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FS-1570 FS-2570 FS-5070 - Furuno

FS-1570 FS-2570 FS-5070 - Furuno

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3.3 Audio Alarms<br />

3. DSC OVERVIEW<br />

When you receive a distress alert or routine call addressed to your ship, the audio and<br />

visual alarms are released. For the distress or urgency call, the audio alarm sounds until<br />

the CANCEL key is pressed, and sounds for one minute and then automatically goes off<br />

in case of other calls. The tone of the alarm changes with the call received. By becoming<br />

accustomed to the tone, you can know which type of call you or other party have received.<br />

Alarm Frequency (interval)<br />

Safety call received 150 Hz (1000 ms) and 100 Hz (500 ms)<br />

Routine call received 150 Hz (1000 ms) and 100 Hz (500 ms)<br />

While DISTRESS button is pressed for four s 2000 Hz and 0 Hz (500 ms)<br />

Distress alert sent 2200 Hz, continuous (2 seconds)<br />

Own ship position not updated 2000 Hz (250 ms) and 0 Hz (500 ms)<br />

Distress alert call received 2200 Hz and 1300 Hz (250 ms)<br />

Distress relay call received 2200 Hz and 1300 Hz (250 ms)<br />

Distress relay ack call received 2200 Hz and 1300 Hz (250 ms)<br />

Distress ack call received 2200 Hz (500 ms) and 1300 Hz (500 ms)<br />

Urgency call received 2200 Hz and 0 Hz (250 ms)<br />

Urgency ack call received 2200 Hz and 0 Hz (500 ms)<br />

3-3

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