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3. TARGET TRACKING (TT)
3-3
If all reference targets are lost, the speed indication disappears. Select a different
reference target if the currently selected one is lost.
• When all tracked targets are deleted, the reference target mark is also deleted and
the target-based speed becomes invalid.
• Loss of reference target will affect the calculation of true speed and true course of
targets. Further, own ship speed will be inaccurate.
Canceling echo-referenced speed input
Right click the Sensor information box then choose [Select Sensor] and [Setting].
Open the [SPD] page and select a speed sensor.
3.4 Automatic Acquisition
This radar can acquire and track a maximum of 100 targets. The number of automat-
ically and manually acquired targets is determined by the setting of [TT SELECT] in
the [TT] menu.
[TT SELECT] setting and target acquisition condition
A target just acquired automatically is marked with a dashed circle and a vector ap-
pears within one minute to indicate the target's motion trend. Within three minutes, the
initial tracking stage is finished and the target becomes ready for stable tracking. At
this time, the dashed circle changes to a solid circle.
3.4.1 How to enable auto acquisition
1. Right-click the TT mode indication then select [TT Menu] to show the [TT] menu.
2. Select [1 TT SELECT] and the acquisition condition - [MANUAL 100], [AUTO 25],
[AUTO 50], [AUTO 75] or [AUTO 100].
3. Close the menu.
Note 1: The TT indication in the TT/AIS information box shows [AUTO], [MAN/AUTO]
or [MAN] depending on the acquisition condition selected.
Note 2: When the menu-set number of automatically acquired targets have been ac-
quired, the Alert 523 "TT Auto ACQ 100%" appears in the [Alert] box.
Note 3: Targets cannot be acquired manually using the acquisition condition "AUTO
100". Also, you cannot acquire targets automatically in the acquisition condition "MAN
100".
Menu setting Acquisition condition
MANUAL 100 100 targets manually
AUTO 25 25 targets automatically, 75 targets manually
AUTO 50 50 targets automatically, 50 targets manually
AUTO 75 75 targets automatically, 25 targets manually
AUTO 100 100 targets automatically