Furuno FR-2105-B - Manual (Page 102)

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2.16 Trial Maneuver
Trial simulates the effect on all tracked targets against own ship's maneuver without
interrupting the updating of target information.
There are two types of trial maneuvers: static and dynamic.
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 one-second increments indicating their predicted positions in
one-minute 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 5 minutes and then alters speed and course until operator-specified
intended speed and course are achieved (position OS7 in this example).
A A0
B
B0
OS0
A1
A2
A3
A4
A5
A6
A7
A8
OS1
OS2
OS3
OS4
OS5
OS6
OS7
OS8 B1
B2
B3
B4
B5
B6
B7
B8
Present own
ship position
Delay time = 5 min.
T
Dynamic trial maneuver
Note that once a dynamic trial maneuver is initiated, you cannot alter own ship's trial speed,
course or delay time until the trial maneuver is terminated.