Furuno BB FAR28x7 - Manual (Page 160)

3. ARP OPERATION
3-28
Target full alarm
When the memory becomes full, the memory full status is indicated by
“TARGET-FULL(AUTO+MAN)” and the relevant indication appears on the
screen and a short beep sounds.
Manually acquired targets
The indication “TARGET-FULL(MAN)” appears at the screen bottom and a short
beep tone sounds when the capacity for manually acquired targets, as set on the
menu, is reached.
Automatically acquired targets
The indication “TARGET-FULL(AUTO)” appears at the screen bottom and a
short beep sounds when the capacity for automatically acquired targets, as set
on the menu, is reached.
System failure alarm
When the SPU Board receives no signal input from the radar or external
equipment, the screen shows both “ARP SYSTEM ERROR” associated with an
indication denoting offending equipment, also releasing an audible alarm. The
missing signals are denoted as shown below.
Missing Signal Indication
* Speed log signal LOG
* Heading signal, Gyrocompass GYRO
Trigger signal from radar TRIGGER
Video from radar VIDEO
* Bearing signal from radar antenna AZIMUTH
* Heading pulses from radar antenna HEADLINE
* The alarm is available with or without ARP.