[DG] [DG11] Autohelm navcenter

[Derek - Raymarine - Moderator]

Hi davmori

Thank you for your enquiry,

I believe from your description that you are referring to the ST50navcenter - a black unit with a green CRT screen.

This unit had a very basic NMEA 0183 interface built into it, it would receive data in on the NMEA/Printer connection, Pin 3 being the white wire - Data +ve and pin 4 being the green wire - data -ve . So you can connect your GPS source direct to this input.

Bear in mind it was a very basic NMEA input sothe longer composite sentences used today will likely overload the input and it will buffer preventing position information getting through. try to restrict the input to GLL, GLP,GGA, RMC, RMA, GDP and try to avoid or block any other sentences.

I hope this helps?
Regards
Derek