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Memorial anchor in Kirjurinluoto, Pori, Finland. Massive anchor chain for large ships. The weight of the chain is vital for proper holding of the anchor. [ 1] An anchor is a device, normally made of metal, used to secure a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current.
The history of the anchor dates back millennia. The most ancient anchors were probably rocks and many rock anchors have been found dating from at least the Bronze Age. [ 1] Many modern moorings still rely on a large rock as the primary element of their design. However, using pure mass to resist the forces of a storm only works well as a ...
A subdivision of the sheet plywood boat building method is known as the stitch-and-glue method, [10] where pre-shaped panels of plywood are drawn together then edge glued and reinforced with fibreglass without the use of a frame. [11] Metal or plastic ties, nylon fishing line or copper wires pull curved flat panels into three-dimensional curved ...
A pontoon bridge is a collection of specialized, shallow draft boats or floats, connected together to cross a river or canal, with a track or deck attached on top. The water buoyancy supports the boats, limiting the maximum load to the total and point buoyancy of the pontoons or boats. [ 2 ] The supporting boats or floats can be open or closed ...
Guy-wire. A sailboat's mast is supported by shrouds and stays - nautical equivalents of guy wires. 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.
For a small boat (e.g. 22' / 6.7 m sailing yacht), this might consist of a heavy weight on the seabed, a 12 mm or 14 mm rising chain attached to the "anchor", and a bridle made from 20 mm nylon rope, steel cable, or a 16 mm combination steel wire material. The heavy weight (anchor) should be a dense material.
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