Trial Maneuvering; Trial Maneuvering In The True Vector Mode - JRC JMA-9922-6XA Instruction Manual

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5.8
Attention
In trial maneuvering, a simulation is executed with the current course and speed
of the target ship. Since the situation is different from actual ship maneuvers, the
CPA LIMIT and TCPA LIMIT should be set with ample leeway.
Trial maneuvering is used to simulate the course and speed necessary to avoid a collision
when a dangerous target appears. When the ship's course and speed are manually
entered against the data of the acquired target, a check is made to determine whether there
is any danger.
The ranges of course and speed to be entered manually are as follows:
Course: 360 degrees (0.1 degree intervals) .................. [EBL] control
Speed:
Trial Maneuvering in the True Vector Mode¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥
In the True Vector mode, calculations are made 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 the own ship's vector as shown in the figure below (an example of the course
changed to starboard).
In this figure, the dangerous target that is ahead to the port side becomes safe as a result of
the simulation.
The target data display field indicates the current CPA LIMIT and TCPA LIMIT values
regardless of the result of the simulation.
NORMAL
Dangerous target
Own ship
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TRIAL MANEUVERING

0 to 100 knots (0.1 knot steps)......................... [VRM] control
TRIAL
HL
Change in course
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Own ship
T
5-24
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Change of symbol as a
result of trial maneuver
HL
Trial speed (vector time)
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‚ T