When the lcom MA-500TR
CLASS B AIS TRANSPONDER
is con-
nected to your IC-M504/IC-M505/IC-M603/IC-M604
VHF MARINE
TRANSCEIVER
, an individual DSC call can be transmitted to a
selected AIS target using the transponder, without needing to
enter the target’s MMSI code.
See the transponder’s manual for connecting instructions.
To ensure correct operation of the DSC function, make
sure you correctly set the transceiver’s squelch.
MAKING AN INDIVIDUAL DSC CALL USING AN AIS TRANSPONDER
Procedures
Transponder’s display
Transceiver’s display
Step
q
: Transponder’s operation
Select a desired AIS target on the plotter, target list or danger list
display.
• You can also go to the next step whenever the detail screen of the AIS
target is displayed.
• Make sure the transceiver is in the normal operating mode. Otherwise,
you cannot make an individual DSC call using the transponder.
Step
w
: Transponder’s operation
Push
[DSC]
to display the voice channel selection screen, and then
push
[
Y
]
or
[
Z
]
to select a desired voice channel*.
• Voice channels are already preset into the transponder in recommended
order.
* When a base station is selected in step
q
, a voice channel will be spec-
ified by the base station, therefore you cannot change the channel. The
transponder will display “Voice Channel is specified by the Base station,”
in this case.
Step
e
: Transponder’s operation
Push
[DSC]
to make the transceiver to transmit an individual DSC
call to the AIS target.
• If Channel 70 is busy, the transceiver stands by until the channel becomes
clear.
• If the transceiver cannot make the call, the transponder will display “DSC
Transmission FAILED.”
Individual Call
Step
r
: Transponder’s operation
After making the individual DSC call, the transponder will display
“DSC Transmission COMPLETED.”
• Push
[CLEAR]
to return to the previous screen before you entered the
voice channel selection screen in step
w
.
• The transceiver stands by on Channel 70 until an acknowledgement is
received.
Individual Call
TX Complete
Now Waiting for ACK
<CLR Exit>
Step
t
: Transceiver’s operation
When the acknowledgement ‘Able to comply’ is received, beeps
sound and the transceiver automatically selects the channel spec-
ified in step
w
.
If the acknowledgement ‘Unable to comply’ is received, beeps sound
and the transceiver’s display returns to the operating channel select-
ed before making the individual DSC call.
• Push
[CLR]
to stop the beeps.
• You can check the MMSI code or the name (if programmed) of the AIS
target on the display.
Step
y
: Transceiver’s operation
After receiving the acknowledgement ‘Able to comply’ in step
t
,
push and hold
[PTT]
to communicate with the AIS target.
[DSC]
[CLEAR]
[
Z
]
[
Y
]
TRANSPONDER
A-6527D-3EX
25W
INT
DUP
Received
Unable ACK
<123456789
<CLR˘
Beep Off>
INTL
‘Unable to comply’ is received.
16
TRANSCEIVER (IC-M603/M604)
[CLR]
[PTT]
(Example)
25W
INT
DUP
34°34.506N
123°23.236W
UTC 12:00
INTL
‘Able to comply’ is received
‘Unable to comply’ is received
25W
INT
Received
INDV ACK
<123456789
<CLR˘
Beep Off> COMMERCIAL
These instructions are based on using the IC-M604. The dis-
played screens, indications or operations may differ slightly
from the instructions, depending on the transceiver.
