Large depth underwater survey drogue - with T-shaped profile and aqua planes at rear for maximum effect

摘要

The underwater survey drogue has a T-shaped profile with a shallow buoyancy 'wing' (1) at the top and a vertical central spine (2) on which the instruments are fitted. The rear of the spine is fitted with height (3) and steering (31) aquaplanes at a point where they exert a maximum moment on the craft. The buoyancy wind is trapezoidal for minimum drag. The towing cable is attached to the front of the plate, with a ballast keel (22) as a pipe along the bottom. The drogue is able to operate at large depths with minimum drag. The tow line need only be five times the operating depth.