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JLR-7700 MK2 GPS Navigator
Attachment 2-C NMEA0183 Output Sentence Data Format
1. Output sentences
RMC : Minimam specific GPS data
RMB : Minimam navigation information
APB : Autopilot sentence B
BWC : Bearing and distance to waypoint
GLL : Geographic position latitude/longitude
GGA : GPS fix data
VTG : Course over ground and ground speed
XTE : Cross-track error, measured
ZDA : Time and date
DTM : Datum reference
2. Output timing
GGA/RMB/RMC : Every two seconds
GLL/VTG/APB/BWC/XTE/ZDA : Every four seconds
RMC/GGA/GLL/VTG/ZDA/DTM : Every one seconds
3. Serial format
Baud rate : 4,800 bps
Data bit : 8 bits
Parity : None
Start bit : 1 bit
Stop bit : 1 bit
4. Data format
<Version 1.5>
RMC sentence
$GPRMC,hhmmss,A,llll.ll,a,yyyyy.yy,a,xx.x,xxx,ddmmyy,xx,a*hh<CR><LF>
1234 5678 9101112
1 : UTC time (hour, minute, and second)
2 : Status, A = Valid, V = Invalid
3 and 4 : Latitude (degree and minute), N/S
5 and 6 : Longitude (degree and minute), E/W
7 : Speed (knot)
8 : True course (degree)
9 : UTC (day, month, and year)
10 and 11 : Magnetic variation value, E/W
12 : Checksum
Caution
1. The sentences may not always be output in the order stated below. Therefore, it is necessary to adopt a
method that can ensure its positive retrieval regardless of its order if it is to be received.
2. It is necessary to adopt a method that can ensure retrieval of data with variable length since the length of
each sentence is variable.
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