Lowrance Elite FS 7 User Manual page 149

Radar symbology
You can select which optional radar items that should be turned
on/off collectively from the menu. Refer to the Radar panel
illustration.
Bearings
Used for selecting whether the bearing should be measured in
relation to True/Magnetic North (°T/°M), or relative to own vessel
(°R).
Ú Note:
True bearing can only be selected when a compass is
available.
Data bar
Turns on/off the radar data bar. Refer to the radar panel illustration.
By default, the data shows targets arranged with the most
dangerous targets on top. You can select to show radar targets on
top and before any AIS targets, even if the AIS targets are
considered more dangerous.
MARPA settings
History length
Trails can be used to visualize the previous positions of a tracked
target.
The history length defines the time presentation of the trail.
Safe ring
A safe ring can be added around your vessel to present the danger
zone. The radius of the ring is the same as the closest point of
approach as set in the Dangerous Vessels dialog. Refer to "Defining
dangerous vessels" on page 155.
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Radar| ELITE FS User Manual