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Description of fields
Examples
A.15
Syntax
Description of fields
74
Field
Description
$--RMC
Header including talker ID
hhmmss.ss
UTC time of position fix
A
Status
A = Data valid
V = Navigation instrument warning
llll.ll
Latitude (WGS 1984)
a
Hemisphere, North or South
yyyyy.yy
Longitude (WGS 1984)
a
East or West
x.x
Speed over ground in knots
x.x
Course over ground in degrees
xxxxxx
Date: ddmmyy
x.x
Magnetic variation in degrees
a
East or West
*hh
Mode Indicator
A = Autonomous mode
D = Differential mode
N = Data not valid
<CR>
Carriage Return
<LF>
Line Feed
For NMEA v4.0 and v4.1:
Standard Talker ID = GPS only and GNSS
$GNRMC,154706.00,A,4724.5288205,N,00937.0842621,E,0.01,144.09,14111
4,0.00,E,A*10
VTG - Course Over Ground and Ground Speed
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF>
Field
Description
$--VTG
Header including talker ID
x.x
Course over ground in degrees true north, 0.0 to 359.9
T
Fixed text T for true north
x.x
Course over ground in degrees magnetic North, 0.0 to 359.9
M
Fixed text M for magnetic North
x.x
Speed over ground in knots
N
Fixed text N for knots
x.x
Speed over ground in km/h
K
Fixed text K for km/h
a
Mode Indicator
NMEA Message Formats
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