Posts Tagged ‘boat design’

PostHeaderIcon Sled

slang for an ultra-light displacement (ULDB), open-cockpit racing boat. Its hull shape is designed to develop positive dynamic pressure, so that its draft decreases with increasing speed. Given enough driving force, a sled can achieve higher speeds than a similarly sized displacement-hull boat, as it is less limited by waterline length. Called a sled because it is long, narrow, and specifically designed to slide downhill on mountains of blue water during races such as the Transpac. The Santa Cruz line of boats, designed by the “Wizard,” Bill Lee, are a good example. Older sleds that are modified with such upgrades as a taller, carbon mast and larger sails are referred to as turbosleds. See also: turbo-ing.

PostHeaderIcon LWL

Length of Loaded Waterline. A boat’s length as measured along her waterline; i.e., from the point at which the bow exits the water to the point at which the stern exits the water. It does not include any part of the rudder that may protrude aft of the hull. LWL is measured when the boat is loaded with all equipment, crew and ballast that she would use during a race. With most boat designs, LWL increases as the boat’s draft increases due to the weight of additional stores and equipment, and also increases as her heel angle increases. See also: displacement and hull speed. Compare to: LOA.

PostHeaderIcon Inclining

short for inclining measurement, a stability test used to determine the vertical center of gravity of a boat and its ability to remain upright or return to its normal upright position after weight movement, waves, wind, etc. heel it over. See also: BLRI and STIX.

PostHeaderIcon Transom

a stern’s aft face. Modern race boats are designed with an open or scoop transom, which allows any water taken in over the stern or sides to drain away.

PostHeaderIcon Mast Partners

a structure that reinforces the deck opening through which a keel-stepped mast passes. See also: partners.

PostHeaderIcon Mast Rails

the stainless steel tubing that forms a safety rail for a crew member working at the mast. One mast-rail design uses vertical supports and waist-high horizontal rails on a single plane, in an L-shape or semi-circle. Other configurations are also possible. Also called a mast pulpit or sissy bars. See also: bow pulpit and stern pulpit.

PostHeaderIcon Chain Plates

the metal plates to which shrouds, lines, and stays are attached. These plates are located on either side of the deck near the beam and are attached to the hull. Also referred to as deck plates.

PostHeaderIcon Chafe

the damage to one object caused by rubbing against another object. See also: chafing gear.

PostHeaderIcon Non-skid

a surface preparation that provides traction on decks and stairs under both wet and dry conditions. Non-skid comes as paint or sheets applied to hard surfaces, or as patterns molded into the surface.

PostHeaderIcon Berth

1) A place to sleep onboard a boat. See also: pilot berth, pipe berth, quarter berth, sea berth, settee, and v-berth. 2) A location in a harbor to secure a vessel, such as a dock or moor. 3) A safe and cautious distance, as in “a wide berth.” British and Commonwealth sailors use berth to mean position, as in “the inside berth at the mark.”


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