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Anti-torpedo Bulge
The anti-torpedo bulge (also known as an anti-torpedo blister) is a form of defence against naval torpedoes occasionally employed in warship construction in the period between the First and Second World Wars. It involved fitting (or retrofitting) partially water-filled compartmentalized sponsons on either side of a ship's hull, intended to detonate torpedoes, absorb their explosions, and contain flooding to damaged areas within the bulges. Application Essentially, the bulge is a compartmentalized, below the waterline sponson isolated from the ship's internal volume. It is part air-filled, and part free-flooding. In theory, a torpedo strike will rupture and flood the bulge's outer air-filled component while the inner water-filled part dissipates the shock and absorbs explosive fragments, leaving the ship's main hull structurally intact. Transverse bulkheads within the bulge limit flooding to the damaged area of the structure. The bulge was developed by the British Director of N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Revenge-class Battleship
The ''Revenge'' class, sometimes referred to as the ''Royal Sovereign'' class or the R class, consisted of five superdreadnought battleships built for the Royal Navy in the 1910s. All of the ships were completed to see service during the First World War. There were originally to have been eight of the class, but two were later redesigned, becoming the s, while the other, which was to have been named HMS ''Resistance'', was cancelled outright. The design was based on that of the preceding , but with reductions in size and speed to make them more economical to build. Two of the ships, and , were completed in time to see action at the Battle of Jutland during the First World War, where they engaged German battlecruisers. The other three ships were completed after the battle, by which time the British and German fleets had adopted more cautious strategies, and as a result, the class saw no further substantial action. During the early 1920s, the ships were involved in the Greco-T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Armour
Naval armour refers to the various protections schemes employed by warships, and is distinguished from other kinds of armour. Naval sailing ships have had protection from weaponry since at least ancient times, when Greek and Roman warships used simple cladding. As weapons evolved and became more destructive, naval armour became an important part of warships. Korean and European ships began to use some iron plating in the 1500s. The first ironclad warship was created in 1859, and the pace of armour advancement accelerated quickly thereafter. The emergence of battleships around the turn of the 20th century saw ships become increasingly large and well armoured. Vast quantities of heavily armoured ships were used during the World Wars, and were crucial in the outcome. The emergence of guided missiles in the last part of the 20th century has greatly reduced the utility of armor, and most modern warships are now only lightly armored. Naval armour consists of many different designs, depe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spaced Armor
Armour with two or more plates spaced a distance apart falls under the category of spaced armour. Spaced armour can be sloped or unsloped. When sloped, it reduces the penetrating power of bullets and solid shot, as after penetrating each plate projectiles tend to tumble, deflect, deform, or disintegrate; spaced armour that is not sloped is generally designed to provide protection from explosive projectiles, which detonate before reaching the primary armour. Spaced armour is used on military vehicles such as tanks and combat bulldozers. In a less common application, it is used in some spacecraft that use Whipple shields. Against kinetic penetrators The first spaced armour was used on iron and steel warships from the mid-19th century. Between the thin outer armour of various less important parts and the thick main armour (protecting turrets, ammunition depots, boilers and turbines) were constructed storage spaces, coal or oil bunkers, and so on ( Lord Nelson class). Some ships (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo Net
Torpedo nets were a passive ship defensive device against torpedoes. They were in common use from the 1890s until the World War II, Second World War. They were superseded by the anti-torpedo bulge and torpedo belts. Origins With the introduction of the Whitehead torpedo in 1873, and the subsequent development of the torpedo boat, new means were sought to protect capital ships against underwater attacks. In 1876 the British Admiralty Torpedo Committee came up with a number of recommendations for combating torpedoes, which included "... nets of galvanised iron hung around each battleship from projecting 40 ft spars". Experiments were conducted in 1877, with becoming the first operational ship to be fitted with the nets. Design and use Torpedo nets could be hung out from the defending ship, when moored or otherwise stationary in the water, on multiple horizontal boom (sailing), booms. Each boom was fixed to the ship at one end at or below the edge of the main deck, by a steel pin t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo Belt
The torpedo belt was part of the armouring scheme in some warships between the 1920s and 1940s. It consisted of a series of lightly armoured compartments, extending laterally along a narrow belt that intersected the ship's waterline. In theory this belt would absorb the explosions from torpedoes, or any naval artillery shells that struck below the waterline, and thus minimize internal damage to the ship itself. Torpedo belts are also known as Side Protection Systems or SPS, or Torpedo Defense System or TDS. Background: insufficiency of belt armor Armoured warships (dreadnought battleships, armoured cruisers and later light and heavy cruisers) of the early 20th century carried their main protective armour above the waterline – the "main belt" – which was intended to stop flat-trajectory gunfire from piercing the hull. Below the belt, the armour generally tapered away, to reduce overall weight. This, however, makes a ship vulnerable to hits below the waterline from torp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Proximity Fuze
A magnetic proximity fuse was patented by P.J. Eliomarkakis, (United States Patent US2434551 of January 13, 1948) although similar devices had been in service for nearly a decade. It is a type of proximity fuze that initiates a detonator in a piece of ordnance such as a land mine, naval mine, depth charge, or shell when the fuse's magnetic equilibrium is upset by a magnetic object such as a tank or a submarine. Magnetic field sensors and movement sensors inside the ordnance detect changes to the terrestrial magnetic field of the ordnance caused by another ferromagnetic object. A signal processor inside the ordnance receives the signals from the magnetic field sensors and movement sensors and activates the detonator which will then detonate the explosives within the ordnance. Examples Examples of pieces of ordnance that employ a magnetic fuze include: * the Chinese Chen-2 bottom mine * the Egyptian T-93 mine See also * Proximity sensor * Reed switch * Precision bombing * Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Pistol
Magnetic pistol is the term for the device on a torpedo or naval mine that detects its target by its magnetic field, and triggers the fuse for detonation. A device to detonate a torpedo or mine on ''contact'' with a ship or submarine is known as a contact pistol. A magnetic pistol on a mine will allow the mine to detonate in proximity to a target, rather than actual contact, allowing the mine to cover a larger effective area. A magnetic pistol on a torpedo allows the torpedo to detonate underneath the ship, instead of upon impact with the side of the ship. As an explosion underneath a ship is contained between water and the ship, far more damage will result to the ship. The explosion will lift the ship out of the water and may break the keel of the ship, splitting it in two. Any hole created by the explosion will be on the bottom, causing more flooding. A contact pistol on a torpedo will require the torpedo to strike the side of the ship. Any hole created by the explosion will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Battleship Yamashiro
was the second of two dreadnought battleships built for the Imperial Japanese Navy. Launched in 1915 and commissioned in 1917, she initially patrolled off the coast of China, playing no part in World War I. In 1923, she assisted survivors of the Great Kantō earthquake. ''Yamashiro'' was modernized between 1930 and 1935, with improvements to her armor and machinery and a rebuilt superstructure in the pagoda mast style. Nevertheless, with only 14-inch guns, she was outclassed by other Japanese battleships at the beginning of World War II, and played auxiliary roles for most of the war. By 1944, though, she was forced into front-line duty, serving as the flagship of Vice-Admiral Shōji Nishimura's Southern Force at the Battle of Surigao Strait, the southernmost action of the Battle of Leyte Gulf. During fierce night fighting in the early hours of 25 October against a superior American and Australian force, ''Yamashiro'' was sunk by torpedoes and naval gunfire. Nishimura wen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dover Harbour
The Port of Dover is a cross-channel ferry, cruise terminal, maritime cargo and marina facility situated in Dover, Kent, south-east England. It is the nearest English port to France, at just away, and is one of the List of busiest cruise ports by passengers, world's busiest maritime passenger ports, with 11.7 million passengers, 2.6 million lorries, 2.2 million cars and motorcycles and 80,000 coaches passing through it in 2017, and with an annual turnover of £58.5 million a year. This contrasts with the nearby Channel Tunnel, the only fixed link between the island of Great Britain and the European mainland, which now handles an estimated 20 million passengers and 1.6 million trucks per year. The modern port facility features a large artificial harbour constructed behind stone piers and a defensive concrete breakwater. The port is divided into two main sections: the Eastern Docks serve as the main cross-channel ferry terminal, while the Western Docks contain a cruise ship termi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FL-boat
The FL-boat (''Fernlenkboot'', literally "remote controlled boat") was a weapon used by the Imperial German Navy during World War I. It was a remote-controlled motorboat, 17 m long, carrying of explosives, which was intended to be steered directly at its targets - initially the Royal Navy monitors operating off the coast of Flanders. FL-boats were constructed by Siemens-Schuckertwerke. They were driven by internal combustion engines and controlled remotely from a shore station through spooled wire unwound behind the boat. The wire was long and the spool weighed . An aircraft could be used to signal directions to the shore station by radio. The commands available to the boat operator were: * System test * Engine start, engine stop * Set Rudder position * Turn on a light, to enable the boat to be tracked at night * Detonate the warhead, to prevent capture of the boat if it missed its target Planned developments were to use a control station carried on a ship, in an airship or use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Erebus (I02)
HMS ''Erebus'' was a First World War Monitor warship type, monitor launched on 19 June 1916 and which served in both world wars. She and her sister ship are known as the . They were named after the two bomb vessels sent to investigate the Northwest Passage as part of Franklin's lost expedition (1845–1848), in which all 129 members eventually perished. Monitors were designed as stable gun platforms with a shallow Draft (hull), draught to allow operations close inshore in support of land operations, and were not intended to contest naval battles. ''Erebus'' was equipped with two 15 inch /42 (38.1 cm) Mark I naval gun, /42 guns (removed from ) in a single forward turret mounted on a tall barbette to extend the range of fire to . The ''Erebus'' class were designed to outrange German heavy shore batteries and they were also fitted with highly effective anti-torpedo bulges on each side of the Hull (watercraft), hull. Background During the First World War, the Royal Navy developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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