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2. Freeboard (nautical) - Wikipedia

   en.wikipedia.org/wiki/Freeboard_(nautical)

   In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. [1] In commercial vessels, the latter criterion measured relative to the ship's load line, regardless of deck arrangements, is the mandated and regulated meaning. [2]

3. Ship measurements - Wikipedia

   en.wikipedia.org/wiki/Ship_measurements

   Deadweight tonnage (DWT) is a measure of how much weight a ship can carry. [1] [2] [3] It is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew. [1] Draft or draught (d) or (T) – The vertical distance from the bottom of the keel to the waterline. Used mainly to determine the minimum water depth ...

4. Waterline - Wikipedia

   en.wikipedia.org/wiki/Waterline

   Waterline of a ship. The mark above the waterline indicates the Plimsoll line. The waterline is the line where the hull of a ship meets the surface of the water.. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position.

5. Waterline length - Wikipedia

   en.wikipedia.org/wiki/Waterline_length

   A vessel's length at the waterline (abbreviated to L.W.L) [1] is the length of a ship or boat at the level where it sits in the water (the waterline). The LWL will be shorter than the length of the boat overall (length overall or LOA) as most boats have bows and stern protrusions that make the LOA greater than the LWL. As a ship becomes more ...

6. Hull (watercraft) - Wikipedia

   en.wikipedia.org/wiki/Hull_(watercraft)

   Block measures that define the principal dimensions. They are: Beam or breadth (B) is the width of the hull. (ex: BWL is the maximum beam at the waterline) Draft (d) or (T) is the vertical distance from the bottom of the keel to the waterline. Freeboard (FB) is depth plus the height of the keel structure minus draft.

7. Leading lights - Wikipedia

   en.wikipedia.org/wiki/Leading_lights

   Leading lights, also known as range lights in the United States, are a pair of light beacons used in navigation [2] to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation. The beacons consist ...