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An overview of squat measurements for container ships in restricted water
Eloot, K.; Verwilligen, J.; Vantorre, M. (2008). An overview of squat measurements for container ships in restricted water, in: Varyani, K.S. (Ed.) International Conference on Safety and Operations in Canals and Waterways SOCW 2008, 15-16 September 2008, Glasgow, UK. pp. 106-116
In: Varyani, K.S. (Ed.) (2008). International Conference on Safety and Operations in Canals and Waterways SOCW 2008, 15-16 September 2008, Glasgow, UK. University of Glasgow/University of Strathclyde Glasgow: Glasgow. ISBN 978-0-947649-29-6. 276 pp.

Available in  Authors 
  • VLIZ: Open access 139630 [ download pdf ]
  • Waterbouwkundig Laboratorium: Congresverslagen V8 [139376]
  • Waterbouwkundig Laboratorium: Open Repository 251710 [ OWA ]
Document type: Conference paper

Keywords
    Navigation
    Topographic features > Channels
    Vehicles > Surface craft > Ships > Merchant ships > Container ships
    Water bodies > Inland waters > Canals
    ANE, Netherlands, Westerschelde [Marine Regions]
    Marine
Author keywords
    Squat

Authors  Top 
  • Eloot, K.
  • Verwilligen, J.
  • Vantorre, M.

Abstract
    Squat is an important issue for ships navigating with limited under keel clearance in restricted waterways such aschannels and canals. The admittance policy for containerships on the Western Scheldt, a tidal estuary in theNetherlands giving access to the port of Antwerp (Belgium), is based on a minimal static under keel clearance toensure safe passages on the river. A large number of captive model tests executed in the Towing Tank forManoeuvres in Shallow Water (co-operation Flanders Hydraulics Research - Ghent University) have beenevaluated to determine squat prediction formulae. Measured sinkage and trim depend on a number of parameterslike ship velocity components, ship loading condition, propeller action, blockage of the waterway, bankgeometries and characteristics of other shipping traffic. The derived mathematical models have beenimplemented in the ship manoeuvring simulators of FHR to visualize the dynamic under keel clearance duringreal-time simulations at different locations on the Western Scheldt.

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