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4. Tracked Target (TT) Operation
4-22
4.16 Trial Maneuver
The trial maneuver feature simulates the effect of own ship’s movement against all TTs, without interrupting the
updating of target information. It is available for use with the TT and AIS functions. For more accurate results, use
relative motion and sea stabilization (ground tracking).
4.16.1 Types of trial maneuvers
There are two types of trial maneuvers: static and dynamic.
Dynamic trial maneuver
A dynamic trial maneuver displays predicted positions of the TTs and own ship. You enter own ship's intended
speed and course with a certain "delay time." Assuming that all TTs maintain their present speeds and courses, the
targets' and own ship's future movements are simulated in one-second increments indicating their predicted positions
in 30-second intervals as illustrated below.
The delay time represents the time lag from the present time to the time when own ship will actually start to change
her speed and/or course. You should therefore take into consideration own ship's maneuvering characteristics such
as rudder delay, turning delay and acceleration delay. This is particularly important on large vessels. How much the
delay is set the situation starts immediately and ends in a minute.
In the example shown below, own ship will advance straight ahead (even after a maneuver) for a delay time of 2:30
and alters speed and course until operator-specified intended speed and course are achieved (position OS7 in this
example).
Delay time = 2 m 30 s.
Present own
ship position
Dynamic trial maneuver