10. Appendix
10-6
2: Water depth, meters
3: Water depth, fathoms
4) DBS – Depth below surface
$--DBS, x.x, f, x.x, M, x.x, F*hh<CR><LF>
1 2 3
1: Water depth, feet
2: Water depth, meters
3: Water depth, fathoms
5) PJRCU – Depth relative to transducer (2frequencies)
$PJRCU,SD,x.x,x.x,x.x,x.x,xx,c-c*hh<CR><LF>
1 2 3 4 5 6 7
1: Water depth relative to transducer, meters.
2: Offset from transducer, meters
3: Maximum range scale in use, meters
4: Reserved
5: Echo sounder channel number 1: reserved 2:50 kHz 3: 200 kHz
6: Transducer location FWD/MID/AFT
7: Checksum (result after each ASCII code of every character between "S" just after "$" and
"X" just before " * " is EXORed.)
6) ALR – Set alarm state(Legacy Alert sentece)
$--ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
1 2 3 4 5
1: Time of alarm condition change, UTC
2: Alarm condition (A = threshold exceeded, V = not exceeded)
3: Unique alarm number (identifier) at alarm source
4: Alarm’s acknowledge state, A = acknowledged V = unacknowledged
5: Alarm’s description text
7) ALC – Cyclic alert list
$--ALC,xx,xx,xx,x.x,aaa,x.x,x.x,x.x,……..,aaa,x.x,x.x,x.x*hh <CR><LF>
1 2 3 4 5 6 7 8 9 10
1: Total number of sentences for this message, 01 to 99 1
2: Sentence number, 01 to 99 1)
3: Sequential message identifier, 00 to 99 2)
4: Number of alert entries 3)
5: Manufacturer mnemonic code
6: Alert identifier
7: Alert instance
8: Revision counter
9: Additional Alert entries
10: Alert entry n 4)
Note;
1) The first field specifies the total number of sentences used for a message, minimum value
1. The second field identifies the order of this sentence in the message, minimum value 1.
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