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VHF 100/200 Series Owner’s Manual 17
Digital Selective Calling
2. The radio automatically sounds an alarm, switches to Channel 70, and transmits your
call on HI (25 W) power. You can press any key to turn off the alarm sound.
3. After transmitting your distress call, the radio automatically tunes to Channel 16 on
HI (25 W) power. Press the PTT key on the microphone or handset and speak your
message. The radio waits for an acknowledgement (ACK) on Channel 70 from a listening
station.
Sending a Designated Distress Call
When you send a designated distress call, the nature of your emergency is transmitted to the
receiving stations.
1. Lift the spring-loaded door and press the DISTRESS key.
2. Use the Channel knob to select the type of distress call:
UNDESIGNATED
FIRE
FLOODING
COLLISION
GROUNDING
CAPSIZING
SINKING
ADRIFT
ABANDONING
PIRACY
MAN OVERBOARD
NOTE: To exit this screen without sending a designated distress call, press the CLEAR key to
return to the Home screen, or press the 16/9 key to tune to Channel 16.
3. Press and hold the DISTRESS key for at least three seconds.
4. The transceiver beeps, and the screen displays “DISTRESS CALL COUNTING DOWN”.
The channel pane counts down the seconds from 3 to 1.
5. The radio automatically sounds an alarm, switches to Channel 70, and transmits your
call on HI (25 W) power. You can press any key to turn off the alarm sound.
6. After transmitting your distress call, the radio automatically tunes to Channel 16 on HI
(25 W) power. Press the PTT key on the microphone or GHS 10 handset and speak your
message. The radio waits for an acknowledgement (ACK) from a listening station.
Waiting for a Distress Call Acknowledgement
If the radio does not receive a distress call acknowledgement, the radio retransmits the
distress call at a random time between 3.5 and 4.5 minutes. This process is repeated
continually until the radio receives an acknowledgement.
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