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5.8 TRIAL MANEUVERING
The trial maneuvering is the function of simulating own ship’s course and speed for collision avoidance
when a dangerous target appears. When manually entering own ship’s course and speed against the data
of the acquired target, it is checked whether the situation is dangerous or not.
The ranges of course and speed to be entered manually:
Course: 360˚ (in 0.1˚ intervals) …………………………[EBL] control
Velocity: 0 to 100 knots (in 0.1 knot steps)………………[VRM] control
……Trial Maneuvering in the True Vector Mode ………………………
In the True Vector mode, calculations are performed according to the values set by TRIAL SPEED and
TRIAL COURSE, and the result is displayed as a bold-line that represents the change of own ship’s
vector as shown in the figure below (an example of the course changed to the right).
In this figure, the dangerous target forward right becomes safe as a result of simulation.
The target data display field indicates the current CPA LIMIT and TCPA LIMIT values regardless of
the result of simulation.
● Trial maneuvering 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. As the situation is different from any actual
ship maneuvering, set values with large margins to CPA LIMIT and TCPA LIMIT.
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