Raymarine Marine GPS System User Manual page 170

RayTech Navigator User's Guide
Connecting Directly an Autopilot
Then following cabling instructions apply to most autopilot systems;
however, you should also refer to the "Connecting Specific Instruments
and Devices" section later in this appendix and to the manual that came
with your autopilot. Your autopilot must support NMEA 2.1 strings
APA or APB.
To connect directly to an autopilot, refer to Figure A-1 and Table A-4.
Table A-4. Connecting Navigator Directly to Autopilot System
A-6
Connect Cable Color:
Yellow (Rx)
Blue (SGnd)
Green (Tx)
Black (SGnd)
To Autopilot Lead:
Not used
Not used
NMEA + input
(which may also be labeled RX, RX+,
Data In+, or NMEA IN+)
NMEA - input
(which may also be labeled RX-,
Data In -, or NMEA IN-, or Ground)