6-53 Section 6 Target Tracking and AIS
6.13 Trial Manoeuvring
Memo
• Trial manoeuvring is to simulate own ship's course and speed in the conditions that the
course and speed of a target ship are unchanged as they are. The situation is different from
any actual ship manoeuvring, so set values with large margins to CPA Limit and TCPA Limit.
• During trial, the CPA/TCPA (TT) alarm cannot be approved. To approve the alarm, terminate
6.13.1 Outline of trial manoeuvring
The trial manoeuvring is the function of simulating own ship's course and speed for collision avoidance
when a dangerous target appears. When the own ship's course and speed are entered in manual
mode, the trial manoeuvring function checks if pre-acquired or pre-activated targets are dangerous.
Trial manoeuvring in the true vector mode
If the own ship's vector mode is the true vector mode, the own ship's vector is calculated according to
the own ship's trial speed and trial course as well as the own ship's dynamic characteristic, and the
result is displayed as the own ship's expected course. The following figures show an example of
veering to the left: the dangerous target at front right has changed to a safe target as a result of trial
manoeuvre.
The tracked target information indicates the current CPA and TCPA values regardless of the result of
simulation.
Trial Manoeuvring in the True Vector Mode
as
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