Installation Manual

APPENDIX 2 DIGITAL INTERFACE
AP-8
GNS - GNSS fix data
HBT - Heart beat supervision
HDT - Heading - true
LRF - Long-range function
$**GNS,hhmmss.ss,llll.ll,a,IIIII.II,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 (0.00 to 235959.99)
2. Latitude (0.00000
to 9000.00000)
3. N/S
4. Longitude (0.00000
to 18000.00000)
5. E/W
6. Mode indicator (A=Autonomous, D=Differential, E=Estimated Mode, F=Float RTK, M=Manual
Input Mode,N=No fix, P=Precise, R=Real Time Kinematic, S=Simulator Mode)
7. Total number of satellites in use (Not used)
8. HDOP (Not used)
9. Antenna altitude, meters (Not used)
10. Geoidal separation (Not used)
11. Age of differential data (Not used)
12. Differential reference station ID (Not used)
13. Navigational status indicator (S=Safe; C=Caution; U=Unsafe; V=Not valid)
$--HBT, x. x, A, x*hh<CR><LF>
1 2 3
1. Configured repeat interval (1 to 999, NULL)
2. Equipment status (A/V)
3. Sequential sentence identifier (0 to 9, NULL)
$**HDT, xxx.x,T*hh<CR><LF>
1 2
1. Heading, degrees (0.000 to 359.999)
2. True (T, NULL)
$**LRF,x,xxxxxxxxx,c--c,c--c,c--c*hh<CR><LF>
1 2 3 4 5
1. Sequence number (0
to 9)
2. MMSI of requester
3. Name of requester (1
to 20 characters, NULL)
4. Function request
(1
to 26 characters (Preceded by A, B, C, E, F, I ,O, P, U, W), NULL)
A : Ship’s name, call sign and IMO No.
B : Date and time of message composition
C : Position
E : Course Over Ground
F : Speed Over Ground
I : Destination and Estimated Time of Arrival (ETA)
O : Draught
P : Ship/Cargo
U : Ship’s length, breadth and type
W : Persons on board
5. Function reply status
(1 to 26 characters (Preceded by 2, 3, 4), NULL)
2: Information available and provided in the following LR1, LR2, LR3 sentence;
3: Information not available from AIS unit;
4: Information is available but not provided (i.e. restricted access determined by the ship’s master)