APPENDIX 3 DIGITAL INTERFACE
TRD - thruster data response
$**TRD,x,x.x,a,x.x,a,x.x*hh<CR><LF>
1 2 3 4 5 6
1. Number of thruster, bow or stern (01 to 99)
2. RPM response (-999.9 to 999.9)
3. RPM mode indicator (P=per cent R=revolutions per min
V=data invalid)
4. Pitch response value (-999.9 to 999.9)
5. Pitch mode indicator (P=per cent D=degree V=data invalid)
6. Azimuth response (000.0 to 359.0, Null)
TTD - Tracked Target Data
!**TTD,xx,xx,x,s--s,x*hh<CR><LF>
1 2 3 4 5
1. Total hex number of sentences need to transfer the message (1 to FF)
2. Hex sentence number (1 to FF)
3. Sequential message identifier (0 to 9)
4. Encapsulated trancked target data (6 bit binary-converted data)
5. Number of fill bits (0 to 5)
TTM - Tracked target message
$**TTM,05,12.34,23.4,R,45.67,123.4,T,1.23,8.23,N,c--c,T,R,hhmmss.ss,M*hh<CR><LF>
1
2
3
1. Target number (00 to 999)
2. Target distance from own ship (0.000 - 99.999)
3. Bearing from own ship,degrees (0.0 - 359.9)
4. True or Relative (T)
5. Target speed (0.00 - 999.99, null)
6. Target course, degrees (0.0 - 359.9, null)
7. True or Relative
8. Distance of closet point of approach (0.00 - 99.99, null)
9. Time to CPA, min., "-" increasing (-99.99 - 99.99, null)
10. Speed/distance units (N=nm)
11. Target name (null)
12. Target status (L=Lost Q=Acquiring T=Tracking)
13. Reference target (R, NULL otherwise)
14. UTC of data (null)
15. Type of acquisition (A=Automatic M=Manual )
VBW - Dual ground/water speed
$**VBW,x.x,x.x,x,x.x,x.x,x,x.x,x,x.x,x,*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10
1. Longitudinal water speed, knots (-9999.999 - 9999.999)
2. Transverse water speed, knots (-9999.999 - 9999.999, null)
3. Status: water speed, A=data valid V=data invalid
4. Longitudinal ground speed, knots (-9999.999 - 9999.999)
5. Transverse ground speed, knots (-9999.999 - 9999.999, null)
6. Status: ground speed, A=data valid V=data invalid
7. Stern transverse water speed, knots (-9999.999 - 9999.999)
8. Status: stern water speed, A=data valid V=data invalid
9. Stern transverse ground speed, knots (-9999.999 - 9999.999)
10. Status: stern ground speed, A=data valid V=data invalid
AP-26
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