This info was also posted on an older thread relating to a different SH radio model (GX2200), but I am entering it here, too, to make it easier for GX1300 owners to find.
Proper NMEA wiring between Garmin 740s and SH GX1300 is as follows:
GARMIN 740s <---> Standard Horizon GX1300
NMEA...
I'm about to pull the trigger on buying a Northstar GPS / multifunction display because they seem to be only outfit compatible with Smartcraft. I'd prefer Garmin but it needs NMEA to collect/display data from other sensors.
Question:
Is there a converter available to make ALL the many SC data...