Which term describes the vertical distance from the waterline to the top of the deck?

• A. Freeboard
• B. Draft
• C. Keel depth
• D. Waterline height

Answer: (A)

Freeboard is the vertical distance from the waterline to the top of the deck. This measurement shows how much of the hull remains above the water and is a key indicator of a vessel’s safety margin against waves and seas. It also factors into stability and buoyancy calculations, and is part of the ship’s load-line provisions that specify how much load a vessel can carry while staying within safe limits. The other terms describe different measurements: draft is how deep the hull sits in the water (from the waterline to the bottom of the hull), keel depth refers to the depth of the keel below the water or hull bottom, and waterline height isn’t a standard nautical term for this concept.