Kongsberg DFT Water level datagram format
The proprietary DFT datagram contains the current water level (draft). The information is required to establish the offset of the transducer face relative to the vessel origin. A custom-built sensor may be required for this measurement.
Format
$KMDFT,xx.xx,*hh
Description
The depth is measured relative to the vessel’s origin.
•  KM: Talker identifier
•  DFT: Datagram identifier
•  xx.xx: Water level in metres
•  *hh: Checksum