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In sailing, a boom is a spar (pole), along the foot of a fore and aft rigged sail, that greatly improves control of the angle and shape of the sail. The primary action of the boom is to keep the foot flatter when the sail angle is away from the centerline of the boat. The boom also serves as an attachment point for more sophisticated control lines.
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 ...
A jibboom (also spelled jib-boom) is a spar used to extend the length of a bowsprit on sailing ships. [1] It can itself be extended further by a flying jib-boom . [ 1 ] The heel (i.e. rear and lower) end of the flying jib-boom is attached to the jib-boom, and the heel of the jib-boom to the bowsprit.
Below: a lower deck of the ship. [1] Belowdecks: inside or into a ship, or down to a lower deck. [13] Bilge: the underwater part of a ship between the flat of the bottom and the vertical topsides [14] Bottom: the lowest part of the ship's hull. Bow: front of a ship (opposite of "stern") [1]
A Chicago boom derrick is a derrick with a boom which is attached to an external structure. The external upright member of the structure serves as the mast, and the boom is stepped in a fixed socket clamped to the upright. The boom is connected to at least three pulley systems to control the position of the boom.
A Bentinck boom is fitted to the foot of the fore-course as a labour saving device when tacking. A small trading brig entering the Bristol Avon, painted by Joseph Walter. A brig is a type of sailing vessel defined by its rig: two masts which are both square-rigged. Brigs originated in the second half of the 18th century and were a common type ...
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Sail components include the features that define a sail's shape and function, plus its constituent parts from which it is manufactured. A sail may be classified in a variety of ways, including by its orientation to the vessel (e.g. fore-and-aft) and its shape, (e.g. (a)symmetrical, triangular, quadrilateral, etc.).