Raymarine C Series Reference Manual page 141

Chapter 6: Using the Radar
screen. Any changes that you make to the orientation of the radar are retained when
you switch off.
Head Up (H-UP)
This is the default mode for the radar application.
North Up (N-UP)
Notes: (1) If heading data becomes unavailable whilst in this mode, a warning
e.g:
N
Ship's Heading Market (SHM)
(indicating the boat's current
heading) is upwards
e.g:
N
True north at top
message will be shown, the status bar indicates North-Up in brackets
and the radar uses 0° heading in relative motion. When heading data
becomes available once more, North-Up mode is reinstated.
(2) It is not possible to select Head Up mode when the motion mode is set
to True.
N
As your boat's heading changes:
SHM fixed upwards
Radar picture rotates accordingly
N
As your boat's heading changes:
Radar picture fixed (north up)
SHM rotates accordingly
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