Raymarine a65 Installation And Operation Instructions Manual page 147

Course-Up
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Item
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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, that is, intended course.
2. Locked heading from an Autopilot.
3. Bearing to waypoint.
4. Instantaneous heading (when course-up is selected).
Note: If heading data becomes unavailable whilst in this mode,
a warning message will be shown, the status bar indicates the
Course Up in brackets and the radar uses 0° heading in relative
motion. When heading data becomes available once more,
Course-Up mode is reinstated.
Selecting the radar orientation mode
From the radar application:
1. Select Menu.
2. Select Presentation.
3. Select Orientation & Motion Mode.
4. Select Orientation.
5. Select the required orientation.
Radar motion modes overview
The motion mode controls the relationship between the radar and
your vessel. 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.
Relative Motion (RM) with optional Vessel Offset
When the motion mode is set to Relative, the position of your vessel
is fixed on the screen and all the targets move relative to the vessel.
You can specify whether the vessel is fixed in the center of the
window (0 offset) or offset by 1/3 or 2/3 to increase the view ahead,
as shown below:
Examples:
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0 offset 1/3 offset
Using radar
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Description
Current course upwards.
As your vessel's heading changes:
• Radar picture is fixed
• SHM rotates accordingly
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2/3 offset
The default motion mode is "Relative", with zero offset.
True Motion (TM)
When the motion mode is set to True, fixed radar targets maintain a
constant position and moving vessels (including your vessel) travel
in true perspective to each other and to fixed landmasses on the
screen. As the vessel's position approaches the edge of the screen,
the radar picture is automatically reset to reveal the area ahead.
Note: If heading and position data become unavailable when
True motion is selected, a warning message will be shown, the
mode will revert to relative motion and be noted in the status bar
in brackets, for example, (TM).
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Note: It is not possible to select True Motion when the orientation
is set to Head Up.
Selecting the radar motion mode
From the radar application:
1. Select Menu.
2. Select Presentation.
3. Select Orientation & Motion Mode.
4. Select Motion Mode.
Selecting Motion Mode will switch between True and Relative.
Changing the radar vessel offset
Radar offset is only available in Relative motion mode.
From the radar application:
1. Select Menu.
2. Select Presentation.
3. Select Orientation & Motion Mode.
4. Select Vessel Offset.
5. Select the required offset value.
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