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function (except a Distress Call) and changes to the Mode of operation
accordingly.
5.3
SENDING A DSC CALL
5.3.1
DISTRESS CALL
5.3.1.1 Sending a Distress Call
Distress calls are initiated with the following procedure:
1.
Open the Distress cover.
2.
Press the
DISTRESS
key momentarily
.
The Text area of the display reconfigures to show the Nature of Distress
menu.
J
Note: Only having a MMSI code of your radio, can you initiate a DSC
transmission. To enter the MMSI code, see 6.11.
3.
Rotate the
Channel/Select
knob to select the Nature of Distress by using
“>” arrow.
The default selection is "UNDEFINED".
4.
Press the
DISTRESS
key for more than 4 seconds to send the Distress call.
The acoustic alarms counting second will sound intermittently.
The whole
display “flash” in sequence with the “beeps”.
If
DISTRESS
button is released before 4 seconds, the initiation of distress
call is not activated and you should press
16
key to exit and return to VHF
mode; If
DISTRESS
button is pressed for more than 4 seconds, DISTRESS
call is sent whether channel 70 is busy or not. When Distress is sent, the
display ceases to flash,
the acoustic alarm goes to a continuous tone until
acknowledgement received or
press any key is pressed to terminate the
acoustic alarm
During the distress call sequence, the Distress Cancellation menu is present
in the Text Area of the Display. See step 5.3.1.2 to cancel.
During the distress call sequence, the radio simultaneously watches Channel 70
for a DSC Acknowledgement and Channel 16. When the distress call is
acknowledged, the acoustic alarm stops and the display returns to normal VHF
operation on Channel 16, with High power selected.
If no acknowledgement is
received, the unit retransmits the DISTRESS call at random intervals of 3.5 to 4.5
minutes whether Channel 70 is busy or not until a response is received or the call
is manually cancelled. By pressing 16 Key button, the radio returns to normal
VHF.
5.3.1.2 Sending a Call to Cancel a Transmitted Distress Call
1. From the Distress Cancellation Menu, cancel the Distress Call by pressing
the
Channel/Select
key.
The text area of the display reconfigures to have the user confirm the
distress cancellation.
2. Select "YES" and push
Channel/Select
to transmit a call to cancel the
transmitted distress call. Select "NO" and press
Channel/Select
button to
abort cancellation.
Once cancellation has been confirmed, the radio returns to normal VHF
operation on channel 16 with high power selected.
5.3.2
ALL SHIPS CALL
Summary of Contents for TM-338
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