Boat Stability Flashcards
What is a list?
A ship is said to be listed when the ship is inclined by forces on the ship, eg weight
What is a heel?
A ship is said to be heeled when it is inclined by exterior forces outside of the ship eg wind, waves
What is a loll?
Loll is when a ship is unstable in the upright position and it floats at an angle
What is the centre of gravity?
Is the point of which the weight of a whole body can be said to act vertically downwards
What is the centre of buoyancy?
Geometric centre of the underwater section of an object, buoyancy is considered to act vertically upwards
What happens to the centre of gravity when weight is added?
The centre of gravity moved towards wherever the weight is applied
When would a vessel become tender?
When weight is added to the top of a boat
When would a vessel become stiff?
When weight is added to the lower section of a vessel?
What is free surface effect?
Free surface effect is a mechanism which can cause a vessel to capsize, it refers to the tendency of liquids or small objects which move around and alter the stability in doing so. Eg Fuel, Sand,
Three suggestions for helping to preserve safe stability?
Keep partially filled tanks to a minimum
Freeing ports remain open to help drain water
Doorways in board are to remain locked
