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The upgrading of a Mermaid underwater vehicle
de Haan, D. (1993). The upgrading of a Mermaid underwater vehicle. ICES Mar. Sci. Symp. 196: 140-142
In: ICES Marine Science Symposia. ICES/Reitzel: Copenhagen. ISSN 0906-060X, meer
Beschikbaar in  Auteur 
Trefwoorden
    Behavioural responses
    Equipment > Fishery industry equipment > Fishing gear
    Fishery sciences
    Gear research
    Nets > Fishing gear > Fishing nets > Trawl nets
    Surveys > Environmental surveys
    Underwater vehicles
    Viewing underwater
    Marien/Kust
Auteur  Top 
Abstract
    Dutch research on development of direct observation techniques started with the purchase of an underwater towed vehicle of type "Mermaid Explorer" in 1985. Targets for further development were observation of a wider range of fishing gears, with speeds up to 7 knots, and inspections of the marine environment requiring low-speed operation. A feasibility analysis showed the potential of an increase in magnus rotor performance. The single towing mode will be extended by a propelling mode (hovering mode). The two modes are to be interswitched without paying back. Performance measurements on several rotor configurations were conducted as part of the vehicle design process. A cross lay-out with four rotors reached the greatest depth in the shortest amount of time. A spherical rotor appeared to be ineffective.
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