NorthStar 8700, Technical Reference Manual

Page: 69 / 85

Section 10 - NMEA protocols
05/01/97 REV H PAGE 59
Table 43: Recommended-minimum-specific sentence
Example S:
$GPRMC,224512.45,G,2518.3847,S,08339.8367,E,003.8,311.5,080793,,*2E<CR><LF>
In this example, UTC is 22:45:12.45; status is Good; latitude is 25
°
18.3847' South; longitude is 083
°
39.8367' East; speed is 3.8 knots; head-
ing is 311.5
°
from North; and date is 08/07/93.
Track made good and ground speed ($GPVTG)
This message provides actual track made good and speed relative to the
ground.
Table 44: Track made good/ground-speed sentence
Data field Contents
$GPRMC,hhmmss.ss,A,llll.llll,a,yyyyy.yyyy,a,xxx.x,xx
x.x,xxxxxx,,*hh<CR><LF>
hhmmss.ss
UTC of position fix
A
Status. A = data valid; V = nav receiver warning
llll.llll
Latitude. Two digits of degrees and minutes, four dig-
its of decimal fraction of minutes.
a
N/S (North or South)
yyyyy.yyy
y
Longitude. Three digits of degrees; two digits of min-
utes; four digits of decimal fraction of minutes.
a
E/W (East or West)
xxx.x
Speed, in knots
xxx.x
Track (track made good, measured in clock-
wise-from-North direction, at the current position.
Range: 0 to 360
°
)
xxxxxx
Date (two digits for day, month, and year: ddmmyy)
Data field Contents
$GPVTG,xxx.x,T,,,xxx.x,N,xxx.x,K*hh<CR><LF
xxx.x
Track
T
Degrees true
xxx.x
Speed
N
Knots (speed, in number of)
xxx.x
Speed