Reference
55
NMEA Interface
If you are going to interface the GPSMAP 176 with another piece of equipment (such as a radar
or autopilot), the unit needs to be set to output NMEA data. The NMEA data can be customized to
shorted the update time from the unit. If too many NMEA sentences are activated, the unit may take
longer than two seconds to update.
To activate the NMEA data:
1. With the GPSMAP 176 turned on, press MENU twice to display the Main Menu. Use the ARROW
KEYPAD to select the Comm tab.
2. Highlight the ‘Serial Data Format’ fi eld and press ENTER.
3. Select ‘NMEA In/NMEA Out’ and press ENTER.
Advanced NMEA Output Setup
The GPSMAP 176 NMEA data transmission can be customized to keep the output rate at two
seconds. If the unit is set up to output all of the available NMEA sentences, the output rate may exceed
two seconds. The ‘Advanced NMEA Output Setup’ page will allow you to turn on/off the GPS status
(GSA. GSV), Waypoint/Route (WPL, RTE) and the GARMIN Proprietary sentences. You can also change
the precision of the Lat/Lon minutes.
To set up the Advanced NMEA page:
1. With ‘NMEA In/NMEA Out’ selected, press MENU. Select ‘Advanced NMEA Setup’ and press ENTER.
2. To turn a fi eld On/Off, place the highlight over the desired fi eld and press ENTER. Make a selection
and press ENTER again to accept the selection.
GPSMAP 176 NMEA Sentence Output (NMEA version 2.3 compliant)
Always transmitted: GPRMC, GPGGA, GPGLL, GPBWC, GPVTG, GPXTE, GPRMB
Switchable sentences: GPGSA, GPGSV, GPWPL, GPRTE
GARMIN proprietary: PGRME, PGRMZ, PGRMM
Main Menu:
Advanced NMEA Setup
Advanced NMEA Setup Page
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