WATSON INDUSTRIES GGC-E101 Owner's Manual - page 15
Watson Industries, Inc.
GGC-E101 Rev A 08/30/2013
15
7.
“s” is a single character representing the Longitude direction. s = E for East Longitude, s =
W for West Longitude. This data is followed by a comma.
8.
“zzz.zz” is a variable character string (minimum-4, maximum-6) representing the ground
speed. 0.00 to 999.99 knots. This data is followed by a comma.
9.
“ttt.tt” is a variable character string (minimum-4, maximum-6) representing the Track made
good, referenced to true North.. 0.00 to 359.99 degrees. This data is followed by a comma.
10.
“ddmmyy” is a six character string representing the UTC date of position fix. “dd” day,
”mm” month, “yy” year . This data is followed by a comma.
11.
“ddd.d” is a variable character string (minimum-3, maximum-5) representing Magnetic
Variation 0.0 to 180.0 degrees. This data is followed by a comma.
12.
“v” is a single character representing the Magnetic Variation direction. s = E for East
Longitude, s = W for West Longitude. This data is followed by a comma.
13.
“i” is a single character representing the Mode Indicator. i = A for Autonomous, i = D for
Differential, i = E for Estimated.
14.
“*cc” is a three character string representing an asterisk followed by a two digit
hexadecimal checksum.
15.
a short interval with no data transmission before the next string begins.
Example:
$GPRMC,175612.00,A,4451.84239,N,09128.00147,W,0.13,186.55,081210,0.8,W,D*39
$GPRMC
message Header
175612.00
Universal Time 21 Hrs 46 minutes 57.00 seconds
A
Status = valid data
4451.84239
latitude 44 deg 51.84043 minutes
N
North Lattitude
09128.00147
Longitude 91 deg 28.00263 minutes
W
West Longitude
0.13 Speed over ground 0.13 knots
Track Made Good 186.55 degrees
186.55
UTC Date of postion fix 08 December 2010
081210
Magnetic Variation 0.8 degrees
0.8
West Magnetic Variation
W
Mode indicator = Differential
D
*39
Checksum