Furuno FM-8900S Operator's Manual page 66

4. DSC GENERAL MESSAGE CALLING, RECEIVING
1. Press the CANCEL key to silence the audio alarm and erase the pop-up mes-
sage.
2. Watch on the working channel. Communicate by radiotelephone.
3. After you have completed communications, rotate the CHANNEL/ENTER knob to
select [QUIT] in the user options area then push the knob.
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