Stablity Flashcards Preview

Boat Stability > Stablity > Flashcards

Flashcards in Stablity Deck (18)
Loading flashcards...
0

What is stability?

The tendency of a vessel to remain upright.

1

What is the center of gravity?

The point at which the weight of the boat acts vertically downwards.

2

What is buoyancy?

The upward force of the water displaced by the hull.

3

What is the center of buoyancy?

Is the point at which all upward vertical force is considered to act

4

What is equilibrium?

When the center of buoyancy is directed below the center of gravity

5

What is rolling?

Is the side to side motion of a boat

6

What is heeling?

Temporary leaning of a boat to one side caused by a change in the center of buoyancy

7

What is listing?

A permanent leaning of a boat to one side due to a shift in the center of gravity

8

What are the two types of stability?

Transverse and longitudinal

9

What is transverse?

Stability that tends to keep the boat from rolling over (capsizing)

10

What is longitudinal?

Stability that tends to balance the boat preventing it from pitching end over end. (Pitch poling)

11

What is moment?

The force that causes a vessel to return to an even keel or upright position.

12

What is righting moment?

The force causing a vessel to react against a roll and return to an even keel

13

What are the two forces that act on a boat?

Static and dynamic

14

What is static force?

Caused by the placement of weight within the hull

15

What is dynamic force

Caused by actions outside the hull such as wind and waves

16

What is free surface effect?

When a compartment of a vessel is only partially filled with liquid

17

Free communication with the sea

The unobstructed movement of seawater into and out of the vessel