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Shade sail over playground in Australia. A shade sail − or somewhat more precise a textile sunshade sail or a textile sun protection sail − is a device to create outdoor shade based on the textile basic technology that can be found in a ship's sail. [1] Shade sails use a flexible membrane tensioned between several anchor points. While ...
Two primary sail control lines are attached to every boom: The outhaul runs from the clew of the sail to the free end of the boom. Hauling in on (tightening) the outhaul increases foot tension in the main sail. Modern loose footed sails are cut so that the outhaul is also able to pull the clew downwards towards the boom.
Tripod mast, as here on USS Texas, were strong enough to carry heavy equipment such as searchlights, radar and the spotting top high up. The tripod mast is a type of mast used on warships from the Edwardian era onwards, [dubious – discuss] replacing the pole mast.
Spars, supporting sails, include masts, booms, yards, gaffs and poles. Moveable lines that control sails or other equipment are known collectively as a vessel's running rigging. Lines that raise sails are called halyards while those that strike them are called downhauls. Lines that adjust (trim) the sails are called sheets.
Mizzen: the aftmost mast and sail in a yawl or ketch, or in a vessel with three or more masts. Oar a wooden pole enlarged on one end to resist the water when pulled. Painter: a short line at the bow of a small boat for tying it off. Parrot beak: a spring-loaded stainless steel fitting on the end of a spinnaker pole attaching it to the sail.
A pile driver is a heavy-duty tool used to drive piles into soil to build piers, bridges, cofferdams, and other "pole" supported structures, and patterns of pilings as part of permanent deep foundations for buildings or other structures. Pilings may be made of wood, solid steel, or tubular steel (often later filled with concrete), and may be ...
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