Ship Construction and Cargo Flashcards

A vessel is said to be 'hogging' when:

Answer: The bow and stern are higher than amidships, causing the keel to arch upward

Hogging occurs when the middle of the ship is supported by a wave crest or heavy midships loading, causing the bow and stern to droop relative to amidships.

What is the purpose of a ship's 'accommodation ladder'?

Answer: To provide a portable stairway for boarding the vessel from a dock or water level

An accommodation ladder is a portable, adjustable stairway hung over the ship's side to allow personnel to board or disembark, especially at anchor.

Which type of hatch cover is opened by folding sections to the side or ends of the hatch?

Answer: Folding (piggyback) hatch cover

Folding or piggyback hatch covers open by folding their panels in a piggyback arrangement to one end or side of the hatch coaming.

In cargo stowage, 'separation' of incompatible goods is required primarily to:

Answer: Prevent dangerous chemical reactions or contamination between incompatible cargoes

Incompatible dangerous goods must be separated to prevent fire, explosion, or toxic reactions if they come into contact due to leakage or accident.

What is the 'deadweight tonnage' (DWT) of a vessel?

Answer: The total weight of cargo, fuel, stores, crew, and passengers that a vessel can carry

Deadweight tonnage is the total mass a ship can safely carry, including cargo, fuel, ballast, provisions, crew, and passengers.

What structural feature is designed to prevent a ship from rolling excessively in beam seas?

Answer: Bilge keel

Bilge keels are fins welded along the bilge (curved turn of the hull) that dampen rolling motion by increasing resistance to roll.

Which term describes the tendency of a vessel to turn her bow into the wind when underway?

Answer: Weather helm

Weather helm is the tendency of a vessel's bow to turn toward the wind, requiring corrective helm to maintain a straight course.