I have recently installed a raymarine s1000 autopilot on Seaspirit, all went well with the install until I tried to connect my chartplotter to the ap.

I have wired the connections as per manuals, tried other options, ie one wire connection only, but constantly get no GPS fix when I fire up the s100. Spent hours on this so far just about ready to give up.

Have surfed the web and there seems to be a theme that this chartplotter's NMEA out does not like connecting with third party product.

Two wires out of plotter NMEA out White + and Black ground NMEA - All NMEA out sentances are taggged and NMEA out is ticked. My route waypoints are 8 characters

It does give NMEA out because the Navman725 radio gets GPS Cordinates from the NMEA out connections.

Has anyone had success with third party NMEA connection with this plotter and how have you achieved the successful connection. A thread on another site talked of difficulties connecting a third party AIS to this plotter.

Picked this statement up off the web "Some NMEA devices have balanced inputs/outputs, and some have unbalanced inputs/outputs, that is the reason for the + and -" Why should the Radio work and the Raymarine does'nt.

The NMEA out of the chartplottter appears to give a low voltage when testing on a multimeter, the raymarine also talks about making the signal WEAK

Clearly this Navman has a NMEA out system different to the NMEA the Raymarine AP is expecting.

Any suggestions, thoughts that may enlighten me are welcome. Would a muliplexer solve my problem.

Cheers Seaspirit