Simrad ARGUS FMCW 3G, User Manual

Page: 107 / 150

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Tracking | Argus Radar Operator Manual
To obtain realistic results, the ship’s turn delay and the time required for evaluation and deci-
sion, are taken into consideration by means of a delay that can be manually inserted.
The Trial Manoeuvre functions allow course changes of up to
±
135° from the original course,
to be tested. To warn the operator that data displayed are not related to the actual situation,
any time the Trial Manoeuvre is in use:
• a large “T” symbol is displayed on the lower part of the PPI
• on own ship section the word TRIAL follows the gyro value, highlighted in red color (“Auto-
matic Trial Manoeuvre scenario” on page 108)
• The Alarms button (“Alert and system failures” on page 129, second column, red button) will
be displayed, and it will say “TRIAL EXECUTED” in red background (“Manual Trial Manoeuvre
scenario - After the execution” on page 109).
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Note: If at the beginning of the Trial Manoeuvre, the “Delay Time” is set higher than the lower
TCPA of dangerous targets, the “WRONG: Delay Time Too Long” message will be shown in the
warnings and wrong orders section (“Alert and system failures” on page 129, 2nd column,
yellow button) and the manoeuvre is not executed.
The simulation of a possible manoeuvre is processed as follows:
•
Own ship moves along its original course with its original speed for the time set in the “Delay
Time” field
•
If no course change has been requested, the simulation ends after the time-out. It is not pos-
sible to set the ROT field to zero to force a steady course
• If a course change has been requested, own ship turns toward the course set in the “Trail
Course” box and its speed is the final speed. The turn is done by using the specified rate of turn
• Then the ship is stopped and the final manoeuvre data is calculated and displayed.
Warning: Trial Manoeuvre result is more clearly evaluated when the presentation is on
Relative Motion. More accurate estimations are made when the speed source is sea stabilised.
The Trial Manoeuvre can be performed in Manual or Automatic mode. In Manual mode the
final course must be manually entered by the operator, in Automatic mode the final course is
computed by the system to reach the fastest way out of a dangerous situation.
Manual trial manoeuvre
The Manual Trial Manoeuvre is intended to be used in situations, where a course or speed
change is foreseen, and the new course must be tested for potentially dangerous targets.
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Note: The Manual Trial Manoeuvre shall not be used if the situation is already dangerous.
In order to perform the Manual Trial Manoeuvre, the operator must fill in the data related to
the final Course and Speed (“Trial manoeuvre window - Before the execution - Detail” on page
107). Normally the ROT, and Delay Time assume the default values, set according to ship’s
type, tonnage, etc. The operator can assume or change these values.
The following steps must be performed to operate with the Manual Trial Manoeuvre:
1. Press the “Trial Manoeuvre” button (“Tracking menu” on page 101) to open the Trial Ma-
noeuvre Menu (“Trial manoeuvre window - Before the execution - Detail” on page 107).
2. If the first button on the top left part of the menu is labelled “Trial Auto”, press it to set the
mode to Manual.
3.
Set the desired final course by placing the cursor on the relative spin box, watching the help
line and using the SKs.
4.
Follow the same procedure to set the desired trial speed, the ROT and the delay to the begin-
ning of the manoeuvre; for the delay value, take care of the possible delay time own ship
needs to reach the trial speed and to start steering.
5. Press and hold the “Trial Exec” button and the manoeuvre will be computed.
During the trial manoeuvre the time figure increases, and when the trial is completed, the
alarm “Trial Executed” is displayed in the alarms area.
In the lower part of the menu, it is possible to check out the values of CPA and TCPA of targets
selected, which, during and at the end of the computing are the calculated values from the