Advanced NMEA Output SetupIf you are going to interface the GPSMAP 496 with another piece ofequipment (such as a radar or autopilot), the unit needs to be set tooutput NMEA data. The NMEA data transmission can be customizedto keep the output rate at two seconds. If too many NMEA sentencesare selected the unit can take longer than two seconds to update. Youcan also set the rate to Fast to output a minimum number of NMEAsentences at 1-sceond intervals.To access the Advanced NMEA Output Setup:1. Press MENU twice to open the Main Menu.2. Use the ROCKER to select Setup from the vertical tab list.3. Select Interface from the row of tabs along the top.4. Highlight the field below Serial Data Format. Press ENTER.5. Select NMEA In/NMEA Out. Press ENTER.6. Press MENU to open the options menu. Select AdvancedNMEA Setup, and press ENTER.Advanced NMEA Output SetupThe Advanced NMEA Output Setup Page allows you to set theoutput rate, change the precision of the Lat/Lon minutes, setWaypoint IDs to names or numbers, as well as turn on and off theGPS status, the GARMIN Proprietary sentences, and Waypoint/Route (WPL, RTE).GPSMAP 496 NMEA Sentence Output (NMEA version 3.01compliant):• Always transmitted: GPRMC, GPGGA, GPGLL, GPBWC,GPVTG, GPXTE, GPRMB• Switchable sentences: GPGSA, GPGSV, GPWPL, GPRTE• GARMIN proprietary: PGRME, PGRMZ, PGRMM, PGRMHGPSMAP 496 Owner’s Manual 125M AIN MENU > SETUP TAB
