Question 1951 Deck Safety

The correct answer is B) bar securing a cargo port. A "strongback" refers to a bar that secures a cargo port or hatch cover on a vessel. It is used to provide additional strength and reinforcement to the cargo opening, preventing it from deforming or becoming damaged during cargo loading/unloading operations. The other answer choices are incorrect: A) A "deep beam" is a structural member that provides longitudinal strength to the hull of a vessel, but is not specifically a "strongback". C) A "centerline vertical bulkhead" is a structural partition running vertically through the center of the vessel, not a "strongback". D) A "spanner stay" is a supporting member used to brace masts or other vertical structures, not a "strongback".