Instrument: Knudsen 320 BR deepwater echosounder
The Knudsen 320 B/R deepwater echosounder is a digital data logging system used to measure water depth (e.g. depth of the seafloor). The system is configured to work with different frequency transducers. For example, the Edo 323 B is a 12 kHz High Frequency (HF) transducer or it can be configured to work with an array of 3.5 kHz Low Frequency (LF) transducers mounted in the hull of a vessel.
Knudsen 320B/R with digital data logging and EPC graphic recorder. 12 kHz and 3.5 kHz transducers are 5 meters below the surface.