JMA-9172-SA Instruction Manual > 5.OPERATION OF TARGET TRACKING AND AIS > 5.4 DECISION OF TARGETS AS IDENTICAL
(Association)
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Once regard as identical, when one of the differences exceed 125% of the set condition, they
are regarded as dissidence.
5.4.3 Types of Decision Conditions to be Set
The setting for this function is common to Association Setting in
the AIS Menu.
Decision conditions
1. Association On / Off (Function to decide targets as
identical)
2. Priority AIS / TT (Symbol to be displayed)
3. Bearing
0.0～9.9°
4. Range
0～999m
5. Cource
0～99°
6. Speed
0～99kn
7.Applicable AIS Target ACT or ACT&Sleep (activated AIS target or
all AIS target)
If a great value is set as a condition for deciding
targets as identical, a tracking target near an AIS target
is regarded as identical to the AIS target and it may not
be displayed any more.
For example, when a pilot boat (which is a small target
not being tracked) equipped with an AIS function
approaches a cargo ship as a tracking target not
equipped with an AIS function, the tracking target
symbol of the cargo ship may not be displayed any
more.
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