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NMEA Message Sets
Data Transfer
Your GPS receiver can be set to output GPS data in the NMEA 0183
format to interface with other marine devices.
The dataport must be turned on and the output message format
selected in SETUP.
NMEA DATA MESSAGES. NMEA data is output at the baud rate selected
in Setup, 8, N, 1, checksum off. These settings are acceptable to most
equipment and software applications.
There are several NMEA output message sets, each with a slightly different
application. Check the documentation for your external equipment to
select the appropriate message set.
SET OUTPUT/USAGE
0183A BWC, APA, GLL, VTG
Remote displays, version 1.x marine autopilots
0183B RMC, RMB
NMEA-recommended navigation data for remote map, etc.
0183C APB, GGA, BWC, GLL, VTG
Version 2.0 marine autopilot data and satellite data
NMEA Message Definitions
APA Autopilot cross track error, direction to steer, status of GPS, route
status, destination waypoint name, and bearing from origin to
destination (old format).
APB Revised autopilot message contains all of the above plus: heading
to steer toward destination, bearing from the present position
to the destination (magnetic or true).
BWC Range and bearing to a waypoint
GGA GPS position, time, fix quality, number of satellites used, HDOP
(Horizontal Dilution of Precision), differential reference
information, and age.
GLL GPS-derived latitude, longitude, and time of fix.
RMB Data status, cross track error, direction to steer, origin, destination
waypoint, waypoint location, bearing to destination, and velocity
toward the destination.