Furuno FMD-3200 Operator's Manual page 396

26. AUTOPILOT OPERATIONS
AP CDU
No. Control, item name
1 LCD & Touch Panel
2 Course Setting Dial
3 HOME key
4 SELECT key
5 ALARM ACK key
6 Buzzer
26-12
Description
Shows various autopilot data.
Press and turn this control to set heading/course.
Go to the home screen.
Selects, deselects this unit. The LED (green) lights when
this unit is selected.
Press the ALARM ACK key to acknowledge an alert and
silence the buzzer. The LED blinks or lights (red) when
there is an active alert.
The buzzer sounds for steering mode changeover and
active alert.