the dangerous target symbol and flashes to indicate that it is a dangerous target. Pressing the appropriate soft key will silence the alarm and remove the warning.
If a target is lost, either because the MARPA software has lost contact with it, or because it has moved out of range, an audible alarm is sounded and an
Effective range for MARPA targets
MARPA target acquisition is only available at radar range scales of up to 12nm, although tracking continues at all ranges.
If you change to a smaller range scale, targets may be beyond the range of your scanner and will be lost. In such cases, an
Status symbols for MARPA targets
Each target is shown in the radar display as a symbol, which indicates its status:
Vessel vectors (CPA graphics) overview
CPA graphics show vectors for your vessel and a selected target.
A vector is a line
True mode
With the display set in True mode, the vectors of your vessel and the target are shown extended to their intersection point. The CPA is shown as a line that is placed on your vessel’s vector at the point of the CPA. The length and direction of the line indicates the distance and bearing of the target at CPA. The text indicates CPA and TCPA. The text next to the target symbol indicates its true course and speed.
Relative mode
With the display set in Relative mode, no vector extension of your vessel is shown. The CPA line emerges from your own vessel, with the target vector extension being shown as relative, not true. The text next to the target indicates its course and speed.
Setting up MARPA
In the radar application:
1.Press the TARGET TRACKING softkey.
2.Press the MARPA AND AIS OPTIONS softkey.
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