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Alarm/Warning
Boat speed missing
CAN bus supply overload
Check heading
Compass difference
Course difference
Cross track distance limit
Possible cause
The speed signal from the GPS or the
log is missing.
Excessive current draw.
Jump in heading of more than 10°/
second.
The difference in readings between
the main compass and the monitor
compass exceeds the limit set for
compass difference.
Compass heading is deviating too
much from the track course (BWW).
May be caused by extreme wind and
current, combined with low speed.
XTD exceeds the set XTD limit in NAV
mode. May be caused by extreme wind
and current or too low boat speed.
Recommended action
• Check device list for valid speed source
• Try a new automatic source update
• Check the GPS, log, and cable connections
• If no speed source is available, manual speed can be
entered in the "Auto" quick menu
• Check summary unit loads
• Check for short circuit/defective device on network
• Check steering compass
• Change to other heading source or monitor compass
• Check the operation of both compasses
• If one compass is magnetic, the error may be caused by
deviation change or heavy sea disturbances
• Increase speed
• Hand steer boat to align better with track and restart
navigation mode
• Manually control the vessel
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