The use of freeing ports to prevent the capsize of damaged ro-ro ferries

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Conference4th Canadian Marine Hydromechanics and Structures Conference : June 25-27, 1997, Ottawa
SubjectRo-Ro; ferries; solas
AbstractThis paper describes the results of a series of experiments on a simplified model of a 160m RO-RO ferry, after SOLAS damage. The model was a prismatic shape, primarily to allow for a direct comparison with numerical simulations. The model was tested for a range of residual freeboards from 0.5 to 1.5 metres, and a vertical centre of gravity range to cover values expected from typical existing ships and ships designed to meet SOLAS 90 regulations. The model was tested with and without a centreline casing and for a wide range of freeing port areas. Some tests were carried out with flapped covers on the freeing ports, to prevent water flowing onto the deck through the freeing ports, and some tests were carried out with permanently open freeing ports. For each condition, the highest waveheight that the model could survive and lowest waveheight that caused a capsize were determined.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number5333
NPARC number8895545
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Record identifierf6ba9eff-60d2-41f0-b830-1477b3694a5d
Record created2009-04-22
Record modified2016-05-09
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