Raymarine C Series GPS Receiver User Manual


 
84 C-Series Display Reference Manual
Setting the orientation of the chart
The orientation of a chart refers to the relationship between the chart and the direction
that you are travelling in. It is used in conjunction with motion mode (see
page 85
) to
control how your boat and chart relate to one another and how they are displayed on
screen. The mode that you choose is restored at power up. Any changes that you make
to a chart window that is set to system view will be reflected in all other system view
chart windows. The following options are available:
North Up (N-up)
In North Up mode, the chart orientation is fixed with true north upwards. As your
heading changes the boat symbol moves accordingly. This is the default mode for the
chart application.
Head Up (H-up)
Head Up mode displays the chart with your boat’s current heading upwards. As the
heading changes the boat symbol remains fixed and the chart picture rotates accord-
ingly.
Notes: (1)
To prevent continuous backwards and forwards rotations as the boat
yaws from side-to-side, the chart will not update unless the heading
changes by at least 10 degrees from the last displayed orientation.
(2)
It is not possible to select Head Up when the motion mode is set to True.
Course Up (C-UP)
In Course Up mode, the chart picture is stabilized and shown with your current course
upwards. As your boat’s heading changes, the ship symbol 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.
If heading data becomes unavailable whilst in this mode, a warning message will be
shown and the chart uses 0° heading in relative motion.
To set the orientation of the chart:
D6511_2
CHART MODE AND
ORIENTATION…
PRESENTATION…
ORIENTATION
H-UP N-UP C-UP
81221_4.book Page 84 Tuesday, February 28, 2006 5:24 PM