTION
2
2
■Front panel
WATERPROOF
SCAN
TAG
DSC/ENT
POS
HI/LO
POWER
VOL
iM502
VHF MARINE
SQL
LO/DX
IC SCR
CH/WX
DW U/I/C 916
DISTRESS
Speaker
Function
display
qwe r t y u
io!0!1
qVOLUME CONTROL [ [VOL
VOL]
](p. 8)
Adjusts the audio level.
wPOWER KEY [ [POWER
POWER]
]
Push to turn the transceiver power ON or OFF.
eSQUELCH CONTROL [ [SQL
SQL]
](p. 8)
Sets the squelch threshold level.
rTRANSMIT POWER KEY [ [HI/LO
HI/LO]
]
➥Toggles power high or low when pushed. (p. 8)
• Some channels are set to low power only.
➥While pushing this key, some keys perform secondary
functions.
tCHANNEL SELECTOR [ [CHANNEL
CHANNEL]
]
➥Rotate [ [CHANNEL
CHANNEL]
]to select the operating channels,
Set mode settings, etc. (pgs. 8, 38)
➥While pushing [ [HI/LO
HI/LO]
], rotate [ [CHANNEL
CHANNEL]
]to adjust
the brightness of the LCD and key backlight. (p. 37)

yATTENUATOR/INTERCOM/SCRAMBLER KEY
[
[LO/DX
LO/DX]
](
(SCR) SCR)
➥Toggles the Attenuator function ON or OFF when
pushed momentarily. (p. 8)
•“LOCAL” appears when the Attenuator is in use. The order of
indication precedence is “SP OFF,” “LOCAL” and “CALL.”
➥Activates an optional Intercom function when pushed for
1 sec. (p. 36)
➥Calls optional HM-127 REMOTE-CONTROL MICROPHONE
when pushed and held while in Intercom mode. (p. 36)
➥While pushing [ [HI/LO
HI/LO]
], activates an optional Voice
scrambler function. (p. 10)
•The optional Voice scrambler function cannot be used on
Channel 16 and 70.
uCHANNEL 16/CALL CHANNEL KEY [ [9
9]
]
➥Selects Channel 16 when pushed. (p. 6)
➥Selects call channel when pushed for 1 sec. (p. 6)
•“CALL” appears when call channel is selected. “SP OFF”
and “LOCAL” indications have priority.
➥Push for 3 sec. to enter call channel programming con-
dition when call channel is selected. (p. 9)
➥While pushing [ [HI/LO
HI/LO]
], enters channel comments pro-
gramming condition. (p. 9)
➥Enters Set mode when pushed while turning power ON.
(p. 38)
iDISTRESS KEY [ [DISTRESS
DISTRESS]
]
Transmits Distress call when pushed for 5 sec. (p. 18)
oCHANNEL/DUALWATCH/TRI-WATCH KEY
[
[CH/WX
CH/WX]
](
(U/I/C) U/I/C)
➥Selects and toggles the regular channels and weather
channel when pushed momentarily. (p. 7)
➥While pushing [ [HI/LO
HI/LO]
], selects one of 3 regular chan-
nels in sequence when pushed. (p. 7)
•International, U.S.A. and Canadian channels are available for
regular channels.
➥Starts Dualwatch or Tri-watch when pushed for 1 sec.
(p. 11)
➥Stops Dualwatch or Tri-watch when either is activated.
!0 SCAN KEY [ [SCAN
SCAN]
](
() )(p. 13)
➥Starts and stops Normal or Priority scan when tag
(scanned) channels are programmed.
➥Push [ [SCAN
SCAN]
](
() )for 1 sec. to set or cancel the dis-
played channel as a tag (scanned) channel.
➥While pushing [ [HI/LO
HI/LO]
], push for 3 sec. to clear or set
all tag channels.
!1 DSC/POSITION KEY [ [DSC/ENT
DSC/ENT]
](
() )
➥Selects the DSC menu when pushed. (p. 14)
➥Shows current position and time from a GPS receiver,
etc. when pushed for 1 sec. (p. 17)
POS
TAG
TAG
DW
16
16
IC
PANEL DESCRIPTION
3
2
2

■Function display
qBUSY/TRANSMIT INDICATOR (p. 8)
➥“BUSY” appears when receiving a signal or when the
squelch opens.
➥“TX” appears while transmitting.
wPOWER INDICATOR (p. 8)
➥“25W” appears when high power is selected.
➥“1W” appears when low power is selected.
eTAG CHANNEL INDICATOR (p. 13)
Appears when a tag channel is selected.
rCHANNEL COMMENT INDICATOR
➥Channel comment appears if programmed. (p. 9)
➥“Low Battery” blinks when the battery voltage
drops to approx. 10 V DC or below.
➥“DUAL” appears during Dualwatch; “TRI” appears dur-
ing Tri-watch. (p. 11)
tSCRAMBLER INDICATOR (p. 10)
Appears when an optional Voice scrambler is activated.
INT
CALL
BUSY
25W
TAG SC DUP
CALLING
w
q
e
r
tuy
io
PANEL DESCRIPTION
4
2

5
2
PANEL DESCRIPTION
yDUPLEX INDICATOR (p. 7)
Appears when a duplex channel is selected.
• Duplex channel has a different TX and RX frequency.
uCHANNEL NUMBER READOUT
➥Indicates the selected operating channel number.
“A” appears when a simplex channel is selected. “b” ap-
pears when a receive only channel for a Canadian chan-
nel group is selected. (p. 7)
➥In Set mode, indicates the selected condition. (p. 38)
iCHANNEL GROUP INDICATOR (p. 7)
Indicates whether an International “INT,” U.S.A. “USA,”
Canadian “CAN” or weather “WEATHER” channel is se-
lected.
oCALL CHANNEL INDICATOR
➥“CALL” appears when call channel is selected. (p. 6)
➥“SP OFF” appears when the internal speaker is turned
OFF in Set mode. (p. 40)
➥“LOCAL” appears when the Attenuator is in use. (p. 8)
•The order of indication precedence is “SP OFF,” “LOCAL”
and “CALL.”
■Microphone
qPTT SWITCH [ [PTT
PTT]
](p. 8)
Push and hold to transmit; release to receive.
wCHANNEL UP/DOWN KEYS [ [YY
YY]
]/[ [ZZ
ZZ]
](pgs. 8, 38)
Push either key to change the operating channel, Set
mode settings, etc.
eCHANNEL 16/CALL CHANNEL KEY [ [16/9
16/9]
]
➥Push to select Channel 16; push for 1 sec. to select call
channel (default is Channel 9). (p. 6)
➥While pushing [ [16/9
16/9]
], turn power ON to toggle the Lock
function ON or OFF. (p. 37)
Speaker
Microphone
w
q
e
2

6
3BASIC OPERATION
■Channel selection
DDChannel 16
Channel 16 is the distress and safety channel. It is used for
establishing initial contact with another station and for emer-
gency communications. Channel 16 is monitored during both
Dualwatch and Tri-watch. While standing by, you must moni-
tor Channel 16.
➥Push [ [9
9]
]momentarily to select Channel 16.
➥Push [ [CH/WX
CH/WX]
]to return to the condition before selecting
Channel 16, or rotate [ [CHANNEL
CHANNEL]
]to select an operating
channel.
DDChannel 9 (Call channel)
Each regular channel group has a separate leisure-use call
channel. Call channel is monitored during Tri-watch. 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 [ [9
9]
]for 1 sec. to select call channel of the selected
channel group.
•“CALL” and call channel number appear.
• Each channel group may have an independent call channel after
programming a call channel.
➥Push [ [CH/WX
CH/WX]
]to return to the condition before selecting
call channel,or rotate [
[CHANNEL
CHANNEL]
]to select an operating
channel.
Convenient: Using microphone
➥Push [ [16/9
16/9]
]momentarily to select Channel 16.
➥Push [ [16/9
16/9]
]for 1 sec. to select call channel.
➥Push [ [YY
YY]
]/[ [ZZ
ZZ]
]to select any other operating channel.
Push for
1 sec.
INT
25W CALL
TAG
CALLING
916
16
16
INT
25W
TAG
CALLING
Push 916
16
16

3
BASIC OPERATION
7
DDU.S.A., Canadian and International channels
There are 57 U.S.A., 61 Canadian and 57 International chan-
nels. These channel groups may be specified for the operat-
ing area.
qPush [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) to select a regular channel.
• If a weather channel appears, push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) again.
wWhile pushing [ [HI/LO
HI/LO]
], push [ [CH/WX
CH/WX]
]( (U/I/C) U/I/C) to
change the channel group, if necessary.
•U.S.A., International (INT) and Canadian channels can be se-
lected in sequence.
eRotate [ [CHANNEL
CHANNEL]
]to select a channel.
•“DUP” appears for duplex channels.
•“A” appears when a simplex channel is selected. “b” appears
when a receive only channel for a Canadian channel group is se-
lected.
DDWeather channels
There are 10 weather channels. Used for monitoring weather
channels from the NOAA (National Oceanographic and At-
mospheric Administration) broadcasts.
The transceiver can detect a Weather alert tone on the se-
lected weather channel while receiving that channel, during
standby on a regular channel or while scanning. See
“Weather alert” on p. 39.
qPush [ [CH/WX
CH/WX]
]once or twice to select a weather channel.
•“WEATHER” appears when a weather channel is selected.
• “WX ALT” appears when the Weather alert function is in use.
(p. 39)
wRotate [ [CHANNEL
CHANNEL]
]to select a channel.
Push once
or twice When Weather alert is OFF.
WEATHER
When Weather alert is ON.
WXALT
CH/WX
DW U/I/C
Push +
U.S.A. channels
HI/LO CH/WX
DW U/I/C
Canadian channels
CAN
International channels
INT
DUP
USA
DW
DW
DW
3

■Receiving and transmitting
CAUTION: Transmitting without an antenna may dam-
age the transceiver.
qPush [ [POWER
POWER]
]to turn power ON.
wSet the audio and squelch levels.
➥Rotate [ [SQL
SQL]
]fully counterclockwise in advance.
➥Rotate [ [VOL
VOL]
]to adjust the audio output level.
➥Rotate [ [SQL
SQL]
]clockwise until the noise disappears.
eTo change the channel group, push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C)
while pushing [ [HI/LO
HI/LO]
]. (p. 7)
rRotate [ [CHANNEL
CHANNEL]
]or push [ [YY
YY]
]/[ [ZZ
ZZ]
]on the microphone
to select the desired channel.
• When receiving a signal, “BUSY” appears and audio is emitted
from the speaker.
• Further adjustment of [ [VOL
VOL]
]may be necessary.
• Use the optional Voice scrambler function for privacy. (p. 10)
tPush [ [LO/DX
LO/DX]
]to turn the receive Attenuator function ON
or OFF, if necessary.
•“LOCAL” appears when the receive Attenuator is in use.
yPush [ [HI/LO
HI/LO]
]to select the output power, if necessary.
•“25W” or “1W” appears when high or low power is selected, re-
spectively.
• Choose low power for short range communications, choose high
power for longer distance communications.
• Some channels are for selecting low power only.
uPush and hold [ [PTT
PTT]
]to transmit, then speak into
∗
(Mi-
crophone).
•“TX” appears.
• Channel 70 cannot be used for transmission other than DSC.
Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83
CANNOT be lawfully used by the general public in
U.S.A. waters.
iRelease [ [PTT
PTT]
]to receive.
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [ [PTT
PTT]
], hold
the microphone 2 to 4 inches (5 to 10 cm) from your mouth
and speak into
∗
(Microphone) at a normal voice level.
WATERPROOF
SCAN
TAG
DSC/ENT
POS
HI/LO
POWER
VOL
iM502
VHF MARINE
SQL
LO/DX
IC SCR
CH/WX
DW U/I/C 916
DISTRESS
∗
(Microphone)
q
w
e
rrt
yui
DW
3BASIC OPERATION
8

3
BASIC OPERATION
9
■Call channel programming
Call channel is used to select Channel 9 (default), however,
you can program the call channel with your most often-used
channels in each channel group for quick recall.
qWhile pushing [ [HI/LO
HI/LO]
], push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) one or
more times to select the desired channel group (U.S.A., In-
ternational, Canada) to be programmed.
wPush [ [9
9]
]for 1 sec. to select call channel of the se-
lected channel group.
•“CALL” and call channel number appear.
• The order of indication precedence is “SP OFF,” “LOCAL” and
“CALL.”
e Push [ [9
9]
]again for 3 sec.
(until a long beep changes
to 2 short beeps) to enter
call channel programming
condition.
• Channel number starts blinking.
rRotate [ [CHANNEL
CHANNEL]
]to se-
lect the desired channel.
tPush [ [9
9]
]to program the
displayed channel as call
channel.
• Push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) to cancel.
• The channel number stops blinking.
■Channel comments
Memory channels can be labeled with alphanumeric com-
ments of up to 10 characters each.
Capital letters, small letters, numerals, some symbols (! #
$ % & ' ( ) * + , - ./ =) and space can be used.
qSelect the desired channel.
• Cancel dualwatch, Tri-watch or scan in advance.
wWhile pushing [ [HI/LO
HI/LO]
], push [ [9
9]
]to edit the channel
comment.
• A cursor appears and blinks.
eSelect the desired character by rotating [ [CHANNEL
CHANNEL]
]or
by pushing [ [YY
YY]
]/[ [ZZ
ZZ]
]on the microphone.
• Push [ [CH/WX
CH/WX]
]or [ [SCAN
SCAN]
]to move the cursor forward or back-
ward, respectively.
rPush [ [9
9]
]to input and set the comment.
• Push [ [HI/LO
HI/LO]
]to cancel.
• The cursor disappears.
tRepeat steps qto rto program the other channels, if de-
sired.
16
16
INT
25W
TAG
äLEASURE
16
16
DW
16
16
16
16
16
16
DW
INT
25W CALL
TAG
CALLING
INT
25W CALL
DUPTAG
INTL
3

10
3BASIC OPERATION
■Optional Voice scrambler operation
DDActivating the Scrambler
The optional Voice scrambler provides private communica-
tions. In order to receive or send scrambled transmissions
you must first activate the Scrambler function. To activate the
function, an optional UT-98 or UT-112 is necessary. See p. 41
for setting the scrambler unit. Ask your dealer for details.
The Scrambler function automatically turns OFF when
Channel 16 or 70 is selected.
q
Select an operating channel other than Channel 16 or 70.
wWhile pushing [ [HI/LO
HI/LO]
], push [ [LO/DX
LO/DX]
]( (SCR) SCR) to turn
the optional Scrambler function ON.
•“SC” appears.
eTo turn the Scrambler function OFF, repeat step w.
•“SC” disappears.
DDProgramming scrambler codes
There are 128 or 32 codes (0 to 127 or 1 to 32) available for
programming when the optional UT-98 or UT-112 is installed.
In order to understand one another, all transceivers in your
group must have the same scramble code. This function may
not be available depending on dealer setting.
qTurn power OFF.
wWhile pushing [ [9
9]
], turn power ON to enter Set mode.
eAfter the display appears, release [ [9
9]
].
rPush [ [9
9]
]one or more times to select the scrambler
code.
•“Scrambler Code” appears.
tRotate [ [CHANNEL
CHANNEL]
]to select the desired scrambler code.
yTurn power OFF, then ON again to exit Set mode.
16
16
16
16
16
16
IC
SetMode
Beep
SetMode
Scra bler
Code
SetMode
Scra bler
Code
Enter Set mode Turn OFF
POWER POWER
+
916 916
Select code
Push one or
more times.
Set mode Scrambler code item
[Example]: Programming scrambler code 8.

11
4
DUALWATCH/TRI-WATCH
■Description
Dualwatch monitors Channel 16 while you are receiving an-
other channel; Tri-watch monitors Channel 16 and call chan-
nel while receiving another channel.
■Operation
qSelect Dualwatch or Tri-watch in Set mode. (p. 39)
wSelect the desired operating channel.
ePush [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) for 1 sec. to start Dualwatch or
Tri-watch.
•“DUAL” appears during Dualwatch; “TRI” appears during Tri-
watch.
• A beep tone sounds when a signal is received on Channel 16.
r To cancel Dualwatch or Tri-watch, push [ [CH/WX
CH/WX]
]( (U/I/C) U/I/C)
again.
DW
DW
[Example]: Operating Tri-watch on INT Channel 25.
DUALWATCH/TRI-WATCH SIMULATION
•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 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
PTT]
].
Dualwatch Tri-watch
Call channel
INT
25W
DUP
16
TAG
TRI
INT
25W
DUP
16
TAG
TRI
BUSY INT
25W CALL
16
TAG
TRI
BUSY INT
25W
DUP
16
TAG
TRI
Tri-watch starts.
Signal is received
on call channel.
Signal received on
Channel 16 takes
priority.
Tri-watch resumes
after the signal
disappears.
4
3

5SCAN OPERATION
12
■Scan types
Scanning is an efficient way to locate signals quickly over a
wide frequency range. The transceiver has Priority scan and
Normal scan.
When the Weather alert function is in use, the selected
weather channel is checked while scanning. (p. 39)
Set the tag channels (scanned channel) before scanning.
Clear the tag channels which inconveniently stop scanning,
such as those for digital communication use.
Choose Priority or Normal scan in Set mode. (p. 39)
NORMAL SCAN
Normal scan, like Priority scan, searches through all tag
channels in sequence. However, unlike Priority scan,
Channel 16 is not checked unless Channel 16 is set as a
tag channel.
CH 01 CH 02
CH 06
CH 05 CH 04
CH 03
PRIORITY SCAN
Priority scan searches through all tag channels in se-
quence while monitoring Channel 16. When a signal is de-
tected on Channel 16, scan pauses until the signal disap-
pears; when a signal is detected on a channel other than
Channel 16, scan becomes Dualwatch until the signal dis-
appears.
CH 06
CH 01
CH 16
CH 02
CH 05 CH 04
CH 03

5
SCAN OPERATION
13
INT
25W
DUPTAG
INTL
INT
25W
DUPTAG
Nor alscan
BUSY INT
25W
DUPTAG
Nor alscan
SCAN
TAG
Push
Scan starts. When a signal is received
[Example]: Starting a Normal scan.
■Setting tag channels
For more efficient scanning, add desired channels as tag
channels or clear tag channels for unwanted channels. Chan-
nels not tagged will be skipped during scanning. Tag chan-
nels can be assigned to each channel group (U.S.A., Interna-
tional, Canada) independently.
qWhile pushing [ [HI/LO
HI/LO]
], push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) one or
more times to select the desired channel group.
wSelect the desired channel to be set as a tag channel.
ePush [ [SCAN
SCAN]
](
() )for 1 sec. to set the displayed channel
as a tag channel.
•“TAG” appears in the display.
rTo cancel the tag channel setting, repeat step e.
•“TAG” disappears.
Convenient: Clearing (setting) all tagged channels
➥While pushing [ [HI/LO
HI/LO]
], push [ [SCAN
SCAN]
](
() )for 3 sec. (until
a long beep changes to 2 short beeps) to clear all tag
channels setting in the channel group.
• Repeat above procedure to set all tag channels.
■Starting a scan
Set scan type (Priority or Normal scan) and scan resume
timer in advance using Set mode. (p. 39)
qSet tag channels as described at left.
wMake sure the squelch is closed to start a scan.
eWhile pushing [ [HI/LO
HI/LO]
], push [ [CH/WX
CH/WX]
](
(U/I/C) U/I/C) one or
more times to select the channel group, if desired.
r
Push
[
[SCAN
SCAN]
] to start Priority or Normal scan.
•“Pri Scan 16” or “Normal Scan” appears in the function
display.
•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.)
•Rotate [ [CHANNEL
CHANNEL]
]to check the scanning tag channels, to
change the scanning direction or resume the scan manually.
•“16” blinks and a beep tone sounds when a signal is received
on Channel 16 during Priority scan.
tTo stop the scan, push [ [SCAN
SCAN]
].
DW
TAG
TAG
DW
5

14
6DSC OPERATION
■MMSI code programming
The 9-digit MMSI (Maritime Mobile Service Identity: DSC self
ID) code can be programmed at power ON.
This function is not available when the MMSI code has
been programmed by the dealer. This code programming
can be performed only twice.
qTurn power OFF.
wWhile pushing [ [DSC/ENT
DSC/ENT]
], turn power ON to enter MMSI
code programming condition.
eAfter the display appears, release [ [DSC/ENT
DSC/ENT]
].
rEdit the specific MMSI code by rotating [ [CHANNEL
CHANNEL]
].
• Push [ [CH/WX
CH/WX]
]or [ [SCAN
SCAN]
]to move the cursor forward or back-
ward, respectively.
tInput the 9 digit codes, then push [ [DSC/ENT
DSC/ENT]
]to set the
code.
• Returns to the normal operation.
■DSC individual ID
A total of 40 DSC address IDs can be programmed and
named with up to 10 characters.
DDProgramming Address ID/Group ID
qPush [ [DSC/ENT
DSC/ENT]
]to enter the DSC menu.
wRotate [ [CHANNEL
CHANNEL]
]to select “Set up,” push
[
[DSC/ENT
DSC/ENT]
].
e
Rotate
[
[CHANNEL
CHANNEL]
] to select “Add ID,” push
[
[DSC/ENT
DSC/ENT]
] .
Setup
˘AddID
DeleteID
OffsetTi e
SelIte
POSReport
DTRSSet
˘Setup
SetMMSI
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