Underwater acoustic instrumentation for investigating deep scattering layer

Natarajan, S and Girijavallabhan, K G and Rajagopalan, M S (1996) Underwater acoustic instrumentation for investigating deep scattering layer. In: Proceedings of the Second workshop on scientific results of FORV Sagar Sampada, 15-17 February 1994, Kochi.



The instruments used for the DSL studies were scientific echo-sounder for detection, Isacc's Kid Midwater trawl for sampling mesopelagics and the trawl sonde to lower the IKMT to the exact depth at which the DSL appeared. Opening of the IKMT and the temperature of the seawater at which the DSL appeared was also recorded on the trawl sonde system. The echoscope connected to the echosounder showed the DSL in different colours depending upon its density. The continuous monitoring on echogram revealed that the DSL observed at surface during night and at 600 m depth during day.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Underwater acoustic instrumentation; investigation; deep scattering layer
Subjects:Oceanography > Acoustics
Divisions:CMFRI-Cochin > Marine Capture
ID Code:5231
Deposited By:Arun Surendran
Deposited On:20 Oct 2010 11:52
Last Modified:20 Oct 2010 12:13

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