An instrument-carrying capable of being towed at depths of a kilometer at speeds of 5-6 knots is described. The vehicle system can be operated from medium-sized vessels without special handling equipment. Cumbersome and expensive cable fairings generally considered necessary for deep and/or fast tows are unnecessary. A stream-driven propeller coupled to a hydraulic pump provides power for actuation of control surfaces. Control is by electrical command from the surface. Instruments including conventional STDs, velocimeters and a current meter have been fitted to the vehicle system. A smaller body is towed below the vehicle to provide a second platform for gradient measurements at fixed vertical separations. Depth is surface controllable over plus or minus 30 meters of nominal without the necessity for hauling-in or playing-out wire. Stability at any depth has been shown to be excellent. It has been possible to follow isodensity (isopycnic) surfaces continuously and track them in depth. (Author)


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    Titel :

    A Medium-Depth Controllable Towed Instrument Platform


    Beteiligte:
    F. R. Hess (Autor:in) / R. T. Nowak (Autor:in)

    Erscheinungsdatum :

    1975


    Format / Umfang :

    11 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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