In a rough sense, directional stability or instability can be determined by examination of the ship's underwater profile. If the area of the hull and its appendages is concentrated toward the aft end, then the ship is likely to be directionally stable. Dynamic stability refers to the vessels ability to resist forces in the "X" axis, or roll. The effect when the ship is heeled to a small angle 0 is shown in Figure 7.1(b). No weights have been moved within the ship, therefore the position of G is not affected. The centre of buoyancy will move out to the low side indicated by BB1. Moment of statical stability = W X GZ. b= buoyancy b= buoyancy. Fig. 7.1 'Ship stability' is the ability of a ship to return to a balanced location without capsizing when the ship is subjected to external forces or external moments (Francescutto, 2016). It is concerned with 'Static stability', 'Dynamic stability', 'Damaged stability' and 'Free surface' (Vassalos, 2000). What is Aircraft Stability? The stability of a plane can be described as its tendency to remain flying straight and level. There are two types of stability — static and dynamic. Static stability is an aircraft's resistance to being disturbed from its flight path. Think of an airliner flying at altitude. Abstract and Figures. Aerodynamic support is beneficial for achieving very high speeds of marine transportation. Wing-in-ground vehicles, power-augmented-ram platforms, and ultra-fast planing The vertical/Z axis, or yaw axis, is an imaginary line running vertically through the ship and through its centre of mass.A yaw motion is a side-to side movement of the bow and stern of the ship. The transverse/Y axis, lateral axis, or pitch axis is an imaginary line running horizontally across the ship and through the centre of mass. A pitch motion is an up-or-down movement of the bow and Gyroscope. A gyroscope in operation, showing the freedom of rotation in all three axes. The rotor will maintain its spin axis direction regardless of the orientation of the outer frame. A gyroscope (from Ancient Greek γῦρος gŷros, "round" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and OiJF.

what is dynamic stability of ship