The Chocolate Mountain Aerial Gunnery Range ( CMAGR ) is a bombing range operated by the United States Marine Corps , located in Southern California .
63-673: The range is a 459,000 acres (1,860 km) open-area, approximately 20 miles wide, east to west, and 50 miles long, northwest to southeast, with a special-use airspace of 700 square miles (1,800 km) which is used for aerial bombing and live fire aerial gunnery practice. It straddles the northern portion of the Chocolate Mountains to the east of the Salton Sea in Imperial and Riverside counties, California, with restricted airspace in both California and Arizona . It
126-652: A Jurchen Jin army against a Chinese Song city. The term for this explosive bomb seems to have been coined the " thunder crash bomb " during a Jin dynasty (1115–1234) naval battle in 1231 against the Mongols . The History of Jin (金史) (compiled by 1345) states that in 1232, as the Mongol general Subutai (1176–1248) descended on the Jin stronghold of Kaifeng , the defenders had a " thunder crash bomb " which "consisted of gunpowder put into an iron container ... then when
189-404: A blasting cap containing a more sensitive primary explosive . A thermobaric bomb is a type of explosive that utilizes oxygen from the surrounding air to generate an intense, high-temperature explosion, and in practice the blast wave typically produced by such a weapon is of a significantly longer duration than that produced by a conventional condensed explosive. The fuel-air bomb is one of
252-609: A "Geologic Map and Database of the Chocolate Mountain Aerial Gunnery Range" in 2018. Bomb A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy . Detonations inflict damage principally through ground- and atmosphere-transmitted mechanical stress , the impact and penetration of pressure-driven projectiles, pressure damage, and explosion-generated effects. Bombs have been utilized since
315-593: A bomb exploding in a transport network often damages, and is sometimes mainly intended to damage, the network itself. This applies to railways , bridges , runways , and ports , and, to a lesser extent (depending on circumstances), to roads. In the case of suicide bombing , the bomb is often carried by the attacker on their body, or in a vehicle driven to the target. The Blue Peacock nuclear mines, which were also termed "bombs", were planned to be positioned during wartime and be constructed such that, if disturbed, they would explode within ten seconds. The explosion of
378-477: A bomb may be triggered by a detonator or a fuse . Detonators are triggered by clocks , remote controls like cell phones or some kind of sensor, such as pressure (altitude), radar , vibration or contact. Detonators vary in ways they work, they can be electrical, fire fuze or blast initiated detonators and others, In forensic science , the point of detonation of a bomb is referred to as its blast seat, seat of explosion, blast hole or epicenter . Depending on
441-499: A combination of negative shock wave effects and extreme temperature to incinerate objects within the blast radius. Fragmentation is produced by the acceleration of shattered pieces of bomb casing and adjacent physical objects. The use of fragmentation in bombs dates to the 14th century, and appears in the Ming Dynasty text Huolongjing . The fragmentation bombs were filled with iron pellets and pieces of broken porcelain. Once
504-407: A comparatively low explosive yield to scatter harmful material over a wide area. Most commonly associated with radiological or chemical materials, dirty bombs seek to kill or injure and then to deny access to a contaminated area until a thorough clean-up can be accomplished. In the case of urban settings, this clean-up may take extensive time, rendering the contaminated zone virtually uninhabitable in
567-412: A high burst pressure to be useful as a bomb. A high explosive bomb is one that employs a process called " detonation " to rapidly go from an initially high energy molecule to a very low energy molecule. Detonation is distinct from deflagration in that the chemical reaction propagates faster than the speed of sound (often many times faster) in an intense shock wave. Therefore, the pressure wave produced by
630-444: A high explosive is not significantly increased by confinement as detonation occurs so quickly that the resulting plasma does not expand much before all the explosive material has reacted. This has led to the development of plastic explosive . A casing is still employed in some high explosive bombs, but with the purpose of fragmentation . Most high explosive bombs consist of an insensitive secondary explosive that must be detonated with
693-574: A major military feature, and a number of novel delivery methods were introduced. These included Barnes Wallis 's bouncing bomb , designed to bounce across water, avoiding torpedo nets and other underwater defenses, until it reached a dam , ship , or other destination, where it would sink and explode. By the end of the war, planes such as the allied forces' Avro Lancaster were delivering with 50 yd (46 m) accuracy from 20,000 ft (6,100 m), ten ton earthquake bombs (also invented by Barnes Wallis) named " Grand Slam ", which, unusually for
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#1732779548135756-702: A military range. The CMAGR provides opportunities for military training by use of its varied terrain and special-use airspace. The CMAGR is the centerpiece of the Bob Stump Training Range Complex and can support multiple training operations concurrently. The CMAGR's live-fire aviation training ranges provide training for air combat maneuvering and tactics; air-to-air gunnery; airborne laser system operations; close air support; and air-to-ground bombing, strafing, and rocketry. The CMAGR also supports ground training to include air defense, air control, communications, demolition operations, as well as
819-401: A mixture of an oxidizing salt, such as potassium nitrate (saltpeter), with solid fuel, such as charcoal or aluminium powder. These compositions deflagrate upon ignition, producing hot gas. Under normal circumstances, this deflagration occurs too slowly to produce a significant pressure wave; low explosives, therefore, must generally be used in large quantities or confined in a container with
882-524: A range of offensive weaponry. For instance, in recent asymmetric conflicts, homemade bombs called " improvised explosive devices " (IEDs) have been employed by irregular forces to great effectiveness. The word comes from the Latin bombus , which in turn comes from the Greek βόμβος romanized bombos , an onomatopoetic term meaning 'booming', 'buzzing'. Gunpowder bombs had been mentioned since
945-407: A significant explosion can occur. Under the right circumstances, rapid consolidation can provoke a chain reaction that can proliferate and intensify by many orders of magnitude within microseconds. The energy released by a nuclear fission bomb may be tens of thousands of times greater than a chemical bomb of the same mass. A thermonuclear weapon is a type of nuclear bomb that releases energy through
1008-631: A single pylon. Some bombs are equipped with a parachute , such as the World War II "parafrag" (an 11 kg (24 lb) fragmentation bomb), the Vietnam War -era daisy cutters , and the bomblets of some modern cluster bombs . Parachutes slow the bomb's descent, giving the dropping aircraft time to get to a safe distance from the explosion. This is especially important with air-burst nuclear weapons (especially those dropped from slower aircraft or with very high yields), and in situations where
1071-562: A standard design out of standard components and intended to be deployed in a standard explosive device. IEDs are divided into three basic categories by basic size and delivery. Type 76, IEDs are hand-carried parcel or suitcase bombs, type 80, are "suicide vests" worn by a bomber, and type 3 devices are vehicles laden with explosives to act as large-scale stationary or self-propelled bombs, also known as VBIED (vehicle-borne IEDs). Improvised explosive materials are typically unstable and subject to spontaneous, unintentional detonation triggered by
1134-765: A system for doing so. Methods of romanization include transliteration , for representing written text, and transcription , for representing the spoken word, and combinations of both. Transcription methods can be subdivided into phonemic transcription , which records the phonemes or units of semantic meaning in speech, and more strict phonetic transcription , which records speech sounds with precision. There are many consistent or standardized romanization systems. They can be classified by their characteristics. A particular system's characteristics may make it better-suited for various, sometimes contradictory applications, including document retrieval, linguistic analysis, easy readability, faithful representation of pronunciation. If
1197-469: A wide range of environmental effects, ranging from impact and friction to electrostatic shock. Even subtle motion , change in temperature , or the nearby use of cellphones or radios can trigger an unstable or remote-controlled device. Any interaction with explosive materials or devices by unqualified personnel should be considered a grave and immediate risk of death or dire injury. The safest response to finding an object believed to be an explosive device
1260-459: Is a hypothetical nuclear weapon that does not require a primary fission stage to start a fusion reaction. Antimatter bombs can theoretically be constructed, but antimatter is very costly to produce and hard to store safely. The first air-dropped bombs were used by the Austrians in the 1849 siege of Venice . Two hundred unmanned balloons carried small bombs, although few bombs actually hit
1323-489: Is a perfectly mutually intelligible language, essentially meaning that any kind of text-based open source collaboration is impossible among devanagari and nastaʿlīq readers. Initiated in 2011, the Hamari Boli Initiative is a full-scale open-source language planning initiative aimed at Hindustani script, style, status & lexical reform and modernization. One of primary stated objectives of Hamari Boli
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#17327795481351386-530: Is called " rōmaji " in Japanese . The most common systems are: While romanization has taken various and at times seemingly unstructured forms, some sets of rules do exist: Several problems with MR led to the development of the newer systems: Thai , spoken in Thailand and some areas of Laos, Burma and China, is written with its own script , probably descended from mixture of Tai–Laotian and Old Khmer , in
1449-437: Is created by the sudden release of heat caused by an explosion. Military bomb tests have documented temperatures of up to 2,480 °C (4,500 °F). While capable of inflicting severe to catastrophic burns and causing secondary fires, thermal wave effects are considered very limited in range compared to shock and fragmentation. This rule has been challenged, however, by military development of thermobaric weapons , which employ
1512-497: Is no single universally accepted system of writing Russian using the Latin script—in fact there are a huge number of such systems: some are adjusted for a particular target language (e.g. German or French), some are designed as a librarian's transliteration, some are prescribed for Russian travellers' passports; the transcription of some names is purely traditional. All this has resulted in great reduplication of names. E.g.
1575-506: Is the most common system of phonetic transcription. For most language pairs, building a usable romanization involves trade between the two extremes. Pure transcriptions are generally not possible, as the source language usually contains sounds and distinctions not found in the target language, but which must be shown for the romanized form to be comprehensible. Furthermore, due to diachronic and synchronic variance no written language represents any spoken language with perfect accuracy and
1638-415: Is to get as far away from it as possible. Atomic bombs are based on the theory of nuclear fission , that when a large atom splits, it releases a massive amount of energy. Thermonuclear weapons , (colloquially known as "hydrogen bombs") use the energy from an initial fission explosion to create an even more powerful fusion explosion. The term " dirty bomb " refers to a specialized device that relies on
1701-548: Is to relieve Hindustani of the crippling devanagari–nastaʿlīq digraphia by way of romanization. Romanization of the Sinitic languages , particularly Mandarin , has proved a very difficult problem, although the issue is further complicated by political considerations. Because of this, many romanization tables contain Chinese characters plus one or more romanizations or Zhuyin . Romanization (or, more generally, Roman letters )
1764-644: Is under the jurisdiction of the United States Navy and United States Marine Corps , and is closed to the public. The United States Department of Defense aviation combat crews have trained at the CMAGR and within its airspace since World War II . The range is managed by Marine Corps Air Station Yuma . The CMAGR range area was permanently transferred to the Department of the Navy in 2014 to be used as
1827-527: Is used for languages of the Indian subcontinent and south-east Asia. There is a long tradition in the west to study Sanskrit and other Indic texts in Latin transliteration. Various transliteration conventions have been used for Indic scripts since the time of Sir William Jones. Hindustani is an Indo-Aryan language with extreme digraphia and diglossia resulting from the Hindi–Urdu controversy starting in
1890-816: The Brahmic family . The Nuosu language , spoken in southern China, is written with its own script, the Yi script . The only existing romanisation system is YYPY (Yi Yu Pin Yin), which represents tone with letters attached to the end of syllables, as Nuosu forbids codas. It does not use diacritics, and as such due to the large phonemic inventory of Nuosu, it requires frequent use of digraphs, including for monophthong vowels. The Tibetan script has two official romanization systems: Tibetan Pinyin (for Lhasa Tibetan ) and Roman Dzongkha (for Dzongkha ). In English language library catalogues, bibliographies, and most academic publications,
1953-509: The Library of Congress transliteration method is used worldwide. In linguistics, scientific transliteration is used for both Cyrillic and Glagolitic alphabets . This applies to Old Church Slavonic , as well as modern Slavic languages that use these alphabets. A system based on scientific transliteration and ISO/R 9:1968 was considered official in Bulgaria since the 1970s. Since
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2016-697: The Soviet Union , with some material published. The 2010 Ukrainian National system has been adopted by the UNGEGN in 2012 and by the BGN/PCGN in 2020. It is also very close to the modified (simplified) ALA-LC system, which has remained unchanged since 1941. The chart below shows the most common phonemic transcription romanization used for several different alphabets. While it is sufficient for many casual users, there are multiple alternatives used for each alphabet, and many exceptions. For details, consult each of
2079-541: The United States Air Force 's MOAB (officially Massive Ordnance Air Blast, or more commonly known as the "Mother of All Bombs"). Below is a list of five different types of bombs based on the fundamental explosive mechanism they employ. Relatively small explosions can be produced by pressurizing a container until catastrophic failure such as with a dry ice bomb . Technically, devices that create explosions of this type can not be classified as "bombs" by
2142-579: The "thunder-crash bombs" has been discovered in an underwater shipwreck off the shore of Japan by the Kyushu Okinawa Society for Underwater Archaeology. X-rays by Japanese scientists of the excavated shells confirmed that they contained gunpowder. Explosive shock waves can cause situations such as body displacement (i.e., people being thrown through the air), dismemberment , internal bleeding and ruptured eardrums . Shock waves produced by explosive events have two distinct components,
2205-682: The 11th century starting in East Asia . The term bomb is not usually applied to explosive devices used for civilian purposes such as construction or mining , although the people using the devices may sometimes refer to them as a "bomb". The military use of the term "bomb", or more specifically aerial bomb action, typically refers to airdropped, unpowered explosive weapons most commonly used by air forces and naval aviation . Other military explosive weapons not classified as "bombs" include shells , depth charges (used in water), or land mines . In unconventional warfare , other names can refer to
2268-808: The 11th century. In 1000 AD, a soldier by the name of Tang Fu (唐福) demonstrated a design of gunpowder pots (a proto-bomb which spews fire) and gunpowder caltrops, for which he was richly rewarded. In the same year, Xu Dong wrote that trebuchets used bombs that were like "flying fire", suggesting that they were incendiaries. In the military text Wujing Zongyao of 1044, bombs such as the "ten-thousand fire flying sand magic bomb", "burning heaven fierce fire unstoppable bomb", and "thunderclap bomb" ( pilipao ) were mentioned. However these were soft-shell bombs and did not use metal casings. Bombs made of cast iron shells packed with explosive gunpowder date to 13th century China. Explosive bombs were used in East Asia in 1221, by
2331-462: The 1800s. Technically, Hindustani itself is recognized by neither the language community nor any governments. Two standardized registers , Standard Hindi and Standard Urdu , are recognized as official languages in India and Pakistan. However, in practice the situation is, The digraphia renders any work in either script largely inaccessible to users of the other script, though otherwise Hindustani
2394-589: The Japanese martial art 柔術: the Nihon-shiki romanization zyûzyutu may allow someone who knows Japanese to reconstruct the kana syllables じゅうじゅつ , but most native English speakers, or rather readers, would find it easier to guess the pronunciation from the Hepburn version, jūjutsu . The Arabic script is used to write Arabic , Persian , Urdu , Pashto and Sindhi as well as numerous other languages in
2457-454: The Muslim world, particularly African and Asian languages without alphabets of their own. Romanization standards include the following: or G as in genre اِ || e || e || i || e || e || e || e Notes : Notes : There are romanization systems for both Modern and Ancient Greek . The Hebrew alphabet is romanized using several standards: The Brahmic family of abugidas
2520-491: The aircraft releases a bomb at low altitude. A number of modern bombs are also precision-guided munitions , and may be guided after they leave an aircraft by remote control, or by autonomous guidance. Aircraft may also deliver bombs in the form of warheads on guided missiles , such as long-range cruise missiles , which can also be launched from warships . A hand grenade is delivered by being thrown. Grenades can also be projected by other means, such as being launched from
2583-401: The best-known types of thermobaric weapons. Nuclear fission type atomic bombs utilize the energy present in very heavy atomic nuclei, such as U-235 or Pu-239. In order to release this energy rapidly, a certain amount of the fissile material must be very rapidly consolidated while being exposed to a neutron source. If consolidation occurs slowly, repulsive forces drive the material apart before
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2646-530: The bomb explodes, the resulting fragments are capable of piercing the skin and blinding enemy soldiers. While conventionally viewed as small metal shards moving at super- supersonic and hypersonic speeds, fragmentation can occur in epic proportions and travel for extensive distances. When the SS Grandcamp exploded in the Texas City Disaster on April 16, 1947, one fragment of that blast
2709-519: The casual reader who is unfamiliar with the original script to pronounce the source language reasonably accurately. Such romanizations follow the principle of phonemic transcription and attempt to render the significant sounds ( phonemes ) of the original as faithfully as possible in the target language. The popular Hepburn Romanization of Japanese is an example of a transcriptive romanization designed for English speakers. A phonetic conversion goes one step further and attempts to depict all phones in
2772-871: The city. The first bombing from a fixed-wing aircraft took place in 1911 when the Italians dropped bombs by hand on the Turkish lines in what is now Libya , during the Italo-Turkish War . The first large scale dropping of bombs took place during World War I starting in 1915 with the German Zeppelin airship raids on London , England, and the same war saw the invention of the first heavy bombers . One Zeppelin raid on 8 September 1915 dropped 4,000 lb (1,800 kg) of high explosives and incendiary bombs, including one bomb that weighed 600 lb (270 kg). During World War II bombing became
2835-608: The combination of fission and fusion of the light atomic nuclei of deuterium and tritium. With this type of bomb, a thermonuclear detonation is triggered by the detonation of a fission type nuclear bomb contained within a material containing high concentrations of deuterium and tritium. Weapon yield is typically increased with a tamper that increases the duration and intensity of the reaction through inertial confinement and neutron reflection. Nuclear fusion bombs can have arbitrarily high yields making them hundreds or thousands of times more powerful than nuclear fission. A pure fusion weapon
2898-433: The definition presented at the top of this article. However, the explosions created by these devices can cause property damage, injury, or death. Flammable liquids, gasses and gas mixtures dispersed in these explosions may also ignite if exposed to a spark or flame. The simplest and oldest bombs store energy in the form of a low explosive . Black powder is an example of a low explosive. Low explosives typically consist of
2961-448: The explosive fireball as well as incendiary agents projected onto the body. Personal protective equipment, such as a bomb suit or demining ensemble, as well as helmets, visors and foot protection, can dramatically reduce the four effects, depending upon the charge, proximity and other variables. Experts commonly distinguish between civilian and military bombs. The latter are almost always mass-produced weapons, developed and constructed to
3024-463: The fuse was lit (and the projectile shot off) there was a great explosion the noise whereof was like thunder, audible for more than thirty miles, and the vegetation was scorched and blasted by the heat over an area of more than half a mou . When hit, even iron armour was quite pierced through." The Song Dynasty (960–1279) official Li Zengbo wrote in 1257 that arsenals should have several hundred thousand iron bomb shells available and that when he
3087-572: The interim. The power of large bombs is typically measured in kilotons (kt) or megatons of TNT (Mt) . The most powerful bombs ever used in combat were the two atomic bombs dropped by the United States to attack Hiroshima and Nagasaki , and the most powerful ever tested was the Tsar Bomba . The most powerful non-nuclear bomb is Russian " Father of All Bombs " (officially Aviation Thermobaric Bomb of Increased Power (ATBIP)) followed by
3150-427: The internal organs. When the overpressure wave impacts the body it can induce violent levels of blast-induced acceleration. Resulting injuries may range from minor to unsurvivable. Immediately following this initial acceleration, deceleration injuries can occur when a person impacts directly against a rigid surface or obstacle after being set in motion by the force of the blast. Finally, injury and fatality can result from
3213-457: The late 1990s, Bulgarian authorities have switched to the so-called Streamlined System avoiding the use of diacritics and optimized for compatibility with English. This system became mandatory for public use with a law passed in 2009. Where the old system uses <č,š,ž,št,c,j,ă>, the new system uses <ch,sh,zh,sht,ts,y,a>. The new Bulgarian system was endorsed for official use also by UN in 2012, and by BGN and PCGN in 2013. There
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#17327795481353276-462: The muzzle of a rifle (as in the rifle grenade ), using a grenade launcher (such as the M203 ), or by attaching a rocket to the explosive grenade (as in a rocket-propelled grenade (RPG)). A bomb may also be positioned in advance and concealed. A bomb destroying a rail track just before a train arrives will usually cause the train to derail . In addition to the damage to vehicles and people,
3339-475: The name of the Russian composer Tchaikovsky may also be written as Tchaykovsky , Tchajkovskij , Tchaikowski , Tschaikowski , Czajkowski , Čajkovskij , Čajkovski , Chajkovskij , Çaykovski , Chaykovsky , Chaykovskiy , Chaikovski , Tshaikovski , Tšaikovski , Tsjajkovskij etc. Systems include: The Latin script for Syriac was developed in the 1930s, following the state policy for minority languages of
3402-484: The positive and negative wave. The positive wave shoves outward from the point of detonation, followed by the trailing vacuum space "sucking back" towards the point of origin as the shock bubble collapses. The greatest defense against shock injuries is distance from the source of shock. As a point of reference, the overpressure at the Oklahoma City bombing was estimated in the range of 28 MPa . A thermal wave
3465-589: The romanization attempts to transliterate the original script, the guiding principle is a one-to-one mapping of characters in the source language into the target script, with less emphasis on how the result sounds when pronounced according to the reader's language. For example, the Nihon-shiki romanization of Japanese allows the informed reader to reconstruct the original Japanese kana syllables with 100% accuracy, but requires additional knowledge for correct pronunciation. Most romanizations are intended to enable
3528-398: The source language, sacrificing legibility if necessary by using characters or conventions not found in the target script. In practice such a representation almost never tries to represent every possible allophone—especially those that occur naturally due to coarticulation effects—and instead limits itself to the most significant allophonic distinctions. The International Phonetic Alphabet
3591-420: The sudden and drastic rise in ambient pressure that can damage the internal organs, possibly leading to permanent damage or death. Fragmentation can also include sand, debris and vegetation from the area surrounding the blast source. This is very common in anti-personnel mine blasts. The projection of materials poses a potentially lethal threat caused by cuts in soft tissues, as well as infections, and injuries to
3654-636: The support of small arms and artillery. The Naval Special Warfare Command also use a portion of the CMAGR for desert warfare training. The Bradshaw Trail , an old stage road and now a four wheel drive vehicle road, traverses the north boundary of the Gunnery Range between the Chocolate Mountains and the Orocopia Mountains and Chuckwalla Mountains to the north. The Navy and Marine Corps jointly prepared and published
3717-515: The time, were delivered from high altitude in order to gain high speed, and would, upon impact, penetrate and explode deep underground (" camouflet "), causing massive caverns or craters, and affecting targets too large or difficult to be affected by other types of bomb. Modern military bomber aircraft are designed around a large-capacity internal bomb bay , while fighter-bombers usually carry bombs externally on pylons or bomb racks or on multiple ejection racks, which enable mounting several bombs on
3780-462: The type, quantity and placement of explosives, the blast seat may be either spread out or concentrated (i.e., an explosion crater ). Other types of explosions , such as dust or vapor explosions, do not cause craters or even have definitive blast seats. Romanized In linguistics , romanization is the conversion of text from a different writing system to the Roman (Latin) script , or
3843-509: The vocal interpretation of a script may vary by a great degree among languages. In modern times the chain of transcription is usually spoken foreign language, written foreign language, written native language, spoken (read) native language. Reducing the number of those processes, i.e. removing one or both steps of writing, usually leads to more accurate oral articulations. In general, outside a limited audience of scholars, romanizations tend to lean more towards transcription. As an example, consider
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#17327795481353906-500: Was a two-ton anchor which was hurled nearly two miles inland to embed itself in the parking lot of the Pan American refinery. To people who are close to a blast incident, such as bomb disposal technicians, soldiers wearing body armor, deminers, or individuals wearing little to no protection, there are four types of blast effects on the human body: overpressure (shock), fragmentation , impact , and heat . Overpressure refers to
3969-577: Was in Jingzhou , about one to two thousand were produced each month for dispatch of ten to twenty thousand at a time to Xiangyang and Yingzhou. The Ming Dynasty text Huolongjing describes the use of poisonous gunpowder bombs, including the "wind-and-dust" bomb. During the Mongol invasions of Japan , the Mongols used the explosive "thunder-crash bombs" against the Japanese. Archaeological evidence of
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