APPENDIX 3 DIGITAL INTERFACE
AP-13
RMC - Recommended minimum specific GPS/TRANSIT datas
ROR - Rudder order status
ROT - Rate of turn
RPM - Revolutions
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a,a,a*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10
11 1213
1. UTC of position fix (000000 - 235959)
2. Status (A=data valid, V=navigation receiver warning)
3. Latitude (0000.00000 - 9000.0000)
4. N/S
5. Longitude (0000.00000 - 18000.0000)
6. E/W
7. Speed over ground, knots (0.00 - 99.94)
8. Course over ground, degrees true (0.0 - 360.0)
9. Date (010100 - 311299)
10. Magnetic variation, degrees E/W (0.00 - 180.0/NULL)
11. E/W
12. Mode indicator (A= Autonomous mode D= Differential mode S= Simulator
F=Float RTK P=Precise R=Real time kinematic E=Estimated (DR) M=Manual
13. Navigational status indication (S=Safe C=Caution U=Unsafe V=Navigational status not valid)
$**ROR, x.x, A, x.x, A, a*hh<CR><LF>
1 2 3 4 5
1. Starboard (or single) rudder order (-90 to 90.0)
2. Status (A=Valid V=Invalid)
3. Port rudder order (-90.0 to 90.0)
4. Status (A=Valid V=Invalid)
5. Command source location (B=Bridge P=Port wing S=Starboard wing
C=Engine control room E=Engine side/local W=Wing)
$--ROT,x.x,A*hh<CR><LF>
1 2
1. Rate of turn, deg/min, "-"=bow turns to port (-9999.9 - 9999.9)
2. Status (A=data valid, V=data invalid)
$ ** RPM, a, x, x.x, x.x, A*hh<CR><LF>
1 2 3 4 5
1. Source (S=shaft E=engine)
2. Engine or shaft number (00 to 99)
3. Speed, revolutions/min (-9999.99 to 9999.99)
4. Propeller pitch (-100.0 to 100.0)
5. Status (A=data invalid V=data valid)
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