The twin winged continuous-flow surface tow, referred to as MT in the CalCOFI database, samples ~8cm of the ocean surface, minimizing wake disturbance from the ship. The MANTA Net is an improved design from the Neuston Net and is capable of continuous-flow collection of organisms at the ocean surface.
The MANTA Net design and name derives from the surface-feeding Manta Ray because of it's paired, anterior extensions flanking the mouth that lends well for capturing organisms at the ocean surface. The frame is supported at the ocean surface by a pair of aquaplanes projecting at right angles from the paravanes. The net is towed by a wire yoke with one short bridle and one long bridle in order to angle the net from the ship. The parameters of towing speed, angle from the ship, and drag from the net affects the distance the net stays away from the ship while being towed. The construction of the net is nylon, nominally .505 mm square mesh with a 333µ cod end.
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Additional Information
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