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RFC35N NMEA and RFC35R Compass calibration
and alignment
Calibration:
As AP9 Mk3 only can 'listen' not 'talk' to the compass on NMEA
data (calibration start and confirmation) the RFC35N and
RFC35R have to be calibrated the following way:
• Switch the compass off/on using the circuit breaker or the
• Make
• The heading sensor is now calibrated.
Alignment (Offset)
The calibration procedure must have been carried out. Steer the boat
on a known heading. Slightly turn the heading sensor until the
correct heading readout is displayed. Tighten the screws.
General
If you take the boat more than 15-20° north or south from the latitude
where the compass was calibrated, the calibration procedure should
be repeated. Calibration data is stored in the compass and will not be
deleted until a new calibration is performed.
20169223D
separate switch.
two
360
degrees
starboard within 5 minutes from turn
on. Make sure the boat passes 3 times
through North (see figure) in smooth
and slow turns. A minimum of roll and
acceleration will give the best result.
As there is no confirmation of the
completed calibration, you will have to
verify the compass reading against one
or more known headings.
turns
to
Installation
5-65
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