3. TARGET TRACKING (TT)
3-31
3.18 TT System Messages
There are four main reasons the TT may trigger the audio and visual alerts:
You can acknowledge visual alerts and silence the audio alerts with one of the follow-
ing methods:
• Press the ALARM ACK key on the control unit
• Click the [ALERT] box, at the bottom-right of the screen.
• Click the alert in the [ALERT LIST].
• Collision alarm
• Acquisition zone alert
• Lost alert
• Target capacity
Alert title Priority Meaning Action required
CPA/TCPA Alarm A tracked target is on col-
lision course with your
vessel.
Take evasive action or ter-
minate tracking of TT.
TT NEW
TARGET
Warning Tracked target has en-
tered an acquisition
zone. The tracked tar-
get's symbol is red and
flashing.
Confirm the tracked target,
then press the ALARM
ACK key.
TT TARGET
LOST
Warning When the system detects
a loss of a tracked target,
the lost tracked target
symbol appears in red
and flashes. At the same
time, an audio alert is
produced for one sec-
ond. The lost target mark
disappears from the
screen after the lost alert
is acknowledged.
Confirm the lost target, re-
acquire if necessary.
REF TARGET
LOST
Warning When the system detects
a loss of a reference tar-
get, the target symbol
turns red and flashes. At
the same time, an audio
alert is produced for one
second. The reference
target mark disappears
from the screen after the
reference target alarm is
acknowledged.
To continue using a refer-
enced target for speed in-
put, select another tracked
target.
TT TGT FULL
(AUTO) or (MAN)
Warning Appears when capacity
for automatically (manu-
ally) acquired targets is
full.
To continue acquiring tar-
gets, cancel tracking for un-
necessary targets.
TT TGT 95%
(AUTO) or (MAN)
Caution Appears when capacity
for automatically (manu-
ally) tracked targets is
95% full.
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