
Chapter 5: Using the Radar 5-9
This is the default mode for the radar application.
North Up (N-UP)
In North Up mode, the radar picture is fixed with true north upwards. As your boat
changes its heading, the SHM will move accordingly.
Notes: (1)
If heading data becomes unavailable whilst in this mode, a warning mes-
sage will be shown and the radar uses 0° heading in relative motion.
When heading data becomes available once more, North-Up mode is re-
instated.
(2)
It is not possible to select Head Up mode when the motion mode is set to
True.
Course Up (C-UP)
In Course Up mode, the radar picture is stabilized and shown with your current course
upwards. As your boat’s heading changes, the SHM moves accordingly. If you select a
new course, the picture will reset to display the new course upwards.
The reference used for Course-Up depends upon the information available at a given
time. The system always prioritizes this information in the following order.:
1. Bearing from origin to destination, i.e. intended course.
2. Locked heading from an Autopilot.
3. Bearing to waypoint.
4. Instantaneous heading.
Note:
If heading data becomes unavailable whilst in this mode, a warning message
will be shown and the radar uses 0° heading in relative motion. When heading data
becomes available once more, Course-Up mode is reinstated.
Setting the motion mode
A
The motion mode controls the relationship between the radar and your boat. There are
two modes:
•Relative motion.
• True motion.
The selected motion mode is displayed in the status bar. The default setting is relative
motion with zero offset
D6838-1
RADAR MODE &
ORIENTATION…
PRESENTATION…
MOTION MODE
TM RM
81244_1.book Page 9 Wednesday, December 1, 2004 11:41 AM
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