C-Nav 1000 R4, Installation Manual

Page: 52 / 82

APPENDICES Page 46
VTG – Course over ground and ground speed
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K,a
Field Format Name Comment
1 --VTG Sentence Id
2 x.x
3 T Course over ground, degrees
true
4 x.x
5 M Course over ground, degrees
magnetic ‘x.x’ is null
field
6 x.x
7 N
Speed over ground, knots
8 x.x
9 K
Speed over ground, km/h
10 a Mode indicator
ZDA – Time and date
$--ZDA,hhmmss.ss,xx,xx,xxxx,xx,xx
Field Format Name Comment
1 --ZDA Sentence Id
2
hhmmss.
ss
UTC
3 xx Day (UTC)
4 xx Month (UTC)
5 xxxx Year (UTC)
6 xx Local zone hours Always zero
7 xx Local zone minutes Always zero
Output Sentences, Navigation
All output sentences use GP as talker identifier.
ALR – Alarm State
$--ALR,hhmmss.ss,xxx,A,A,c--c
Field Format Name Comment
1 --ALR Sentence Id
2
hhmmss.
ss UTC time of last condition
change
3 xxx Alarm identifier number
4 A Alarm condition
A = Threshold
exceeded, V =
not exceeded
5 A Acknowledge state
A =
Acknowledged,
V =
Unacknowledged
6 c--c Alarm description text
AAM – Waypoint arrival alarm
$--AAM,A,A,x.x,N,c--c
Field Format Name Comment
1 --AAM Sentence Id
2 A Status
3 A Status
4 x.x Arrival circle radius
5 N Units of radius, nautical
miles
6 c--c Waypoint ID