Ship Construction and Cargo Flashcards

What is the purpose of a ship's cofferdam?

Answer: To separate two adjacent tanks and prevent leakage between them

A cofferdam is a void space between two adjacent tanks that prevents liquid from one tank leaking into the other.

Which structural member runs longitudinally along the bottom centerline of a ship and is considered its backbone?

Answer: Center keel

The center keel (or simply keel) is the primary longitudinal structural member running along the bottom centerline, forming the ship's backbone.

What term describes the cargo space below the main deck that is NOT a hold?

Answer: Deep tank

Deep tanks are enclosed spaces in the lower part of the ship used for liquid cargo or ballast, distinct from dry cargo holds.

The 'sheer' of a vessel refers to:

Answer: The upward curve of the deck from amidships toward the bow and stern

Sheer is the longitudinal curvature of the main deck, rising toward the bow and stern from the lowest point amidships.

Which type of cargo requires the most ventilation during stowage to prevent moisture damage?

Answer: Hygroscopic dry cargo such as grain or coffee

Hygroscopic cargo absorbs moisture from the air, so adequate ventilation is critical to prevent condensation and cargo sweat damage.

What is the function of bilge pumps on a vessel?

Answer: To remove accumulated water from the bilge spaces at the bottom of the hull

Bilge pumps remove water that collects in the bilge spaces, preventing flooding and maintaining watertight integrity.

Which document specifies the maximum load line (Plimsoll mark) for a vessel?

Answer: Load Line Certificate

The Load Line Certificate, issued under the International Load Line Convention, specifies the maximum draft marks for different sea zones and seasons.