Raymarine E Series User Reference Handbook page 145

MARPA options
The MARPA options are accessible by pressing the TARGET
TRACKING > MARPA & AIS OPTIONS softkeys.
Parameter Descriptions
Vector Length The time period
specified for drawing
length of vectors.
Target History Plots a target's previous
position at specified
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.
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).
Using radar
Parameter
Time to Safe Zone
Options
• 0.5 min
• 1 min
Safe Zone Ring
• 3 min
• 6 min
• 12 min
• 30 min Using MARPA
• 60 min
Acquiring a MARPA target to track
• OFF
In the radar application:
1. Select the TARGET TRACKING softkey.
• 0.5 min
2. Move the cursor over the target to be acquired.
• 1 min
3. Select the ACQUIRE TARGET softkey.
• 3 min
The "target being acquired" symbol is displayed. If the target is
• 6 min
present for several scans, the radar locks-on to the target, and the
symbol changes to "safe target" status.
Cancelling a MARPA target
• 0.1 nm
In the radar application:
1. Move the cursor over the relevant target.
• 0.2 nm
2. Press the CANCEL TARGET softkey.
• 0.5 nm
3. Alternatively, display the MARPA target list by pressing the
• 1.0 nm
4. Using the trackpad, select the relevant MARPA target from the
• 2.0 nm
5. Press the CANCEL TARGET softkey.
Descriptions
If a target enters your
safe zone within this time
period, it is considered
dangerous.
Controls whether the
safe zone ring is
displayed or hidden
on screen.
TARGET TRACKING, then MARPA LIST softkeys.
list.
Options
• 3 min
• 6 min
• 12 min
• 24 min
• Visible
• Hidden
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