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4-1
4 DISTRESS OPERATIONS
4.1 Sending Distress Alert
GMDSS ships carry a DSC terminal with which to transmit the distress alert in the event of
a life-endangering situation. A coast station receives the distress alert and sends the
distress alert acknowledge call to the ship in distress. Then, voice or telex communications
between the ship in distress and coast station begins.
Transmission of the distress alert and receiving of the distress alert acknowledgement are
completely automatic - simply press the [DISTRESS] button to initiate the sequence. Note
that the distress can also be transmitted from the Telex Distress Alert Button IC-302-DSC.
Russian version
• Audio alarm is released continuously after transmitting distress alert.
• The [CANCEL] key can be used during the transmission of the distress alert. The
transmission sequence is stopped at the end of the fifth transmission.
4.1.1 Sending distress alert by DISTRESS button, nature of distress
not specified
1. Open the DISTRESS button cover and press and hold down the [DISTRESS] button
more than three seconds. The button flashes in red and the buzzer sounds rapidly. The
display shows the contents of the distress alert call: your ship’s nature of distress,
position, time and the DSC frequency over which the alert has been transmitted.
The number of seconds to continue pressing the [DISTRESS] button appear at the
bottom of the display. The buzzer sounds continuously and the lamp in the button lights
when the button has been pressed three seconds. You can release the button at that
time.
KEEP PRESSED FOR 3S
NATURE: UNDESIGNATED
POS:
12
°
34N 123
°
45E AT 12:34
TELEPHONE
2182.0 KHZ
Distress button
pressed!
Displays number of seconds to continue
pressing the [DISTRESS] button to
transmit the distress alert.
DSC FREQ :
2187.5 KHZ
Nature of Distress
Position, Time
DSC Distress
Frequency used
to transmit the
distress alert