Originally Posted by River Cruiser
I have a Raymarine M81190 fluxgate compass
that I want to use with my Standard Horizon cp300i. If anyone can give me the NMEA
0183 + & - in and NMEA
0183 + & - out wire colors I would appreciate the help.
I think you're not going to be able to use it.
IIRC, that sensor doesn't talk NMEA, it is a proprietary Raymarine interface
(not even Seatalk
, HSB or anything). The cable controls and calibrates the fluxgate sensor in/outputs directly from a course computer or other unit.(see Wikipedia for a fluxgate compass).
Raymarine has a pretty good reference/FAQ/questions section on their website, I remember reading a Q/A just like yours about this/a fluxgate sensor (searched but cannot find it, Ray has reworked their site and parts
of it are really hard to navigate now).
Basically, the M81190 fluxgate sensor wiring must connect to a Ray course computer directly (or other using unit), that unit then converts the fluxgate sensor data into NMEA sentences
(HDR?) that are then output on the units NMEA or Seatalk
Download this (typical fluxgate appl) pdf manual for a "Raymarine SmartPilot X-5R Drive Installation
and Setup Guide" (link below), and look at document page 2 ("Product documents
The SPX-5R Drive system consists of a number of components connected together using a Raymarine SeaTalk bus."), and page 29-30 ("2.6 Fluxgate Compass, Compass connection
the compass cable to the Course Computer, securing it at regular intervals with suitable cable clips/ties.
Connect to the Course Computer as in the following illustration"), it has an installation wiring
diagram which I cannot reproduce here (I converted a pdf C&P to jpg, but CF wants a weblink like photobucket or whatever, so I give up).
In short, to get universal useable NMEA data from the fluxgate sensor, you need one more piece: a course computer or other Raymarine nav unit that has a fluxgate input, which will then process it and output useable NMEA heading sentences from a normal NMEA wired port (or Seatalk, etc).