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Nemi ships. Coordinates: 41°43′20″N 12°42′6″E. The remains of the hull of one of the two ships recovered from Lake Nemi. Workers in the foreground give an indication of scale. 1930. The remains of a Lake Nemi ship in 1929. The Nemi ships were two ships, of different sizes, built under the reign of the Roman emperor Caligula in the 1st ...
A deep-penetrating anchor (DPA) is conceptually similar to a torpedo anchor: it features a dart-shaped, thick-walled, steel cylinder with flukes attached to the upper section of the anchor. A full-scale DPA is approximately 15 metres (49 ft) in length, 1.2 metres (4 ft) in diameter, and weighs on the order of 50–100 tonnes (49–98 long tons ...
A close-up view of an Alberich tile, illustrating patterns of multiple holes with different diameters Alberich tiles as they appear on U-480. The technology of anechoic tiles was developed by the Kriegsmarine during the Second World War, codenamed Alberich after the invisible guardian dwarf of the Rhinegold treasure from Richard Wagner's Der Ring des Nibelungen music dramas.
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.
An early wooden drogue. A sea anchor (also known as a parachute anchor, drift anchor, drift sock, para-anchor or boat brake) is a device that is streamed from a boat in heavy weather. Its purpose is to stabilize the vessel and to limit progress through the water. Rather than tethering the boat to the seabed with a conventional anchor, a sea ...
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