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Underwater Demolition
Underwater demolition is the deliberate destruction or neutralization of man-made or natural underwater obstacles, both for military and civilian purposes. History Charles Pasley In 1839 Charles Pasley, at the time a colonel of the Royal Engineers, started operations to break up the wreck of HMS ''Royal George'', a 100-gun first rate launched in 1756, which sank at moorings at Spithead in 1782, and then salvage as much as possible using divers. Pasley had previously destroyed some old wrecks in the Thames to clear a channel using gunpowder charges. The charges used were made from oak barrels filled with gunpowder and covered with lead. They were initially detonated using chemical fuses, but this was later changed to an electrical system using a resistance-heated platinum wire to detonate the gunpowder. Pasley's operation set many diving milestones, including the first recorded use of the buddy system in diving, when he ordered that his divers operate in pairs. In addition, a C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John G
John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second Epistle of John, often shortened to 2 John * Third Epistle of John, often shortened to 3 John People * John the Baptist (died ), regarded as a prophet and the forerunner of Jesus Christ * John the Apostle (died ), one of the twelve apostles of Jesus Christ * John the Evangelist, assigned author of the Fourth Gospel, once identified with the Apostle * John of Patmos, also known as John the Divine or John the Revelator, the author of the Book of Revelation, once identified with the Apostle * John the Presbyter, a figure either identified with or distinguished from the Apostle, the Evangelist and John of Patmos Other people with the given name Religious figures * John, father of Andrew the Apostle and Saint Peter * Pope John ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Demolition Team
The Underwater Demolition Team (UDT), or frogmen, were amphibious units created by the United States Navy during World War II with specialized missions. They were predecessors of the Navy's current United States Navy SEAL, SEAL teams. Their primary WWII function began with reconnaissance and underwater demolition of natural or man-made obstacles obstructing amphibious warfare, amphibious landings. Postwar they transitioned to Scuba set, scuba gear changing their capabilities. With that they came to be considered more elite and tactical during the Korean War, Korean and Vietnam Wars. UDTs were pioneers in underwater demolition, Rebreather, closed-circuit diving, combat swimming, Brown-water navy, riverine warfare and midget submarine (dry and Wet sub, wet submersible) operations. They later were tasked with ensuring recovery of space capsules and astronauts after splash down in the Mercury program, Mercury, Gemini program, Gemini and Apollo program, Apollo space flight programs. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draper L
Draper was originally a term for a retailer or wholesaler of cloth that was mainly for clothing. A draper may additionally operate as a cloth merchant or a haberdasher. History Drapers were an important trade guild during the medieval period, when the sellers of cloth operated out of drapers' shops. However the original meaning of the term has now largely fallen out of use. In 1724, Jonathan Swift wrote a series of satirical pamphlets in the guise of a draper called the ''Drapier's Letters''. Historical drapers A number of notable people who have at one time or another worked as drapers include: * Sir Thomas Adams, 1st Baronet (1586–1667/1668), Lord Mayor of the City of London * William Barley (1565?–1614), bookseller and publisher * Norman Birkett * Margaret Bondfield * Thomas Burberry, Founder of fashion brand "Burberry" * Eleanor Coade (1733–1821), successful businesswoman with Coade stone * John Graunt, founder of the science of demography * Antonie van Leeuwenhoek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or informally to refer to remotely operated vehicles and Autonomous underwater vehicle, robots, or to medium-sized or smaller vessels (such as the midget submarine and the wet sub). Submarines are referred to as ''boats'' rather than ''ships'' regardless of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and submarines were adopted by several navies. They were first used widely during World War I (1914–1918), and are now used in many navy, navies, large and small. Their military uses include: attacking enemy surface ships (merchant and military) or other submarines; aircraft carrier protection; Blockade runner, blockade running; Ballistic missile submarine, nuclear deterrenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks in World War II, Tanks and Air warfare of World War II, aircraft played major roles, enabling the strategic bombing of cities and delivery of the Atomic bombings of Hiroshima and Nagasaki, first and only nuclear weapons ever used in war. World War II is the List of wars by death toll, deadliest conflict in history, causing World War II casualties, the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Allied-occupied Germany, Germany, Allied-occupied Austria, Austria, Occupation of Japan, Japan, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frogman
A frogman is someone who is trained in scuba diving or swimming underwater. The term often applies more to professional rather than recreational divers, especially those working in a tactical capacity that includes military, and in some European countries, police work. Such personnel are also known by the more formal names of combat diver, combatant diver, or combat swimmer. The word ''frogman'' first arose in the stage name the "Fearless Frogman" of Paul Boyton in the 1870s and later was claimed by John Spence, an enlisted member of the U.S. Navy and member of the OSS Maritime Unit, to have been applied to him while he was training in a green waterproof suit. The term ''frogman'' is occasionally used to refer to a civilian scuba diver, such as in a police diving role. In the United Kingdom, police divers have often been called "police frogmen". Some countries' tactical diver organizations include a translation of the word ''frogman'' in their official names, e.g., Denmark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office Of Strategic Services
The Office of Strategic Services (OSS) was the first intelligence agency of the United States, formed during World War II. The OSS was formed as an agency of the Joint Chiefs of Staff (JCS) to coordinate espionage activities behind enemy lines for all branches of the United States Armed Forces. Other OSS functions included the use of propaganda, subversion, and post-war planning. The OSS was dissolved a month after the end of the war. Intelligence tasks were shortly later resumed and carried over by its successors, the Strategic Services Unit (SSU), the United States Department of State, Department of State's Bureau of Intelligence and Research (INR), and the Central Intelligence Group (CIG), the intermediary precursor to the independent Central Intelligence Agency (CIA). On December 14, 2016, the organization was collectively honored with a Congressional Gold Medal. Origin Before the OSS, the various departments of the executive branch, including the United States Departm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major (rank)
Major is a senior military Officer (armed forces), officer military rank, rank used in many countries. When used unhyphenated and in conjunction with no other indicators, major is one rank above Captain (land), captain in armies and air forces, and one rank below lieutenant colonel. It is considered the most junior of the senior officer ranks. Background Etymologically, the word stems from the Latin word meaning "greater". The rank can be traced back to the rank of sergeant major general, which was shortened to sergeant major, and subsequently shortened to ''major''. When used in hyphenated or combined fashion, the term can also imply seniority at other levels of rank, including major general, denoting a low-level general officer, and sergeant major, denoting the most senior non-commissioned officer (NCO) of a military unit. The term major can also be used with a hyphen to denote the leader of a military band such as in Pipe-Major, pipe-major or drum-major. Links to major ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambertsen Amphibious Respiratory Unit
The Lambertsen Amphibious Respiratory Unit (LARU) is an early model of closed circuit oxygen rebreather used by military frogmen. Christian J. Lambertsen designed a series of them in the US in 1940 (patent filing date: 16 Dec 1940) and in 1944 (issue date: 2 May 1944). Etymology The LARU is what the initials SCUBA (Self-Contained Underwater Breathing Apparatus) originally meant; Lambertsen changed his invention's name to SCUBA in 1952; but later "SCUBA", gradually changing to "scuba", came to mean (first in the USA) any self-contained underwater breathing apparatus. (Modern diving regulator technology was invented by Émile Gagnan and Jacques-Yves Cousteau in 1943 and was not related to rebreathers; nowadays the word SCUBA is largely used to mean Gagnan's and Cousteau's invention and its derivatives.) History Lambertsen designed the LARU while a medical student and demonstrated the LARU to the Office of Strategic Services (OSS) (after already being rejected by the U.S. Navy) in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rebreather
A rebreather is a breathing apparatus that absorbs the carbon dioxide of a user's exhaled breath to permit the rebreathing (recycling) of the substantial unused oxygen content, and unused inert content when present, of each breath. Oxygen is added to replenish the amount metabolised by the user. This differs from open-circuit breathing apparatus, where the exhaled gas is discharged directly into the environment. The purpose is to extend the breathing endurance of a limited gas supply, while also eliminating the bubbles otherwise produced by an open circuit system. The latter advantage over other systems is useful for covert military operations by frogmen, as well as for undisturbed observation of underwater wildlife. A rebreather is generally understood to be a portable apparatus carried by the user. The same technology on a vehicle or non-mobile installation is more likely to be referred to as a life-support system. Rebreather technology may be used where breathing gas supp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christian J
A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the world. The words ''Christ (title), Christ'' and ''Christian'' derive from the Koine Greek title (), a translation of the Biblical Hebrew term ''mashiach'' () (usually rendered as ''messiah'' in English). While there are diverse interpretations of Christianity which sometimes conflict, they are united in believing that Jesus has a unique significance. The term ''Christian'' used as an adjective is descriptive of anything associated with Christianity or Christian churches, or in a proverbial sense "all that is noble, and good, and Christ-like." According to a 2011 Pew Research Center survey, there were 2.3 billion Christians around the world, up from about 600 million in 1910. Today, about 37% of all Christians live in the Americas, about 26% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
