User's Manual Part 2

Operator Manual
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3748DOC020102 Edition: 14.JAN.2005
2.5.2 Select TRIAL MANEUVER
The trial maneuver feature allows the operator to see the results of possible
changes in their own speed and/or course, without actually committing their own
ship to those changes.
When the trial maneuver function is on, a large letter T flashes at the bottom of
video display. This is to remind the operator that the current radar video and
plotting data is not the true navigational situation. The user can return to normal
radar operation by clicking on Trial again.
When changing course or testing a proposed course, the trial heading is
indicated in white and by a dashed line originating from own ship.
NOTE
If True vectors are selected, your own ship’s vector will reflect any set
and drift inputs (course made good).
Target data (SPD, CSE, ID, CPA, TCPA) that is being plotted is still
shown in the actual TRIAL MANEUVER readout.
During a trial maneuver, there are no restrictions on operation within the NSC
user interface.
Alarms and warnings during the trial maneuver;
Real alarms
The ARPA tracking system continues running in the background.
If there is a real close range situation (target enters the CPA/TCPA zone limits),
an automatic alarm is generated. The target symbol flashes and a corresponding
text message appears in the alarm display.
Temporary alarms
If a close range situation occurs during the trial maneuver, the target symbols
flash.