A compressed air submersible system for intensive scallop cultivation hanging facilities
1991
Matsumura, K. (Hokkaido. Government Office, Sapporo (Japan)) | Fujita, S. | Miyajima, K. | Yamashita, N.
A new apparatus has been developed to improve the operational safety and eliminate the labour needed for trimming the vertical location of the main line used in forced scallop cultivation hanging facilities. The apparatus could be used instead of the present manner of adding floats to compensate for the lack of buoyancy caused by the growth of scallops. The apparatus is composed of a compressed air supplier on board, a rubber hose and a soft shell type float (air bag) with an open mouth on the bottom and within the characteristic air valve. By remote controlling the air volume in the air bag with the air supplier on board, the main line can surface or relocate to designated depths. As expected the system's function and durability proved gratifying during the trials in the water tank and the cultivation nursery
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