STABILITY OF FISHING VESSEL 2

What is Stability?

Stability is the ability of a floating object to return to its initial upright position of stable equilibrium after being

disturbed by an outside force. In fishing vessels, stability is the ability of the vessel to return to its upright position after being heeled over by any combination of wind, waves, or forces from fishing operations. A fishing vessel is called stable when it has enough positive stability to counter the external forces generated by current weather and fishing conditions and will return toits upright position.

A fishing vessel is called unstable when it does not have enough positive stability to counter the external forces

generated by current weather and fishing conditions and capsizes. Whether a fishing vessel is stable or unstable depends on two key factors; the forces acting to capsize the vessel and the forces acting to right the vessel.  In the example below, the green line represents the total righting forces available and the red line is the total capsizing forces acting on the vessel from the weather, sea conditions, and fishing operations during its voyage.  As long as the forces available to right the vessel (the green line) are greater than the forces acting to capsize the vessel (the red line), the vessel will remain upright and is considered stable.  The instant the forces acting to capsize the vessel (the red line) are greater than the forces available to right the vessel (the green ine), the vessel will be unstable and capsize.

lovelymimiko@blogspot.com