STATIC STABILITY:-
1) It is defined as the ability of a ship to regain its upright equilibrium position, after the removal of external factor which caused the vessel to heel at an angle.
2) It gives the stability information of a vessel under the condition that the outside water is static.
3) It is expressed in terms of metacentric height. i.e. GM ( for angle of heel up to 10 degree) and righting lever GZ ( for angle of heel above 10 degree)
4) It’s unit is meter
5) Static stability at two different angle of heel can be the same.
DYNAMIC STABILITY:-
1) It is defined as the energy required heeling the ship from upright equilibrium till the angle of heel in question.
2) It gives the stability information of a vessel considering dynamic behavior of the sea.
3) It is expressed in terms of the area under righting moment curve. ( or GZ curve multiplied by displacement of the ship in tons)
4) It’s unit is ton-meter-radian
5) The dynamic stability at two different angle of heel cannot be the same
1) It is defined as the ability of a ship to regain its upright equilibrium position, after the removal of external factor which caused the vessel to heel at an angle.
2) It gives the stability information of a vessel under the condition that the outside water is static.
3) It is expressed in terms of metacentric height. i.e. GM ( for angle of heel up to 10 degree) and righting lever GZ ( for angle of heel above 10 degree)
4) It’s unit is meter
5) Static stability at two different angle of heel can be the same.
DYNAMIC STABILITY:-
1) It is defined as the energy required heeling the ship from upright equilibrium till the angle of heel in question.
2) It gives the stability information of a vessel considering dynamic behavior of the sea.
3) It is expressed in terms of the area under righting moment curve. ( or GZ curve multiplied by displacement of the ship in tons)
4) It’s unit is ton-meter-radian
5) The dynamic stability at two different angle of heel cannot be the same
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