S A N J O S E N A V I G A T I O N , I N C .
P r o f e s s i o n a l i n N a v i g a t i o n & C o m m u n i c a t i o n
S
S
A
A
N
N
J
J
O
O
S
S
E
E
N
N
A
A
V
V
I
I
G
G
A
A
T
T
I
I
O
O
N
N
,
,
I
I
N
N
C
C
.
.
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TEL: 886-2-26879500
FAX: 886-2-26878893
WWW.SANAV.COM
29
ISO 9001
NO. T2000-351
8.6 $GPVTG (out) – Course and speed
Example
$GPVTG ,012.3,T ,001.1,M ,001.2,N ,0002.2,K
,A
*10
CR
LF
Field#
1 2
3 4
6
7 8
9
10
#. Description
Range
[Bytes]
1-2. True Course
“012.3”
“T” (meaning TRUE)
000.0-359.9
T
[5] (degree)
[1] (n/a)
Note: A null field is output unless true course information is available.
3-4. Magnetic Course
“001.1”
“N” (meaning MAGNETIC)
000.0-359.9
M
[5] (degree)
[1] (n/a)
Note: A null field is output unless magnetic course information is available.
5-6. Speed (kts)
“001.2”
“N” (meaning kNot)
000.0-999.9
N
[5] (kts)
[1] (n/a)
Note: A null field is output unless speed course information is available.
7-8. Speed (km/h)
“0002.2”
“K” (meaning Km/h)
0000.0-9999.9
K
[6] (km/h)
[1] (n/a)
Note: A null field is output unless speed course information is available.
9. Positioning System Mode Indicator
A: Autonomous mode [1]
D: Differential mode
N: Data not valid
10. Checksum
[2]
