Raymarine LIGHTHOUSE 4, Operation Instructions Manual

Page: 401 / 504

• Marine pontoons
Magnetic deviation
Magnetic deviation is the error induced in a compass caused by interference
from local magnetic fields.
The automatic linearization process results in a deviation value being set for
your AR200. If Augmented Reality flags in the Video app are not aligned with
their onscreen objects, or the compass is out of alignment, you should check
the AR200’s current calibration settings. For instructions on how to do this,
refer to the following section:
p.401 — AR200 calibration settings
AR200 calibration settings
The calibration settings page provides access to the AR200’s compass
calibration options.
The AR200 calibration page can be accessed using your datamaster MFD;
from the Homescreen select:
[Settings > Network > Data sources > Heading
> AR200 > Calibrate] .
Item Description
1 [Current reading:]
The current heading reported by the AR200.
2 [Maximum deviation at last calibration:]
The maximum deviation reported during the last linearization
process.
Important:
If the [Maximum deviation at last calibration] is 45° or
above, it is recommended that the AR200 unit is moved
and re-installed in a location which is subject to less
magnetic interference.
[Calibration in progress:]
While linearization is in progress the progress percentage is
displayed.
3 [Compass offset]
Once the linearization process has completed, it is possible
that the heading value may be slightly out of alignment. This is
common where installation space is limited and the AR200 is
not properly aligned with your vessel’s longitudinal axis. In this
case, it is possible to manually adjust the Compass offset.
4 [Compass lock]
When enabled, the Compass lock prevents the continual
monitoring and adaptation of the compass linearization process.
For more information, refer to:
p.402 — Compass lock .
5
[Reset calibration]
You can reset your AR200’s current linearization settings by
selecting
[Reset calibration]
Continual monitoring and adaptation
To ensure optimum performance, after the initial linearization process is
complete the unit continues to monitor and adapt the compass linearization
to suit current conditions.
ClearCruise (Object Detection / Video Analytics, and Augmented Reality)
401