Standard Horizon GX2400GPS Owner's Manual page 49

Basic Operation
1. Lift the red spring loaded [DISTRESS] cover, then press
and hold the [DISTRESS] key for 3 seconds. The radio
display will count down (3-2-1) and then transmit the
distress alert. The backlight of the display and keypad
flashes while the radio's display is counting down.
2. When the distress signal is sent, the transceiver
watches for a transmission on CH70 until an acknowl-
edgment signal (distress acknowledgement) is
received.
3. If no acknowledgment is received, the distress alert
is repeated in 4-minute intervals until an acknowledg-
ment is received.
4. When a distress acknowledgment is received, a
distress alarm sounds and Channel 16 is automati-
cally selected. The display shows the MMSI of the
ship responding to your distress.
5. Press the microphone PTT switch and state your name, vessel name,
number of persons on board and the distress situation, then say "over"
and wait for a reply from the acknowledging ship.
6. To turn the distress alarm OFF before the radio retransmits the distress
alert, press the [16/S] key or the [QUIT] soft key.
Transmitting a Distress Alert with Nature of Distress
The transceiver is capable of transmitting a distress alert with the following
"Nature of Distress" categories:
Undesignated, Fire/Explosion, Flooding, Collision, Grounding, Capsizing,
Sinking, Adrift, Abandoning, Piracy, MOB.
[ ]  "DSC CALL"  "DIST ALERT MSG"
1.
2. Press the [NATURE] soft key. The "NATURE OF"
menu will appear on the display.
3. Rotate the DIAL/ENT knob to select the desired nature of distress category,
then press the [SELECT] soft key.
4. Press and hold the DISTRESS key until a distress alert is transmitted.
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