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Appendix 5: Digital Interface
AP-53
DTM - Datum reference
Recipient of sentences:
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$--DTM,ccc,a,x.x,a,x.x,a,x.x,ccc*hh<CR><LF>
| | | | | | | | |
| | | | | | | | +--- 7
| | | | | | | +------ 6
| | | | | | +---------- 5
| | | | +--+------------- 4
| | +---+------------------- 3
| +------------------------- 2
+---------------------------- 1
1. Local datum W84
- WGS84
W72
- WGS72
S85
- SGS85
P90
- PE90
999
- User defined
IHO datum code
2. Local datum subdivision code
3. Lat offset, min, N/S
4. Lon offset, min, E/W
5. Altitude offset, m
6. Reference dattum W84 - WGS84
W72 - WGS72
S85 - SGS85
P90 - PE90
7. Checksum
DBS - Depth below surface
$--DBS,x.x,f,x.x,M,x.x,F*hh<CR><LF>
| | | | | | |
| | | | | | +--------- 4
| | | | +--+----------- 3
| | +--+----------------- 2
+--+---------------------- 1
1. Water depth, feet
2. Water depth, m
3. Water depth, fathoms
4. Checksum