51 to 75 scs1 100

Statical stability is the ability of a ship to return to the upright when inclined by an external source.

• True

• False

Reserve buoyancy may be defined as the volume of all the non-watertight enclosed spaces above the waterline, including deck structures.

• True

• False

The position of the metacenter will remain exactly the same over the entire life of the vessel.

• True

• False

The following factors affect a vessel's stability and contribute to the actual shape of the GZ curve in various load conditions: hull shape, reserve buoyancy, and on board weights.

• True

• False

Under its normal operating conditions, if a vessel has a draft forward of 12 feet and a draft aft of 14 feet, which statement below would accurately describe its condition of trim?

• The vessel has a 2 foot list by the stern

• The vessel is trimmed 2 feet by the stern

• The vessel is on an even keel and this is her normal condition

• The vessel has a one foot trim by the stern

Answer explanation

What is the greatest danger involved in overloading?

• A reduction in freeboard and the adverse effect of this on stability

• A greater possibility of structural damage by shipping heavy seas

• Injuries to crew members by shipping heavy seas

• None of the above

Metacentric height is the distance between:

• The keel and the center of gravity

• The keel and the center of buoyancy

• The keel and the metacenter

• The center of gravity and the metacenter

A fishing vessel is floating at its normal operating draft and is trimmed 3 feet by the stern. If the draft aft is 8 feet 9 inches, what is the forward draft?

• 5 ft. 9 in.

• 11 ft. 9 in.

• 8 ft. 9 in.

• 4 ft. 5.5 in.

How is the center of gravity affected if a weight is loaded, removed or shifted on a vessel?

• The C of G moves towards a weight removed

• The C of G moves away from a weight loaded

• When a weight is shifted within a vessel, the center of gravity is not affected

• The C of G moves in the same direction as, and parallel to, weights added or shifted

Which of the following statements is not correct regarding the movement of G?

• G will always move directly towards the center of gravity of a loaded weight

• G will move directly towards a discharged weight

• G will move parallel to a shifted weight

• G will move directly away from the center of gravity of a discharged weight