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DIGITAL INTERFACE
TLL - Target latitude and longitude
$--TLL,xx,llll.lll,a,yyyyy.yyy,a,c--c,hhmmss.ss,a,a*hh<CR><LF>
VTG - Course over ground and ground speed
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K,a*hh<CR><LF>
1. Course over ground, degrees true
2. Course over ground, degrees magnetic
3. Speed over ground, knots
4. Speed over ground, km/h
5. Mode indicator(see note)
6. Checksum
NOTE Positioning system Mode indicator:
S = Simulator
The positioning system Mode indicator field shall not be a null field.
A-16
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+-----+------------------------------ 3
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+----------------------------------------------------- 1
1. Target number 00 - 99
2. Latitude, N/S
3. Longitude, E/W
4. Target name
5. UTC of data
6. Target status(see note)
7. Reference target=R,null otherwise
8. Checksum
NOTE - Target status
L = lost,tracked target has beenlost
Q = query,target in the process of acquisition
T = tracking
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+--+----------- 4
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+--+----------------------------- 1
A = Autonomous
D = Differential
N = Data not valid
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| +----------- 7
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+------------- 6
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+-------------------- 5
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