Raymarine e7 User Reference page 90

Note: To prevent continuous backwards and forwards rotations
as the vessel yaws from side-to-side, the chart will not update
unless the heading changes by at least 10 degrees from the last
displayed orientation.
Note: It is not possible to select Head Up when the motion mode
is set to True.
Course-Up
In Course Up mode, the chart picture is stabilized and shown with
your current course upwards. As your vessel'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.
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If heading data becomes unavailable whilst in this mode, a warning
pop up message is displayed and the chart uses 0° heading in
relative motion.
Setting the chart orientation
From the chart application:
1. Select Menu.
2. Select Presentation.
3. Select Chart Orientation.
4. Select Head Up, North Up, or Course Up option, as appropriate.
Once selected a tick will be placed next to the chosen orientation
and the screen will update to reflect the new orientation.
Chart motion mode
The motion mode controls the relationship between the chart and
your vessel.
Whilst motion mode is active, as your vessel moves, the chart is
redrawn to keep the vessel on-screen. The 3 motion modes are:
• Relative Motion.
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• True Motion.
• Auto Range.
Note: In the 3D chart view, only Relative Motion mode is
available.
The current motion mode applies to the active instance of the chart
application.
When you pan the chart the motion mode is no longer active. This is
indicated in the status bar by brackets around the motion mode —
for example, (Relative Motion). This enables you to view another
area of the chart whilst navigating. To reset the motion mode and
return your vessel to the screen, select the Find Ship icon or select
e7 / e7D — User reference