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Reference
Troubleshooting
Chart
1) Beacon signal weak
or not received.
Interference from ship’s
electrical system, thunderstorm
activity, or another source is
inhibiting signal lock on.
Wrong frequency or bit rate
selected.
2) Accuracy not as
expected
Poor satellite geometry exists
or too few satellites are visible.
Interference to GPS antenna
and/or beacon antenna exists.
Multipath signals being
received by GPS unit.
Too far from DGPS transmitter
or not tuned to closest station.
Possible Cause
Problem
3) No output from
DGPS 53.
Unit not wired properly. Check
wiring.
Receiving device not properly
configured.