A Closing, Multi-Sampling Net System for the Study of the Deep Scattering Layer
SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)
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A system has been devised to allow practically simultaneous biological sampling of the ocean at a number of different depths. It consists of a single rope from which are suspended a number of net frames that can be completely closed in quick succession by means of messengers. The system works satisfactorily at a towing speed of 3 knots and at depths down to 800 metres, and gives reliable results because the nets do not collect stray samples during descent or recovery.
- Biological Oceanography