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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.
USS Monitor had had very little freeboard so as to bring the mass of the gun turret down, thereby increasing stability and making the boat a smaller and therefore harder target for gunfire. At the end of the American Civil War, the U.S. Navy Casco-class monitors had large ballast tanks that allowed the vessels to partially submerge during ...
They were low-freeboard, steam-powered ironclad vessels, with one or two rotating armored turrets, rather than the traditional broadside of guns. The low freeboard meant that these ships were unsuitable for ocean-going duties and were always at risk of swamping and possible loss, but it reduced the amount of armor required for protection.
The low freeboard of the galley meant that in close action with a sailing vessel, the sailing vessel would usually maintain a height advantage. The sailing vessel could also fight more effectively farther out at sea and in rougher wind conditions because of the height of their freeboard.
Often used incorrectly as a synonym for home port, meaning the port at which the vessel is based, but it may differ from the port of registry. port tack When sailing with the wind coming from the port side of the vessel. Vessels on port tack must give way to those on starboard tack. porthole. Also simply port.
Stern view of HMVS Cerberus at Williamstown, Victoria, Australia, in 1871.Note the low freeboard.. A breastwork monitor was a modification of the monitor, a warship which was first built in the United States in 1861, designed by John Ericsson and distinguished by the first rotating gun turret, designed by Theodore Timby.
AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...
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