Squat Interaction Manoeuvring

Author(s) The Nautical Institute
Publisher The Nautical Institute
Date 1995
Pages 57
Format pdf
Size 3 Mb







As it is clear from the title, this book is fully dedicated to the squat interaction; the interaction at sea has some resonances with same effects on land. For example, you must have noticed the sway that is usually felt when a car either passes or is passed by a large truck on a road, or the suction that is always created by high speed trains when they are passing through the stations as well as the ground effects usually experiences by the airplanes taking off/landing.

In the marine sphere, the interaction is commonly caused at the time of the interaction between the pressure fields around the vessels. All ships on the water are in a state of balance and they are held at rest by the hydrostatic pressures; once the vessels starts moving, the dynamic pressures are added. When the ship is moving through the calm water, the transverse and diverging wave systems are generated caused by the dynamic pressures.

When the pressure systems acting over the underwater hull of the vessel are affected in any was, the state of balance will change. The ship may go slower or faster, move off her course, rise on to the surface of the water, i.e. squat, or sink deeper into it. When a vessel moves from deep to shallow water, the closeliness of the seafloor will have direct effect on the ship hull pressures as the water gets more and more shallow...

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