Instruction Manual

CHAPTER10. HOW TO USE SD-250(ALARM

BOX)

10-1 DISTRESS TRANSMITTING

1) If you press 'Distress key' (Red Button) for 3 sec., it alarms for 3 seconds.

After that, the red light is turned on with bip-sound.

While Distress Key is blinking, transmitting is started to work and location of disaster,

time, ship's ID are sent to DSC 6 CH in order.

If there is no answer, it does sending till getting an answer through CH1 to CH 6.

2) In order to stop the transmitting, press the 'Reset key'

※ If distress signal is sent by mistakes, contact to marine police or station, SAR.

10-2 IN CASE OF RECEIVING DISTRESS SIGNAL

1) Distress LED blinks and sounds 'bip'.

Check contents displayed on the screen and press Reset key to stop.