Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page
17
of
58
VTG
–
Course Over Ground and Ground Speed Format:
1
2
3
4
5
6
7
8
9
# Description
Range
1-2.
True Course (degree)
“T” (meaning TRUE)
T
3-4.
Magnetic Direction
“M” (meaning Magnetic Direction)
M
Note: A null field is output unless magnetic direction information is available.
5-6.
Speed (kts)
“N” (meaning knot)
N
7-8.
Speed (km/h)
“K” (meaning km/h)
K
9.
Positioning System Mode Indication
A, D or N
“A”: Autonomous
“D”: Differential
“N”: Data Invalid
Example:
$GNVTG,0.00,T,,M,0.00,N,0.00,K,D*26
True Course: 0.00 degrees
Speed: 0.00 kts, 0.00 km/h Mode: Differential
ZDA
–
Time & Date Format:
1
2
3
4
5
6
#
1.
Description
UTC: Time
“hh”: hour
00 - 23
“mm”: minute
00 - 59
“ss.sss”: second
00.000 - 59.999
2.
UTC: Day of Month
01 - 31
3.
UTC: Month
01 - 12
4.
UTC: Year
1999 - 2099
△
3
5.
Local Zone Hours
(+/-) 00 - 23
6.
Local Zone Minutes
00 - 59
Example:
$GPZDA,014811.000,13,09,2013,+00,00*7B
UTC: 01:48:11.000 13th September, 2013
$XXVTG , x.x , T , x.x , M , x.x , N , x.x , K , a *hh <CR> <LF>
$XXZDA , hhmmss.sss , xx , xx , xxxx , xxx ,
xx *hh <CR> <LF>
