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Indicator Net
Constructed using light steel nets, indicator nets were often anchored at various depths to the sea bed around Allied naval bases during both world wars. They were intended to entangle U-boat traffic of the enemy, even though the submarines often managed to disentangle themselves and escape before being blown up by depth charges. Predominantly deployed by the Royal Navy as a means of discouraging enemy submarines from entering Allied waters, indicator nets were used extensively during World War I. Individual nets were sometimes as much as in length. Instead of being used as the sole anti-submarine measure, indicator nets were often mixed with extensive minefields and patrolling warships. Sometimes mines were attached directly to the nets, thus reducing submarine survival chances. After a submarine became entangled in the net, a marker buoy attached to the net drifted along the water's surface indicating an enemy below. The first example of indicator nets causing the destructio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uboot Netz 1
U-boat (German: ''U-Boot'') is a German military submarine of World War I and II. U-boat or U-Boot may also refer to: Software *Das U-Boot, computer software, a GNU GPL boot loader * ''U-boat'' (video game), a 1994 video game * ''Uboat'' (video game), an upcoming submarine simulation video game Transport *U-boat, a nickname for the GE Universal Series of diesel locomotives built by General Electric *Southern Railway's U and U1 class locomotives, nicknamed "U-boats" *U-boat, an Australian class of interurban railcars, otherwise known as U sets *U-boat, a nickname for the WAGR U Class steam locomotives built by the North British Locomotive Company in 1942 Other *U-Boot (beer cocktail) A U-boot is a beer cocktail that is made by placing a shot of vodka into a glass of beer, typically a lager. It is popular in Germany, Poland, North Macedonia, and Flanders. In Germany, the liquor korn is sometimes used instead, while in Flander ..., a cocktail made with vodka and beer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dover
Dover () is a town and major ferry port in Kent, South East England. It faces France across the Strait of Dover, the narrowest part of the English Channel at from Cap Gris Nez in France. It lies south-east of Canterbury and east of Maidstone. The town is the administrative centre of the Dover District and home of the Port of Dover. Archaeological finds have revealed that the area has always been a focus for peoples entering and leaving Great Britain, Britain. The name derives from the River Dour that flows through it. In recent times the town has undergone transformations with a high-speed rail link to London, new retail in town with St James' area opened in 2018, and a revamped promenade and beachfront. This followed in 2019, with a new 500m Pier to the west of the Harbour, and new Marina unveiled as part of a £330m investment in the area. It has also been a point of destination for many illegal migrant crossings during the English Channel migrant crossings (2018-present) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-submarine Indicator Loop
An anti-submarine indicator loop was a submerged cable laid on the sea bed and used to detect the passage of enemy submarines. History In the first years of World War I submarines were fearful, one-sided weapons because they were invisible. In July 1915 Arthur Balfour replaced Winston Churchill as First Lord of the Admiralty. Balfour appreciated the importance of science, so he established a Board of Invention and Research (BIR), composed of a three-man central committee supported by an eminent consulting panel. The remits of Section II of the panel included submarines, its members included physicists Ernest Rutherford and William Henry Bragg. The panel concluded that the most promising approach was to listen for submarines, so they sought to improve hydrophones. Soon Bragg moved to the hydrophone research centre HMS Tarlair at Aberdour on the Firth of Forth (which later relocated to Harwich in Essex). Independently from the BIR, in August 1915, a submerged cable was l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unmanned Underwater Vehicle
Unmanned underwater vehicles (UUV), sometimes known as underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input. Classifications Remotely operated underwater vehicle Remotely Operated Underwater Vehicles (ROUVs) is a subclass of UUVs with the primary purpose of replacing humans for underwater tasks due to the difficult underwater conditions. ROUVs are designed to perform educational or industrial missions. They are manually controlled by an operator to perform tasks that include surveillance and patrolling. The structure of ROUVs disqualify it from being able to operate autonomously. In addition to a camera, actuators, and sensors, ROUVs often include a “gripper” or something ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unmanned Surface Vehicle
Unmanned surface vehicles (USVs), also known as unmanned surface vessels, autonomous surface vehicles (ASVs) in some cases, uncrewed surface vessels (USVs), or colloquially drone ships, or robot boats, are boats or ships that operate on the surface of the water without a crew. USVs operate with various levels of autonomy, from remote control to fully autonomous. Some commercial USVs may utilize COLREGs-compliant navigation. USVs were used militarily as early as World War II for remote controlled target craft and minesweeper purposes, they are becoming more widely used in the twenty-first century for a range of purposes including oceanography and environmental monitoring, as well as cargo transport, and military applications. Various other applications are also being explored. In October 2022 during the Russian invasion of Ukraine Ukraine armed forces used 7 USVs and 8 UAVs in an attack on multiple Russian naval vessels at the Sevastopol Naval Base. According to Naval News, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attack On Pearl Harbor
The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00a.m. (local time) on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning. Japan intended the attack as a preventive action. Its aim was to prevent the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and those of the United States. Over the course of seven hours there were coordinated Japanese attacks on the US-held Philippines, Guam, and Wake Island and on the British Empire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bureau Of Ordnance
The Bureau of Ordnance (BuOrd) was a United States Navy organization, which was responsible for the procurement, storage, and deployment of all naval weapons, between the years 1862 and 1959. History Congress established the Bureau in the Department of the Navy by an act of July 5, 1862 (12 Stat. 510), which transferred the hydrographic functions of the Navy's Bureau of Ordnance and Hydrography (1842–1862) to the newly established Bureau of Navigation. During the early 20th century, BuOrd became involved in the development of aerial weapons. This often led to friction with the Bureau of Aeronautics (BuAer), which had responsibility for the development of Naval aircraft. BuAer's work on "pilotless aircraft," or drones, conflicted with BuOrd's development of guided missiles. After World War II, the Navy examined ways to improve coordination between the two bureaus; ultimately, the decision was made to merge the two organizations into a new bureau, to be known as the Bureau of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SM U-6 (Austria-Hungary)
SM ''U-6'' or ''U-VI'' was a ''U-5''-class submarine or U-boat built for and operated by the Austro-Hungarian Navy (german: Kaiserliche und Königliche Kriegsmarine or ) before and during the First World War. The submarine was built as part of a plan to evaluate foreign submarine designs, and was the second of three boats of the class built by Whitehead & Co. of Fiume after a design by Irishman John Philip Holland. ''U-6'' was laid down in February 1908 and launched in June 1909. The double- hulled submarine was just over long and displaced between , depending on whether surfaced or submerged. ''U-6''s design had inadequate ventilation and exhaust from her twin gasoline engines often intoxicated the crew. The boat was commissioned into the Austro-Hungarian Navy in July 1910, and served as a training boat—sometimes making as many as ten cruises a month—through the beginning of the First World War in 1914. The submarine had only one wartime success, which was sinking a Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strait Of Otranto
The Strait of Otranto ( sq, Ngushtica e Otrantos; it, Canale d'Otranto; hr, Otrantska Vrata) connects the Adriatic Sea with the Ionian Sea and separates Italy from Albania. Its width at Punta Palascìa, east of Salento is less than . The strait is named after the Italian city of Otranto. History Since ancient times, the Strait of Otranto was of vital strategic importance. The Romans used it to transport their troops eastwards. The legions marched to Brundisium (now Brindisi), had only a one-day sea voyage to modern Albania territory and then could move eastwards following the Via Egnatia. World War I During World War I, the strait was of strategic significance. The Allied navies of Italy, France, and Great Britain, by blockading the strait, mostly with light naval forces and lightly armed fishing vessels known as drifters, hindered the cautious Austro-Hungarian Navy from freely entering the Mediterranean Sea, and effectively kept them out of the naval theatre of wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otranto Barrage
The Otranto Barrage was an Allied naval blockade of the Otranto Straits between Brindisi in Italy and Corfu on the Greek side of the Adriatic Sea in the First World War. The blockade was intended to prevent the Austro-Hungarian Navy from escaping into the Mediterranean and threatening Allied operations there. The blockade was effective in preventing surface ships from escaping the Adriatic, but it had little or no effect on the submarines based at Cattaro. Blockade attempt The Adriatic is wide at the Otranto Straits. The blockade consisted mainly of a fleet of drifters, most of them British, and usually armed with a 6-pounder gun and depth charges.''First World War'' – Willmott, H. P., Dorling Kindersley, 2003, Page 186–187 In 1915 when the blockade was begun, two divisions of 20 would be on patrol at a time, equipped with steel indicator nets intended to trap submarines or at least alert the surface vessels to their presence. A third division would be at Brindisi. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SM U-8
SM ''U-8'' was one of the 329 submarines serving in the Imperial German Navy in World War I. Service history ''U-8'' was engaged in the naval warfare and took part in the First Battle of the Atlantic. Fate Trapped in nets, forced to surface and scuttled under gunfire from and , in the English Channel, at position . In June 2015 the submarine's propeller, which had been illegally removed from the wreck, was recovered and presented to the German Navy. It will be exhibited at the Laboe Naval Memorial near Kiel. In July 2016 the wreck of ''U-8'' was officially designated as a protected site. The wreck is a Protected Wreck managed by Historic England Historic England (officially the Historic Buildings and Monuments Commission for England) is an executive non-departmental public body of the British Government sponsored by the Department for Digital, Culture, Media and Sport. It is tasked wit .... Summary of raiding history References Bibliography * * External links ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buoy
A buoy () is a floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. Types Navigational buoys * Race course marker buoys are used for buoy racing, the most prevalent form of yacht racing and power boat racing. They delimit the course and must be passed to a specified side. They are also used in underwater orienteering competitions. * Emergency wreck buoys provide a clear and unambiguous means of temporarily marking new wrecks, typically for the first 24–72 hours. They are coloured in an equal number of blue and yellow vertical stripes and fitted with an alternating blue and yellow flashing light. They were implemented following collisions in the Dover Strait in 2002 when vessels struck the new wreck of the . * Ice marking buoys mark holes in frozen lakes and rivers so snowmobiles do not drive over the holes. * Large Navigational Buoys (LNB, or Lanby buoys) are automatic buoys over 10 m high equipped with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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