NMEA Manual based on MediaTek chipset - Manual
FTX-HW-13002-A
Preliminary
Page 8 of 39
1.8
VTG – Course Over Ground and Ground Speed
Course and speed.
Example:
$GPVTG,0.00,T,,M,0.00,N,0.00,K,A*3D
Format:
$GPVTG,h.hh,T,m.m,M,s.ss,N,s.ss,K,M*hh<CR><LF>
Type
Description
h.hh
Heading in degrees.
T
Letter 'T' denoting True heading in degrees.
m.m
Magnetic heading in degrees.
M
Letter 'M' denoting Magnetic heading in degrees.
s.ss
Speed in knots.
N
Letter 'N' denoting speed in knots.
s.ss
Speed, km/h.
K
Letter 'K' denoting speed in km/h.
M
Mode indicator.
A=autonomous; N=data not valid
1.9
ZDA – Time and Date
Current UTC time and date.
Example:
$GPZDA,071850.000,31,08,2011,,*55
Format:
$GPZDA,hhmmss.ddd,dd,mm,yyyy,xx,yy*hh
Type
Description
hhmmss.ddd
UTC time in hours, minutes, seconds and fractions of a second.
dd
UTC day of month
mm
UTC month
yyyy
UTC year
xx
Local zone hours. Not implemented
yy
Local zone minutes. Not implemented
