[GPSNavX]

GPSNavX only sends out the NMEA data sentences it receives from the primary port (The interfaced GPS). If a waypoint is activated in GPSNavX ("Goto"), then GPSNavX will create and send out the $GPAPB, $GPBOD, $GPBWC, $GPRMB, $GPXTE, $GPVTG and $GPWPL NMEA sentences.