JRC JMA-993-SA Instruction Manual page 197

a o a a a a a a a a a a o a o t a o o o a t l o a o a a a a a o f o a a a a o
Guard Zone Alarm IGUARD ZONE]
CAUTION
In setting a guard zone, it is necessary to adjust radar tuning,
gain, sea clutter suppression and rain/snow clutter suppression
to ensure that target echoes are displayed in the optimum
conditions. The guard zone alarm is not generated for the
targets that are not detected by radar.
The guard zone function is used to set a zone at an arbitrary range and to sound an alarm
a target intrudes into this zone.
Refer to section 3.4 "Set Guard Zones" on how to set guard zones.
Guard zone
Guard Zone Alarm
Status
Symbol on
CRT
Alarm
characters
Alarm sound Conditions
Target
entering the
guaro zone
n
GZ
Beeping (pipipi)
Acknowledgeable
An alarm sound is
generated when a target
enters the 0.5 NM range
between the outer and inner
nngs.
5-21