JRC JMA-993-SA Instruction Manual page 200

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5.8
TRIAL MANEUVERING
Aftention
ln lrial maneuvering, a simulation is executed with the curent 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: 0 to 100 knols (0.1 knot steps)...... . . IVRMI control
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 boldJine 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 cunent CPA LIMIT and TCPA LIMIT values
regardless of the result of the simulation.
NORMAL TRIAL
Trial speed (vector timc)
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