Furuno RC-1500-1T - Manual (Page 280)

1-12
Silencing the Audible Alarm
Some error messages and alerts are accompanied by the audible alarm.
This alarm can be silenced, in most instances, by pressing any key. If
the alarm cannot be silenced in that manner, go to the Setup menu to
silence it. Note that the distress alert alarm transmitted by own ship
cannot be silenced by either method; it automatically stops when you
receive the distress acknowledge signal from LES.
Silencing the alarm by the Setup menu
1. Press [F8] to display the Setup menu.
Figure 1-12 Setup menu
2. Press [6] to display the Auto Mode Setup menu.
3. Press [ ] key to go to the Receive Alarm line.
4. Press [Enter] to open the selection window.
Figure 1-13 Auto mode setup menu