Apparatus for towing an underwater instrumentation package

Details Apparatus for towing an underwater instrumentation package Apparatus for towing an underwater instrumentation package

1978-07-07

1979-11-27

Goldstein, Herbert

Measuring and testing

Meteorology

Electric disturbance

G01W 100

Patent

active

041754328

ABSTRACT:
Apparatus for towing an instrumentation "fish" in such a manner as to decouple it from vertical displacements of a towing vessel and tow line. The fish is secured to the tow line by a single pulley, on which it can move up and down the tow line, and upper and lower tethers are secured to the fish, and to upper and lower tether points on the tow line above and below the fish. Drag forces on the tethers provide a vertical restoring force on the fish, tending to maintain it in an equilibrium position between the upper and lower tether points. A wing on the fish provides substantial resistance to vertical heave, so that relatively rapid vertical movements of the tow line are heavily damped and have practically no effect on the fish.

REFERENCES:
patent: 3404565 (1968-10-01), Barry et al.
patent: 3906790 (1975-09-01), Brainard et al.
patent: 4010706 (1977-03-01), Pretet

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