AP1.2 Configuration of NMEA Ver-3.00 Sentence
AP1-7
1.2.5 DBS - Depth below surface
$--DBS , x.x , f , x.x , M , x.x , F *hh<CR><LF>
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Contents Data Note
1 Water depth, feet
2 Water depth, meters
Depth below surface
3 Water depth, fathoms
1.2.6 DBT - Depth below transducer
$--DBT , x.x , f , x.x , M , x.x , F *hh<CR><LF>
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Contents Data Note
1 Water depth, feet
2 Water depth, meters
Water depth referenced to
the transducer.
3 Water depth, fathoms
1.2.7 DPT - Depth
$--DPT , x.x , x.x , x.x *hh<CR><LF>
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Contents Data Note
1
Water depth relative to the
transducer, meters
2 Offset from transducer, meters
Note 1:
“positive”= distance from transducer to
water-line.
“-”= distance from transducer to keel.
Note 2
For IEC applications the offset should
always be applied so as to provide depth
relative to the keel.
Water depth relative to
the transducer and
offset of the measuring
transducer.
3 Maximum range scale in use