I want to input NMEA from my Raymarine RC435i Plotter to my MarineTek
SeaMax Depth Sounder and Fishfinder. However my SeaMax manual says
that the Sounder has a three pin DIN plug (Output on 1; Input on 3;
and common on 2) and the actual SeaMax unit has a seven point DIN
plug. Can anyone tell me which points are the NMEA input and output
on the seven pin DIN plug?