#TN003

 #Summary

Why does the differential light flash on and off?

 #Problem

seaPro incorrectly setup.
Problem with the transmitted differential signal.

#Solution

If this is occurring a short regular interval the most likely cause is seaPro is decoding two sentences from the GPS, a non-differential enabled
one such as GLL and a differential enabled one such as GGA.

seaPro incorrectly setup.

Select “Setup” from the main menu, then “Nav properties”, and then “NMEA Rx”.
Select the GPS sentence as “GGA” NMEA sentence

Problem with the transmitted differential signal.

1. Check that you are in range of a functioning transmitter.
2. Check that the GPS is receiving the differential correction.
3. If using satellite correction service such as WASS / EGNOS the service can be intermittent