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Possible remedies for intact stability hazards involving contemporary small inland passenger ferries in Bangladesh
Authors:Kho Shahriar Iqbal  Gabriele Bulian  Kazuhiko Hasegawa  Md Mashud Karim  Zobair Ibn Awal
Institution:1. Hasegawa Laboratory, Department of Naval Architecture and Ocean Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
2. Department of Naval Architecture and Marine Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
3. Department of Naval Architecture, Ocean and Environmental Engineering, University of Trieste, Trieste, Italy
4. Accident Research Centre, Bangladesh University of Engineering Technology, Dhaka, Bangladesh
Abstract:On the basis of previous studies, a series of hazards involving the typical small inland passenger ferries operating in inland Bangladeshi waters have been identified. In particular, stormy weather conditions, overloading, and the risk of crowding to one side have been determined as the typical events that are likely to lead to capsizing in the intact condition. In this article, possible hazard mitigation measures are discussed, both from the regulatory and from the design point of view, for a small inland ferry that is very similar to one that actually capsized in the past. The addressed design options involve ballasting and hull modification by means of additional buoyancy above the waterline. From a regulatory point of view, it is proposed that the present weather criterion in force in Bangladesh be modified by increasing the wind speed to be accounted for and by considering the concurrent effects of wind, rolling, and the crowding of people to one side.
Keywords:Transport safety  Inland water transport  Passenger ferry  Intact stability  Additional buoyancy  Hazard identification  Weather criterion
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