Trim and Stability Concepts

How is the metacentric height calculated?

• GM = BM + BG

• GM = BM - BG

• GM = BM x BG

• GM = BM / BG

What are the stability criteria for a ship?

• Positive metacentric height (GM), G below M, B above G

• Positive metacentric height (GM), G above M, B below G

• Negative metacentric height (GM), G above M, B below G

• Neutral metacentric height (GM), G above M, B above G

Explain the free surface effect on ship stability.

• The free surface effect on ship stability is the increase in stability caused by the movement of liquids within partially filled tanks on a ship.

• The free surface effect on ship stability is the complete elimination of stability caused by the movement of liquids within partially filled tanks on a ship.

• The free surface effect on ship stability is the enhancement of stability caused by the movement of solids within partially filled tanks on a ship.

• The free surface effect on ship stability is the reduction in stability caused by the movement of liquids within partially filled tanks on a ship.

What is a righting arm curve and how is it used in stability analysis?

• A righting arm curve is used to calculate the cargo capacity of a ship.

• A righting arm curve is a term used to describe the shape of a ship's hull.

• A righting arm curve is a measure of a ship's speed in calm waters.

• A righting arm curve is a graphical representation used in stability analysis to show the relationship between a ship's angle of heel and the righting arm, indicating its ability to return to an upright position.

Discuss the concept of damage stability in ship design.

• Damage stability in ship design is crucial to prevent catastrophic events by ensuring the ship remains afloat and stable even after damage.

• Damage stability is only relevant during calm weather conditions

• Damage stability is not important in ship design

• Damage stability only affects small vessels

What formula is used to calculate the metacentric height?

• GM = I / V

• GM = I + V

• GM = I * V

• GM = I - V

List the factors that affect the stability of a ship.

• Center of gravity, center of buoyancy, metacentric height, weight distribution, hull shape, external forces

• Material color, Engine size, Cabin layout

How does the free surface effect impact the stability of a ship?

• The free surface effect has no impact on the stability of a ship.

• The free surface effect increases stability by keeping liquids in place within tanks.

• The free surface effect decreases stability by reducing the ship's weight.

• The free surface effect reduces stability by allowing liquids to shift within partially filled tanks, increasing rolling motion.

Why is the righting arm curve important in analyzing ship stability?

• The righting arm curve measures the ship's cargo capacity

• The righting arm curve is used to determine the ship's speed

• The righting arm curve is important in analyzing ship stability because it shows how the ship's stability changes with increasing angles of heel.

• The righting arm curve indicates the ship's fuel efficiency

Explain the concept of intact stability.

• Intact stability is related to the ship's cargo capacity.

• Intact stability refers to the ship's speed in calm waters.

• Intact stability is the ability of a ship to return to an upright position after being heeled over by external forces.

• Intact stability is the ability of a ship to sink underwater.