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Squat prediction in muddy navigation areas
Delefortrie, G.; Vantorre, M.; Eloot, K.; Verwilligen, J.; Lataire, E. (2010). Squat prediction in muddy navigation areas. Ocean Eng. 37(16): 1464-1476. https://dx.doi.org/10.1016/j.oceaneng.2010.08.003
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258, more
Peer reviewed article  
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Keywords
    Harbours and waterways > Manoeuvring behaviour > Nautical bottom
    Harbours and waterways > Ship motion > Squat
    Models > Mathematical models
    Physical modelling
    Properties > Soil properties > Sinkage
    Sediments > Clastics > Mud
    Trim
Author keywords
    Mud; Sinkage; Trim; Mathematical model
Authors  Top 
Abstract
    Common squat prediction formulae to assess the navigation safety usually do not take into account the bottom condition. Nevertheless, the presence of a fluid mud layer is not an uncommon condition in confined areas where accurate squat predictions are necessary. From 2001 to 2004 an extensive experimental research program was carried out to measure the manoeuvring behaviour of deep drafted vessels in muddy areas. A part of the program focused on the undulations of the water–mud interface and their relationship to the ship’s squat. Mostly the sinkage of the ship is damped due to the presence of the mud layer, but a larger trim can occur due to the water–mud interface undulations. This article presents a mathematical model to predict the squat in muddy navigation areas.
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