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APPENDIX 3 DIGITAL INTERFACE
AP-26
HDT - Heading, true
MTW - Water temperature
MWV - Wind speed and angle
RMC - Recommended minimum specific GPS/TRANSIT data
$**GNS,hhmmss.ss,llll.lll,a,IIIII.III,a,c--c,xx,x.x,x.x,x.x,x.x,x.x,a*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 13
1. UTC of position (no use)
2. Latitude (0000.00000 - 9000.00000)
3. N/S
4. Longitude (0000.00000 - 18000.00000)
5. E/W
6. Mode indicator (P, R, D, F, A, E, M, S)
N=No fix A=Autonomous D=Differential P=Precise R=Real Time Kinematic
F=Float RTK E=Estimated Mode M=Manual Input Mode S=Simulator Mode
7. Total number of satellites in use (No use)
8. HDOP (0.00 - 999.99)
9. Antenna altitude, meters (-999.99 - 9999.99)
10. Geoidal separation (No use)
11. Age of differential data (0 - 99)
12. Differential reference station ID (No use)
13. Naivgational status indicator (S=Safe, C=Caution, U=Unsafe, V=Not valid)
$**HDT, xxx.x,T*hh<CR><LF>
1 2
1. Heading, degrees (0.00 to 360.00)
2. True (T)
$**MTW,x.x,C<CR><LF>
1
1. Water temperature, degrees C (-100.000 - 100.00
0
$**MWV,x.x,a,x.x,a,A*hh<CR><LF>
1 2 3 4 5
1. Wind angle, degrees (0.00 - 360.00)
2. Reference (R/T)
3. Wind speed (0.00 - 9999.99)
4. Wind speed units (K=km/h M=m/s N=nm)
5. Status (A)