Instrument: Knudsen 320 BR deepwater echosounder

Dataset: 
OC473 alongtrack
Instrument: 
Knudsen 320 BR deepwater echosounder
Instrument Short Name: Knudsen 320
Community Standard Description
(http://vocab.nerc.ac.uk/collection/L05/current/156/)
Instrument Description:

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.

PI supplied instrument name: Knudsen 320 BR deepwater echosounder
Dataset-specific description

Depth data was obtained from the Knudsen bathymetry system. Values have been corrected for transducer depth (4 meters). Bathymetric systems (3.5 kHz and 12.0 kHz) include: Knudsen 320B/R with digital data logging and EPC graphic recorder, Knudsen 3260 Chirp echsounder, Edo 323 B 12 kHz transducer, and an array of 12 3.5 kHz transducers.