4. Tracked Target (TT) Operation
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4.15 TT Alerts
There are nine situations which cause the TT to trigger visual and audio alarms. To silence the audio alarm, push the
ALARM ACK key, or select the ALARM ACK box then push the left button.
TT alerts
Message no. Message Alert category Description
110 TT dangerous target Alarm A tracked target is on collision course.
111 TT target in ACQ ZONE Warning Tracked target has entered an acquisition zone.
The target's symbol is red and flashing.
112 TT lost target Warning When the system detects a loss of a tracked
target, the target symbol turns red and flashes. At
the same time, an audible alarm is produced for
one second. The lost target mark disappears from
the screen after the lost target alarm is
acknowledged.
114 TT AUTO ACQ 100% full Warning Appears when capacity for automatically acquired
targets is full.
115 TT AUTO ACQ 95% full Warning Appears when capacity for automatically tracked
targets is 95% full.
116 TT MAN ACQ 100% full Warning Appears when capacity for manually acquired
targets is full.
117 TT MAN ACQ 95% full Warning Appears when capacity for manually tracked
targets is 95% full.
118 TT System error Warning When the Main CPU receives no signal input
from ARPA, the screen shows "TT System error"
with an indication denoting offending equipment,
also releasing an audible alarm.
120 TT lost REF target Warning When the system detects a loss of a reference
target, the target symbol turns red and flashes. At
the same time, an audible alarm is produced for
one second. The reference target mark disappears
from the screen after the reference target alarm is
acknowledged.
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