*$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.
