Raymarine a65 Installation And Operation Instructions Manual page 123

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When you pan the chart the motion mode is no longer active.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
Find Ship from the menu. Manually changing the range or panning
the chart in auto range also suspends motion mode. The default
setting is relative motion with zero offset. The mode that you select
is restored at power up.
Relative Motion with optional vessel offset
Offset Example
Zero Offset
1/3 Offset
2/3 Offset
When the motion mode is set to Relative Motion, the position of your
vessel is fixed on the screen and the chart picture moves relative to
your vessel. You can use the Menu > Presentation > Vessel Offset
menu item to determine whether the vessel is fixed in the centre of
the window (0 offset) or offset by 1/3 or 2/3. If you change the offset
to 1/3 or 2/3, the view ahead of your vessel will be increased.
In the example shown above, the motion mode has been set to
Relative Motion, with a vessel offset of 1/3. The vessel is fixed in
the offset position and the chart moves accordingly:
True Motion
Using the chart
When the motion mode is set to True Motion, the chart is fixed and
the vessel moves in true perspective to fixed landmasses on the
screen. As the vessel's position approaches the edge of the screen,
the chart picture is automatically reset to reveal the area ahead
of the vessel.
Note: It is not possible to select True Motion when the orientation
is set to Head Up.
Auto Range
Auto Range selects and maintains the largest possible scale of chart
that will display both the vessel and the target waypoint. Auto range
is not available if radar-chart synchronization is on.
Setting the motion mode
From the chart application:
1. Select Menu.
2. Select Presentation.
3. Select Motion Mode.
4. Select True Motion, Relative Motion, or Auto Range option as
appropriate.
Once selected a tick will be placed next to the chosen motion mode
and the screen will update to reflect the new mode.
Changing the vessel offset value
From the chart application:
1. Select Menu.
2. Select Presentation.
3. Select Vessel Offset .
4. Select 0, 1/3, or 2/3 option as appropriate.
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