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A vertical line inside a compass case indicating the direction of the ship's head.
Industry:Boat
A unit of speed: 1 nautical mile (1.8520 km; 1.1508 mi) per hour. Originally speed was measured by paying out a line from the stern of a moving boat. The line had a knot every 47 feet 3 inches (14.40 m), and the number of knots passed out in 30 seconds gave the speed through the water in nautical miles per hour.
Industry:Boat
A unit of length equal to 6 feet (1.8 m), roughly measured as the distance between a man's outstretched hands. Particularly used to measure depth.
Industry:Boat
A type of knot, producing a strong loop of a fixed size, topologically similar to a sheet bend. Also a rope attached to the side of a sail to pull it towards the bow (for keeping the windward edge of the sail steady).
Industry:Boat
A type of light centerboard that is lifted vertically; often in pairs, with the leeward one lowered when beating.
Industry:Boat
A type of bird that has little fear and therefore is particularly easy to catch.
Industry:Boat
a type of antipersonnel cannon load in which lead balls or other loose metallic items were enclosed in a tin or iron shell. On firing, the shell would disintegrate, releasing the smaller metal objects with a shotgun-like effect.
Industry:Boat
