Stability – pp. 114-115/exercise 7

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# Stability – pp. 114-115/exercise 7 - PowerPoint PPT Presentation

Stability – pp. 114-115/exercise 7. A state of equilibrium Because also too much stability is undesired Balance (buoyancy and gravity must be equal) If a body, subject to a small disturbance from a state of equilibrium tends to return to that state

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Stability – pp. 114-115/exercise 7
• A state of equilibrium
• Because also too much stability is undesired
• Balance (buoyancy and gravity must be equal)
• If a body, subject to a small disturbance from a state of equilibrium tends to return to that state
• If, following the disturbance, the equilibrium is reduced even more
• When a body is immersed in a liquid, it will experience an upthrust that is equal to the weight of the displaced liquid
• External influences (wind, waves, water properties: density, kinematic viscosity, salinity) and internal influences or the human factor (HF), which include the action of the rudder when the ship is maneuvered and loading and discharging cargoes.
• Draft and trim.
• Salinity and temperature.
• Higher viscosity results in higher frictional resistance.
• “The action of the rudder when a ship is maneuvering” is an example of HF.