Instruction manual

*$GPVTG: starts GPVTG sentence
l True course direction in degree related to the North.
l T fixed, means True Course
l Magnetic course direction in degree.
l M fixed, means Magnetic course
l Speed in knots=1.852Km/h.
l N fixed, means Knots.
l Ground speed in Km/h
l K fixed, means ground speed unit in Km
l *hh<CR><LF> check-sum and end of message
5-4-5 $GPZDA
One of NMEA-0183 formats. It contains date and time information only. EJ-41U can analyze
and re-structure this format.
The data contains the following information:
l $GPZDA starts GPZDA sentence
l Time/minutes/seconds in UTC.
l Date 01 – 31
l Month: 01-12
l Year in 4 digit. These are also shown in UTC
l Time zone: -13 to 00 to 13
l Time zone: 00 to 59 minutes
l *hh<cr><LF> check-sum and end of message
5-4-6 $GPRMC
One of NMEA-0183 formats. Date , time, latitude, longitude, moving speed and direction can be
detected. EJ-41U can analyze and re-structure this format.
The data contains the following information:
l Starts $GPRMC sentence.
l Hour/minutes/seconds in UTC
l The data status. [A] for valid data, [V] for invalid.
l Latitude in numbers
l N for north, S for South
l Longitude in numbers
l E for East, W for West
l Ground speed in knots.
l Direction in degrees
l Date in dd/mm/yy format.
l The difference of magnetic direction from true north.
l To which direction the magnetic direction differs. E toward east, W toward west.