Antifouling system for active ships at rest

Details Antifouling system for active ships at rest Antifouling system for active ships at rest

1976-05-03

1977-09-06

Blix, Trygve M.

Ships

Implements

Hull cleaning

B63B 2900

Patent

active

040460940

ABSTRACT:
A system for discouraging and inhibiting growth of the entire marine fouling community onto a ship hull while it is at rest in brackish or seawater. A pipe or pipes having nozzles distributed therealong, run the length of the keel. Fresh water is supplied to the pipe which flows out the nozzles and up along the hull to create and maintain a moving boundary layer of fresh water. Such movement also serves to inhibit fouling. An enclosure comprising segmented, over-lapping, opaque curtains hang down by weights, from the ship-deck. These curtains serve to prevent light from reaching the hull, and to protect the thin boundary layer of fresh water from the disruptive, mixing actions caused by the surrounding currents. Thus the marine fouling community, including tubeworms, barnacles, grass, and algae, may be inhibited from growing and adhering to the hull surface.

REFERENCES:
patent: 2138831 (1938-12-01), Brammer
patent: 3142283 (1964-07-01), Fisher
patent: 3241512 (1966-03-01), Green
patent: 3837916 (1974-09-01), Omachi
Runkel, S. T., "Black Plastic Sheets Control Pondweeds," Successful Farming, Sept., 1964, p. 98.

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