[DG] [DG11] No Speed over Ground

[Derek - Raymarine - Moderator]

Hi Michael,
Thank you for your enquiry.

It sounds very much like the issue is with the GPS antenna, check there is no SOG anywhere else in the network, for example the EWide display or the graphic display.

Temporarily isolate the EWide and the GPS, still the same issue? if yes, then the GPS is faulty; if no, then there is an issue elsewhere in the network where the data is becoming corrupted. Check the NMEA connection from the AIS500 to the EWide, disconnect to isolate the AIS500, still the same issue?

Using a simple trial and error method, if with all ancillary equipment disconnected the issue still remains, then the GPS is faulty.

Regards

Derek