The Ocean Hub project by the Institute of Marine Research uses Simrad EK60 scientific echo sounders in special water- and pressure proof housings.
The Simrad EK60 transceivers are mounted on the bottom of a Norwegian fjord at approximately 400 meters depth. The transducers are pointed upwards creating an acoustic fence to monitor the flux of herring to their winter habitat.
The echo sounders are connected to a remote land station using cables. From there, they are controlled, and data transferred, by means of a telemetry link.
A conceptual perspective of the Ocena Hub project. The transceivers create an acoustic fence.
In order to achieve maximum beamwidth, custom built transducers were used.
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