
5-24 E-Series Networked Display Reference Manual
True mode
With vectors 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
boat’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 course and speed.
Relative mode
With the graphic set in Relative mode, no vector extension is shown. The CPA line
emerges from your own boat, with the target vector extension being shown as relative,
not true. The text next to the target indicates its course and speed. Press SHOW
DETAILS to display the calculated course and speed.
Setting up MARPA
1. Press TARGET TRACKING. The MARPA soft keys are displayed.
2. Press MARPA OPTIONS. The MARPA Options menu is now displayed.
3. Use the trackpad or the rotary control, to highlight the required target.
4. Use the trackpad to set the parameter to the required level.
The options menu allows you to set up the following parameters:
Parameter Options
(Default in bold)
Vector Length
The time period specified for drawing length of vectors.
0.5min, 1 min, 3 min, 6min, 12min, 30
min, 60 min
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.
OFF, 0.5 min, 1 min, 3 min, 6 min
Own vessel safe zone
The safe zone is a ring, centered on your boat, within
which a target is considered dangerous if it will enter this
zone within the
time to safe zone
period.
0.1 nm, 0.2nm, 0.5nm, 1.0 nm, 2.0nm
Time to safe zone
If a target enters your safe zone within this time period, it
is considered dangerous.
3 mins, 6 mins, 12 mins, 24 mins
Safe zone ring
Controls whether the safe zone ring is displayed or hidden
on screen
Visible
Hidden
D6600-1
TARGET
TRACKING
MARPA OPTIONS
81244_1.book Page 24 Wednesday, December 1, 2004 11:41 AM
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