Raymarine LIGHTHOUSE 4, Operation Instructions Manual

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1. Roll correction disabled
2. Roll correction enabled
26.9 AR200 Calibration (Linearization)
To enable accurate placement of Augmented Reality (AR) flags on the
camera’s video feed, the AR200’s AHRS sensors need to compensate for
local magnetic fields, as well as the Earth’s magnetic fields.
Calibration is achieved using an automatic linearization process. The
linearization process starts automatically after your vessel has turned
approximately 100°, when travelling at a speed of between 3 to 15 knots.
The linearization process requires no user input, however at least a 270°
turn is required before linearization can be completed. The duration of the
linearization process can be decreased by completing a full 360° turn, when
travelling at a speed of between 3 to 15 knots. The linearization process can
also be restarted at anytime.
In the Video app the Linearization progress bar is displayed when
linearization is in progress. The bar is filled to indicate completeness, and will
turn Red if the process is paused or otherwise interrupted.
The time taken to complete the linearization process will vary according to
the characteristics of the vessel, the AR200’s installation location, and the
levels of magnetic interference present at the time linearization is performed.
Magnetic interference can be caused by objects onboard your vessel, such
as:
• Speakers
• Electronic equipment
• Electrical cabling
• Metal bulkhead or hull
Magnetic interference can also be caused by external objects in close
proximately to your vessel, such as:
• Metal hulled vessels
• Underwater electrical cables
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