Furuno RC-1500-1T - Manual (Page 373)

6-3
Transmitting a Distress Alert
1. Open cover on DISTRESS button.
2. Press the DISTRESS button 4 seconds on Distress Alert Unit IC-
302.
Note: Within 3 seconds, the distress alert will not be tramsmitted.
The lamp inside the button flashes quickly and an audible alarm
sounds intermittently. Four seconds later, the distress alert is trans-
mitted and light the lamp and an audible alarm sounds continu-
ously. When you receive acknowledgment of the distress alert
from an LES, the lamp flashes slowly and the audible alarm sounds
intermittently.
To silence the audible alarm, press [F10].
Figure 6-4 Distress Alert Unit IC-302
Do not press the button to silence an alarm for incoming distress
or urgent message. This will transmit a distress alert for own ship.