I have my
radio connected to my RL70CR+. I used the
NMEA 183 connections out of the standard connector. I found that because the previous
radio did not have this feature the wires had been taped over but were there. All of my Ray
Marine instruments were connected via the
seatalk buss so the NMEA wired were not used. If you have NMEA 183 instruments then you will need to connect the radio wired into that circuit. It was all quite painless. If your original
installation did not include the connector for NMEA out, I'm not sure what your going to do. If you have an NMEA enabled
GPS it can drive more than 1 output so you could connect directly to it. If it's a
seatalk GPS you're probably out of luck and will need a seatalk to NMEA interface. I'll bet some
Raymarine dealer/repair shop somewhere has an nmea out cable sitting on a shelf somewhere, but it may be hard to find.