Boat has Raymarine Autohelm
4000 installed... works great! Only accessory that I see is the wired remote
unit that plugs into the main control module. This is the older style without LCD.
Under the main unit there are 2 inputs... 1 for windvane
, 1 for remote
Currently the unit holds course off of the internal gimbaled compass
The manual says that it is compatible NMEA0183.
Recently, I purchased Garmin
78SC handheld GPS/Chartplotter.
Associate at west marine
sold me a data cable/hard wire power for the garmin
unit and explained that the track/chartplotter features of the GPS
unit would communicate with the autohelm
using NMEA0183 to hold the course but was unable to offer any info farther than here are the pieces... have a nice day.
My question is, is it this simple?
will the Garmin send the equivalent +/- navigation
commands to the autohelm to keep us on course?
Do I need an additional unit?