Furuno FAR-2218, Operator'S Manual, Page: 167 / 294

3. TARGET TRACKING (TT)
3-27
3.17 Trial Maneuvers
The trial maneuver feature simulates the effect of own ship's movement against all
tracked targets, without interrupting the updating of target information. It is available
for use with the TT and AIS functions. For more accurate results, use sea stabilization
(water tracking).
3.17.1 Types of trial maneuvers
There are two types of trial maneuvers: dynamic and static.
Dynamic trial maneuver
A dynamic trial maneuver displays predicted
positions of the tracked targets and own ship.
You enter own ship's intended speed and
course with a certain "delay time." Assuming
that all tracked targets maintain their present
speeds and courses, the targets' and own
ship's future movements are simulated in 0.5-
second increments indicating their predicted
positions in 30-second intervals as illustrated
in the right figure.
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 consid-
eration own ship's maneuvering characteris-
tics 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 ma-
neuver) 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.
Current position