Neuston net apparatus

Details Neuston net apparatus Neuston net apparatus

1976-11-01

1978-04-04

Blix, Trygve M.

Ships

Towing or pushing

Submerged object

114244, 43 9, B60P 2156, B63B 2164, B63G 842

Patent

active

040820556

ABSTRACT:
A neuston net apparatus for guiding a net to be towed at the surface of a body of water. Dynamic lift provided by buoyant aquaplanes having trailing edges that are colinear with the top of a frame having a straight rigid top member defining the opening of the net, combines with the drag of the net to maintain the top of the net opening at the water surface when the apparatus is being towed, and thereby enables quantitative data to be obtained. Paravanes combined with an unbalanced bridle yoke steer the apparatus obliquely to the direction in which the apparatus is being towed, so as to steer the apparatus away from the influence of the towing vessel. A weighted tow line attached to the bridle yoke maintains the bridle yoke beneath the opening of the net so as not to scare sea creatures away from the opening and further prevents the net from leaping out of the water at wave tops.

REFERENCES:
patent: 1959793 (1934-05-01), Lafredo
patent: 2914878 (1959-12-01), Persson
patent: 3316670 (1967-05-01), Johnson
patent: 3482034 (1969-12-01), Rhoades
P. 91, Popular Mechanics, June 1945, "Seine."

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