Below are the standard NMEA Sentences the iFly GPS Supports along with a brief description of what that data sentence includes. NMEA supports this data but is not limited to this list.
Standard NMEA:
$GPBOD - Bearing, origin to destination
$GPGGA - Global Positioning System Fix Data
$GPGSA - GPS DOP and active satellites
$GPGSV - GPS Satellites in view
$GPRMB - Recommended minimum navigation info
$GPRMC - Recommended minimum specific GPS/Transit data
$GPRTE - Routes
$GPWPL - Waypoint location
$GPXTE - Cross-track error, Measured
Garmin Specific:
PGRMZ - Altitude Information