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3. Using the trackpad, highlight the required option, then press the
trackpad right to select it.
Displaying vessel vectors (CPA graphics)
1. Position the cursor over the target.
2. To display the CPA graphic for the target, press the CPA
GRAPHIC softkey until the ON option is selected.
3. To hide the CPA graphic for the target, press the CPA GRAPHIC
softkey until the OFF option is selected.
4. To display the CPA graphic automatically when you place the
cursor over any part of the MARPA symbol, select the AUTO
option.
5. Press the OK button.
MARPA options
The MARPA options are accessible by pressing the TARGET
TRACKING > MARPA & AIS OPTIONS softkeys.
Parameter Descriptions Options
Vector Length The time period
specied for drawing
length of vectors.
• 0.5 min
• 1 min
• 3 min
• 6 min
• 12 min
• 30 min
• 60 min
Parameter Descriptions Options
Target History Plots a target’s previous
position at specied
intervals. The four
most recent position
points are displayed.
If True target vectors
are selected, the four
most recent vessel
position points are also
displayed.
• OFF
• 0.5 min
• 1 min
• 3 min
• 6 min
Own Vessel Safe Zone The safe zone is a ring,
centred on your boat,
within which a target is
considered dangerous
if it will enter this zone
within the Time to Safe
Zone period(see below).
• 0.1 nm
• 0.2 nm
• 0.5 nm
• 1.0 nm
• 2.0 nm
Time to Safe Zone If a target enters your
safe zonewithinthis time
period, it is considered
dangerous.
• 3 min
• 6 min
• 12 min
• 24 min
Safe Zone Ring Controls whether the
safe zone ring is
displayed or hidden
on screen.
• Visible
• Hidden
Using radar
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