Trial Maneuver; Types Of Trial Maneuvers - Furuno FAR-2807 Operator's Manual

3. TARGET TRACKING (TT)
3.16

Trial Maneuver

The trial maneuver feature simulates the effect on all tracked targets against
own ship's maneuver. Enter your expected course, speed and time-to-maneuver
to find the relationship between your ship and other ships against your planned
maneuver. Further, set CPA and TCPA values to find possible collision situations.
Enter various courses and speeds until a dangerous situation is resolved. The
trial manuever feature proceeds without interrupting the updating of target
information.
For more accurate results, use relative motion and sea stabilization (water
tracking) and be sure that own ship's characteristics such as acceleration and
turning performance have been properly set in the initial settings during the
installation. Take into consideration own ship's maneuvering characteristics such
as rudder delay, turning delay and acceleration delay. This is particularly
important on large vessels.
3.16.1

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 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 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. How much the delay is set the situation starts immediately
and is updated every 0.5 seconds.
In the example shown below, own ship will advance straight ahead (even after a
maneuver) for a delay time of 2:30 then alters speed and course until
operator-specified intended speed and course are achieved (position OS5 in this
example). OS6 and OS7 show changes in course and speed and OS8 show that
the ship has completed course and speed adjustments.
3-26
Delay time = 2 m 30 s.
Present own
ship position