A78 - possible GPS issues

[Chuck - Raymarine - Moderator]

silverbullet87,

Unlike autopilots which are designed around a magnetic north seeking flugate/heading sensor, the S1000 is designed to use GPS COG instead of magnetic heading data. Should your MFD be reporting 000 for its heading value, then it would appear that the S1000 or SeaTalk to SeaTalkng Converter is erroneously transmitting a value (000 in this case) for the Heading data item. Should you not already have done so, then it is recommended that the SeaTalk to SeaTalkng Converter's software be updated with the latest available Raymarine product software update to ensure that it is not causing Heading to be transmitted into the SeaTalkng backbone. If the SeaTalk to SeaTalkng Converter is operating with the latest software and the problem persists, it would be necessary to interface the S1000 to the system in a different manner. The S1000 will need to be disconnected from the SeaTalk to SeaTalkng Converter and as the 6" and 7" a-Series MFDs do not feature a NMEA 0183 interface, the S1000's NMEA 0183 input leads will need to be interfaced to a NMEA 0183 to SeaTalkng/NMEA 2000 Data Bridge (ex. Actisense NGW-1-STNG, etc.) which in turn would be interfaced as a spur to the SeaTalkng backbone.