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A hull is the watertight body of a ship, boat, submarine, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast. The line where the hull meets the water surface is called the waterline.
Also accommodation hull. A ship or hull used as housing, generally when there is a lack of quarters available ashore. An operational ship can be used, but more commonly a hull modified for accommodation is used. Act of Grace Act of Pardon A letter from a state or power authorising action by a privateer. See also letter of marque. action stations
Scantling is a measurement of prescribed size, dimensions, or cross sectional areas.. When used in regard to timber, the scantling is (also "the scantlings are") the thickness and breadth, the sectional dimensions; in the case of stone it refers to the dimensions of thickness, breadth and length.
The keel is at the very bottom of the hull, extending the entire length of the ship. The rear part of the hull is known as the stern, and many hulls have a flat back known as a transom. Common hull appendages include propellers for propulsion, rudders for steering, and stabilizers to quell a ship's rolling motion.
The bow (/ b aʊ /) is the forward part of the hull of a ship or boat, [1] the point that is usually most forward when the vessel is underway. The aft end of the boat is the stern. [2] Prow may be used as a synonym for bow or it may mean the forward-most part of the bow above the waterline.
The gunwale of an undecked boat. The gunwale (/ ˈ ɡ ʌ n əl /) is the top edge of the hull of a ship or boat. [1]Originally the structure was the "gun wale" on a sailing warship, a horizontal reinforcing band added at and above the level of a gun deck to offset the stresses created by firing artillery.
Hogging is the stress a ship's hull or keel experiences that causes the center or the keel to bend upward. Sagging is the stress a ship's hull or keel is placed under when a wave is the same length as the ship and the ship is in the trough of two waves.
A multihull is a boat or ship with more than one hull, whereas a vessel with a single hull is a monohull. The most common multihulls are catamarans (with two hulls), and trimarans (with three hulls). There are other types, with four or more hulls, but such examples are very rare and tend to be specialised for particular functions. [1]