#TN002

 #Summary

I’m using a differential GPS but I can’t get the differential light to show on the panel.

 #Problem

1. GPS incorrectly setup.
2. seaPro incorrectly setup.
3. Problem with the transmitted differential signal.

#Solution

 GPS incorrectly setup.

1. Find the interface or communications screen on your GPS.
2. Check that the GPS is setup to transmit “GGA” position.

seaPro incorrectly setup.

1. Select “Setup” from the main menu, then “Nav properties”, and then “NMEA Rx”.
2. Tick the “GGA” NMEA sentence, and remove the tick from any other “Position” sentence, E.g. “GLL”

Problem with the transmitted differential signal.

1. Check that you are in range of a transmitter.
2. Check that the GPS is receiving the differential correction.
3. Check that the transmitter is functioning.