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The anchor cable is commonly used by divers as a downline for ascent and descent. They may use granny lines from the entry point of the boat to the anchor cable as an aid for divers in currents, or low visibility. A basic granny line has a large, heavy shackle sliding over the anchor cable to tension it, and is tied off at the boarding area ...
A guy-wire, guy-line, guy-rope, down guy, or stay, also called simply a guy, is a tensioned cable designed to add stability to a freestanding structure. They are used commonly for ship masts , radio masts , wind turbines , utility poles , and tents .
A nautical cable is a band of tightly woven and clamped ropes, of a defined cable length, used during the age of sail for deep water anchoring, heavy lifting, ship to ship transfers and towing during blue sea sailing and other uses.
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Clewlines (green) and buntlines (red) for a single sail. The sail here is semi-transparent; fainter lines are running behind it. Clewlines and buntlines are lines used to handle the sails of a square rigged ship. The leechlines are clearly visible running inwards and upwards from the edges of the sail.
Reels for distance lines may have a locking mechanism, ratchet or adjustable drag to control deployment of the line and a winding handle to help keep slack line under control and rewind line. Lines are used in open water to deploy surface marker buoys and decompression buoys and link the buoy on the surface to the submerged diver, or may be ...
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By either hauling or easing the line, the tension in the luff can be changed, thereby shifting the point of maximum draft of the sail forward or aft respectively, optimizing sail shape and thus performance. It is a fine control which is used more frequently on racing sailboats than on cruising or day-sailing boats.