Kongsberg Simrad EK80, Installation Manual

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Supported datagram formats for water level offset
information
Many factors can cause the ship's draft to change. The amount of fuel, cargo or ballast
may greatly influence the draft. Varying water temperatures and salinity will also have
an effect. Draft changes will make any sensor move vertically on the X-axis when
referenced to the sea surface. To keep measurements accurate, the location of the water
line must therefore be monitored.
The EK80 supports the following datagram format for water level offset information:
•
DFT Water Level
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.
Related topics
Interface specifications, page 281
Technical specifications, page 279
Supported formats for processed data to output
The EK80 can export several types of processed data to a communication port. Use
Processed Data to Output
to define which processed data formats to export, and which
communication port to use. This page is located in the
Output
dialog box.
The following formats are supported:
•
XYZ file format
This is processed and interpolated "xyz" data in ASCII format. The XYZ datagram is
a navigational datagram showing the position and depth of a single channel.
•
ZMQ Beam Velocity
ZMQ Beam Velocity identifies the datagram format used to export data to the
UHDAS (University of Hawaii Data Acquisition System) processing software. The
UHDAS processing software uses the ZMQ Beam Velocity (Zero Message Queue)
datagram format to set up sockets and communication. For more information about
the proprietary UHDAS format, visit
currents.soest.hawaii.edu/uhdas_home .
•
NMEA DBS
The NMEA DBS datagram provides the current depth from the surface. The datagram
is no longer recommended for use in new designs. It is frequently replaced by the
NMEA DPT datagram format.
•
NMEA DBT
The NMEA DBT datagram provides the current depth under the transducer. In new
designs, this datagram format is frequently used to replace the DBK and DBS formats.
Technical specifications