16.13 Trails
Radar Trails (also known as wakes) enable you
to see target history. Trails will appear differently
depending on whether your Radar is set to True
motion or Relative motion mode.
Relative motion mode
In relative motion mode trails appear on targets that
are moving relative to the sea (Sea stabilized) this
includes targets that are xed to the ground, such
as piles.
Trails will not appear if a target is moving at the same
speed and in the same direction as your vessel.
Relative motion mode example
1
Target moving faster and in the same direction as
vessel (Trails appear towards your vessel’s heading)
2
Ships heading marker
3
Target moving in opposite direction to vessel (Trails
appear opposite to your vessel’s heading)
4 Target moving at approximately the same speed
and direction as vessel (Minimal to no trails)
5
Fixed target (Trial in opposite direction to your
vessel’s heading)
True motion mode
In true motion mode Radar trails appear on targets
that are moving relative to the ground.
trails will not appear on targets that are xed to the
ground.
True motion mode example
1
Ships heading marker
2
Target travelling at between 0 kt to 1 kt (Minimal to
no trail)
3 Target moving in opposite direction to vessel
(Trails appear in opposite direction to your vessel’s
heading)
4
Target moving in same direction as vessel (Trials
appear towards your vessel’s heading)
Note: You may see a Trail ‘ring’ around xed
targets due to small error factors such as rotation
time delays. This is normal operation.
Enabling Trails
From the Radar application’s Collision Avoidance
menu: (Menu > Collision Avoidance)
1. Select Trails so that On is highlighted.
Selecting Trails will switch the function between
On and Off.
2. Select Trails period.
A list of time periods is displayed:
• 10 sec
• 30 sec
• 1 min
• 5 min
• 10 min
3. Select the required time period.
Radar application
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