Navman 11 - Manual (Page 53)

53 MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Message ID: VTG (while receiver is in navigation mode -- Note 1)
Rate: Variable
Fields: 8
Field No. Symbol Field description Field type Example
$__VTG Start of sentence and address field $GPVTG
1 TRU_CRS Course over ground, degrees true x.x 291.3
2 T True course indicator t T
3 MAG_CRS Course over ground, degrees magnetic x.x 277.3
4 M Magnetic course indicator m M
5 SPD_N Speed over the ground (knots) x.x 0.784
6 N Nautical speed indicator (N = knots) n N
7 SPD_K Speed (km) x.x 1.452
8 K Speed indicator (K = km/hr) k K
CKSUM Checksum *hh *4F
Sentence terminator
Note 1: Output of this message is temporarily suppressed while the receiver is in acquisition mode.
Table 3-52. VTG message (course over ground and ground speed)
3.6.1.8 Course over ground and ground speed
(VTG).
This message contains the course over ground
(true and magnetic) and speed relative to the
ground. The contents of the ‘VTG’ message are
described in Table 3-52.
Sample message:
$GPVTG,291.3,T,277.3,M,0.784,N,1.452,K*4F