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- Squat_effect abstract "The squat effect is the hydrodynamic phenomenon by which a vessel moving quickly through shallow water creates an area of lowered pressure that causes the ship to be closer to the seabed than would otherwise be expected. This phenomenon is caused when water that should normally flow under the hull encounters resistance due to the close proximity of the hull to the seabed. This causes the water to move faster, creating a low-pressure area with lowered water level surface (See Bernoulli's principle).This squat effect results from a combination of (vertical) sinkage and a change of trim that may cause the vessel to dip towards the stern or towards the bow.Squat effect is approximately proportional to the square of the speed of the ship. Thus, by reducing speed by half, the squat effect is reduced by a factor of four. Squat effect is usually felt more when the depth/draft ratio is less than four or when sailing close to a bank. It can lead to unexpected groundings and handling difficulties.It is believed to have been one of the causes of the 7 August 1992 grounding of the Queen Elizabeth 2 (QE2) off Cuttyhunk Island, near Martha's Vineyard. It is also known to have been a factor in the collision of the bulk carriers Tecam Sea and Federal Fuji in the port of Sorel, Quebec, in April 2000.At the time of the QE2's grounding she was reportedly traveling at 24 knots (12 m/s) and her draft was 32 feet (9.8 m). The rock upon which she grounded was an uncharted shoal later determined to be 34.5 feet (10.5 m), which should have given her room to spare, if not for the "squat effect." U.S. National Transportation Safety Board investigators found that the QE2's officers significantly underestimated the amount the increase in speed would increase the ship's squat. The officers allowed for 2 feet (0.61 m) of squat in their calculations, but the NTSB concluded that her squat at that speed and depth would have been between 4.5 and 8 feet (1.4 and 2.4 m).The second largest cruise ship in the world, Oasis of the Seas, used this effect as a contributing factor to pass under the Great Belt bridge, Denmark, 1 November 2009, on her voyage from the shipyard in Turku, Finland to Florida, USA. Without the presence of the squat effect, the ship wouldn't have been able to clear the bridge safely - the margin would have been very slight. However, travelling at 20 knots (37 km/h) in the shallow channel, Oasis experienced a 30 cm squat, allowing sufficient room to clear the bridge safely.".
- Squat_effect thumbnail Squat_hydrodynamic_phenomena-tag.svg?width=300.
- Squat_effect wikiPageID "15704954".
- Squat_effect wikiPageLength "4318".
- Squat_effect wikiPageOutDegree "29".
- Squat_effect wikiPageRevisionID "637597284".
- Squat_effect wikiPageWikiLink Bank_effect.
- Squat_effect wikiPageWikiLink Bernoullis_principle.
- Squat_effect wikiPageWikiLink Category:Fluid_dynamics.
- Squat_effect wikiPageWikiLink Category:Naval_architecture.
- Squat_effect wikiPageWikiLink Cuttyhunk.
- Squat_effect wikiPageWikiLink Cuttyhunk_Island.
- Squat_effect wikiPageWikiLink Denmark.
- Squat_effect wikiPageWikiLink Finland.
- Squat_effect wikiPageWikiLink Florida.
- Squat_effect wikiPageWikiLink Fluid_dynamics.
- Squat_effect wikiPageWikiLink Great_Belt_Fixed_Link.
- Squat_effect wikiPageWikiLink Hull_(watercraft).
- Squat_effect wikiPageWikiLink Knot_(unit).
- Squat_effect wikiPageWikiLink MS_Oasis_of_the_Seas.
- Squat_effect wikiPageWikiLink MV_Federal_Fuji.
- Squat_effect wikiPageWikiLink MV_Tecam_Sea.
- Squat_effect wikiPageWikiLink Marine_vessel.
- Squat_effect wikiPageWikiLink Marthas_Vineyard.
- Squat_effect wikiPageWikiLink National_Transportation_Safety_Board.
- Squat_effect wikiPageWikiLink Quebec.
- Squat_effect wikiPageWikiLink Queen_Elizabeth_2.
- Squat_effect wikiPageWikiLink RMS_Queen_Elizabeth_2.
- Squat_effect wikiPageWikiLink Seabed.
- Squat_effect wikiPageWikiLink Shipyard.
- Squat_effect wikiPageWikiLink Shoal.
- Squat_effect wikiPageWikiLink Society_of_Naval_Architects_and_Marine_Engineers.
- Squat_effect wikiPageWikiLink Sorel-Tracy.
- Squat_effect wikiPageWikiLink Sorel-Tracy,_Quebec.
- Squat_effect wikiPageWikiLink Turku.
- Squat_effect wikiPageWikiLink United_States.
- Squat_effect wikiPageWikiLink Watercraft.
- Squat_effect wikiPageWikiLink Waves_and_shallow_water.
- Squat_effect wikiPageWikiLink File:Squat_hydrodynamic_phenomena-tag.svg.
- Squat_effect wikiPageWikiLinkText "Squat effect".
- Squat_effect wikiPageWikiLinkText "effect of squat".
- Squat_effect wikiPageWikiLinkText "squat effect".
- Squat_effect hasPhotoCollection Squat_effect.
- Squat_effect wikiPageUsesTemplate Template:Convert.
- Squat_effect subject Category:Fluid_dynamics.
- Squat_effect subject Category:Naval_architecture.
- Squat_effect hypernym Phenomenon.
- Squat_effect type Disease.
- Squat_effect type Dynamic.
- Squat_effect type Mechanic.
- Squat_effect comment "The squat effect is the hydrodynamic phenomenon by which a vessel moving quickly through shallow water creates an area of lowered pressure that causes the ship to be closer to the seabed than would otherwise be expected. This phenomenon is caused when water that should normally flow under the hull encounters resistance due to the close proximity of the hull to the seabed.".
- Squat_effect label "Squat effect".
- Squat_effect sameAs Squat.
- Squat_effect sameAs Variación_del_calado_por_navegación_en_aguas_poco_profundas.
- Squat_effect sameAs Squat_(navire).
- Squat_effect sameAs Squat_(scheepvaart).
- Squat_effect sameAs m.03nqqr8.
- Squat_effect sameAs Squat.
- Squat_effect sameAs Q1753189.
- Squat_effect sameAs Q1753189.
- Squat_effect wasDerivedFrom Squat_effect?oldid=637597284.
- Squat_effect depiction Squat_hydrodynamic_phenomena-tag.svg.
- Squat_effect isPrimaryTopicOf Squat_effect.