DWO Cargo Operations & Stability 2

Question 1

A vessel's free surface effect is MOST critical when tanks are:

Accepted Answer

Partially filled

Answer

Partially filled tanks allow liquid to shift transversely, reducing the effective metacentric height and worsening stability.

Question 2

The stability document that shows the maximum allowable KG at various displacements is called a:

Accepted Answer

Limiting KG curve

Answer

The limiting KG curve (or maximum KG curve) plots the highest permissible center of gravity for each displacement to ensure adequate GM.

Question 3

When loading heavy cargo on deck, the PRIMARY stability concern is:

Accepted Answer

Raised center of gravity reducing GM

Answer

Deck cargo raises the vessel's center of gravity, reducing GM and potentially making the ship tender or unstable.

Question 4

A vessel lists to starboard during loading operations. The BEST corrective action is to:

Accepted Answer

Both A and B are correct

Answer

Either ballasting the low (port) side or shifting weight to the high (port) side will correct a starboard list; both methods are valid.

Question 5

The term 'angle of loll' refers to:

Accepted Answer

A stable equilibrium angle when GM is zero or negative

Answer

Angle of loll occurs when a vessel with negative or zero GM finds a new equilibrium position at a small angle of heel where GZ becomes positive.

(DWO) Deck Watch Officer Practice Test