123-663: The Airman Battle Uniform ( ABU ) is a U.S. camouflage combat uniform formerly worn by members of the United States Air Force , United States Space Force , and some civilian employees of the U.S. Department of the Air Force until April 2021. It replaced the Battle Dress Uniform and Desert Camouflage Uniform on 1 November 2011 after a four-year phase-in period. On 14 May 2018, The U.S. Air Force announced that all airmen will transition from
246-559: A Health Professions Scholarship Program scholarship or those attending the Uniformed Services University of the Health Sciences undergo OTS-A, and are commissioned as second lieutenants (O1) during their professional training. OTS-A is responsible for developing medical, legal, and chaplain personnel into professional officers by instilling character, knowledge, and motivation essential to serve in
369-403: A U.S. Army warrant officer / Army Aviator will all figure into the selection process, although the selection process strives to employ a composite or "whole person" approach. OTS applicants will be given an opportunity to apply for Air Force career fields that correspond with the applicants' expertise and/or desires and will be interviewed by active duty Air Force officers as well as receive
492-436: A background that is brighter than an animal's body or military vehicle; it is a form of active camouflage. It is notably used by some species of squid , such as the firefly squid and the midwater squid . The latter has light-producing organs ( photophores ) scattered all over its underside; these create a sparkling glow that prevents the animal from appearing as a dark shape when seen from below. Counterillumination camouflage
615-429: A clear evolutionary advantage in plants: they would tend to escape from being eaten by herbivores . Another possibility is that some plants have leaves differently coloured on upper and lower surfaces or on parts such as veins and stalks to make green-camouflaged insects conspicuous, and thus benefit the plants by favouring the removal of herbivores by carnivores. These hypotheses are testable. Some animals, such as
738-403: A combination of the two. Most forms of camouflage are ineffective when the camouflaged animal or object moves, because the motion is easily seen by the observing predator, prey or enemy. However, insects such as hoverflies and dragonflies use motion camouflage : the hoverflies to approach possible mates, and the dragonflies to approach rivals when defending territories. Motion camouflage
861-474: A direct reporting unit (DRU) under AETC. OTS, which was formerly under ATC, and Air Force ROTC, which was formerly under AU, were then realigned under both AETC and AU. Until 22 September 1993, Officer Training School was primarily located on the Medina Annex of Lackland AFB , Texas, with the last OTS class, Class 93-06, graduating from that location on that date. For a short period during the build up of
984-442: A fish can be seen by a factor of 6 compared to a fish with a nominal 2% reflectance. Species with this adaptation are widely dispersed in various orders of the phylogenetic tree of bony fishes ( Actinopterygii ), implying that natural selection has driven the convergent evolution of ultra-blackness camouflage independently many times. In mimesis (also called masquerade ), the camouflaged object looks like something else which
1107-475: A high contrast pattern that could be disruptive coloration, the adults are very conspicuous when in the open. Some authors have argued that adult giraffes are cryptic, since when standing among trees and bushes they are hard to see at even a few metres' distance. However, adult giraffes move about to gain the best view of an approaching predator, relying on their size and ability to defend themselves, even from lions, rather than on camouflage. A different explanation
1230-429: A higher pay grade), but will hold the rank of Officer Trainee versus USAF Staff Sergeant. Selection for OTS is highly competitive, with selection rates varying dependent on the needs of the Air Force. For example, boards conducted circa 2010–2012 had selection rates in the 20% range due to budgetary reductions / force reductions being imposed on the Air Force at that time. However, by 2017, selection rates had increased to
1353-674: A major general or brigadier general, while OTS had been headed by a colonel. In February 1997, in an effort to reduce duplication of effort and streamline administrative and reporting procedures within AU, AFROTC and OTS realigned under a newly created umbrella organization, Air Force Officer Accession and Training Schools (AFOATS). Under this restructuring, OTS and AFROTC were placed under the leadership of individual USAF colonels (AFJROTC and CAP were also placed under individual USAF colonels), while general officer oversight for both OTS and AFROTC, representing three-quarters of Air Force officer production,
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#17327869908711476-577: A military medical examination for flying or non-flying duty as appropriate. Applicants will then be screened by a centralized, periodic, OTS Selection Board conducted by the Air Force Recruiting Service , a component of the Air Education and Training Command . Applicants will be notified of acceptance or rejection by their recruiter pending release of the board results. If not already on active duty as enlisted personnel in
1599-519: A mirror oriented vertically makes animals such as fish invisible from the side. Most fish in the upper ocean such as sardine and herring are camouflaged by silvering. The marine hatchetfish is extremely flattened laterally, leaving the body just millimetres thick, and the body is so silvery as to resemble aluminium foil . The mirrors consist of microscopic structures similar to those used to provide structural coloration : stacks of between 5 and 10 crystals of guanine spaced about 1 ⁄ 4 of
1722-404: A particularly black skin which reflected only 0.044% of 480 nm wavelength light. The ultra-blackness is achieved with a thin but continuous layer of particles in the dermis , melanosomes . These particles both absorb most of the light, and are sized and shaped so as to scatter rather than reflect most of the rest. Modelling suggests that this camouflage should reduce the distance at which such
1845-411: A period of about 8000 years the single agouti gene developed 9 mutations that each made expression of yellow fur stronger under natural selection, and largely eliminated melanin-coding black fur coloration. On the other hand, all black domesticated cats have deletions of the agouti gene that prevent its expression, meaning no yellow or red color is produced. The evolution, history and widespread scope of
1968-502: A predator blends in with the background, enabling it to approach prey). His experiments showed that swallow-tailed moth pupae were camouflaged to match the backgrounds on which they were reared as larvae . Poulton's "general protective resemblance" was at that time considered to be the main method of camouflage, as when Frank Evers Beddard wrote in 1892 that "tree-frequenting animals are often green in colour. Among vertebrates numerous species of parrots , iguanas , tree-frogs , and
2091-409: A reason, such as to lure prey. For example, the nematocysts (stinging cells) of the transparent siphonophore Agalma okenii resemble small copepods . Examples of transparent marine animals include a wide variety of larvae , including radiata (coelenterates), siphonophores, salps (floating tunicates ), gastropod molluscs , polychaete worms, many shrimplike crustaceans , and fish; whereas
2214-693: A reproductive advantage, enabling them to leave more offspring, on average, than other members of the same species . In his Origin of Species , Darwin wrote: When we see leaf-eating insects green, and bark-feeders mottled-grey; the alpine ptarmigan white in winter, the red-grouse the colour of heather , and the black-grouse that of peaty earth, we must believe that these tints are of service to these birds and insects in preserving them from danger. Grouse, if not destroyed at some period of their lives, would increase in countless numbers; they are known to suffer largely from birds of prey ; and hawks are guided by eyesight to their prey, so much so, that on parts of
2337-705: A similar cut to the previous Battle Dress Uniform , rather than the contemporary Army Combat Uniform . The fabric was made in 50-50 nylon and cotton in order to reduce the need for summer/winter-type uniforms. On 2 October 2007, the Air Force began issuing the ABU to enlisted trainees in Basic Military Training at Lackland Air Force Base , was issued to the Class of 2012 at the United States Air Force Academy on 26 June 2008, and
2460-568: A simulated deployment environment. To graduate, cadets must meet or exceed physical standards, academic standards, and military bearing standards. Military bearing includes the ability to write and verbally brief, lead the flight, and perform duties within the Cadet Wing. Upon graduation, OTS graduates may receive either Regular or Reserve commissions as second lieutenants in the Regular United States Air Force,
2583-505: A small elastic sac, which can be stretched or allowed to relax under the control of the brain to vary its opacity. By controlling chromatophores of different colours, cephalopods can rapidly change their skin patterns and colours. On a longer timescale, animals like the Arctic hare , Arctic fox , stoat , and rock ptarmigan have snow camouflage , changing their coat colour (by moulting and growing new fur or feathers) from brown or grey in
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#17327869908712706-416: A species of nudibranch that feeds on stony coral , utilizes specific cryptic patterning in reef ecosystems. The nudibranch syphons pigments from the consumed coral into the epidermis, adopting the same shade as the consumed coral. This allows the nudibranch to change colour (mostly between black and orange) depending on the coral system that it inhabits. However, P. melanocrachia can only feed and lay eggs on
2829-657: A summer weight ABU to be available in 2012. The Improved Airman Battle Uniform will be made of a 50–50 nylon-cotton blend and was composed of the same material used by the Army for the ACU. Just like the ABU, the IABU is machine washable and also wrinkle resistant. Chief of Staff of the Air Force Gen. Norton A. Schwartz gave approval of the IABU coat and pants which will be available to trainees at Basic Military Training first. The ABU
2952-409: A wavelength apart to interfere constructively and achieve nearly 100 per cent reflection. In the deep waters that the hatchetfish lives in, only blue light with a wavelength of 500 nanometres percolates down and needs to be reflected, so mirrors 125 nanometres apart provide good camouflage. In fish such as the herring which live in shallower water, the mirrors must reflect a mixture of wavelengths, and
3075-720: Is a United States Air Force and United States Space Force commissioning program located at Maxwell Air Force Base in Montgomery, Alabama . Officer Training School is a part of the Jeanne M. Holm Center for Officer Accession and Citizen Development , formerly the Air Force Officer Accession and Training Schools (AFOATS). Named for the late Major General Jeanne M. Holm , the Holm Center falls under Air University (AU), which, in turn, falls under
3198-644: Is a 5-week course for professionals who have received a direct commission. Typically, these officers have advanced, graduate-level degrees, often masters or doctorates . Professions include chaplains , physicians ( MD or DO ), physician assistants , podiatrists , optometrists , dentists , pharmacists , clinical and counseling psychologists , nurses , social workers , lawyers , and veterinarians . They often enter at an advanced rank, such as first lieutenant (O-2) and sometimes as captain (O-3) in compensation for their higher levels of education, and in some cases, experience. Officers can be commissioned up to
3321-627: Is a five-week program primarily focused on terminal-degreed professionals (e.g., medical, lawyers, chaplains, as well as undergraduate degreed nurses) directly accessed into the USAF officer ranks. OTS-A serves all Regular Air Force, Air Force Reserve and Air National Guard non-line officers (except for Reserve and Air National Guard health professionals as noted below) and judge advocates who did not previously serve as line officers in other career fields or who were not commissioned via USAFA or AFROTC. OTS and OTS-A are conducted as parallel training programs. At
3444-404: Is a two-week orientation program focused on Air Force Reserve and Air National Guard direct commissioned officers in health-related professions, including physicians and clinical nurses. Interested applicants for OTS typically contact Air Force recruiters specializing in officer (versus enlisted) accessions. Recruiters will screen candidates, provide application details and schedule applicants for
3567-452: Is acellular and highly transparent. This conveniently makes them buoyant , but it also makes them large for their muscle mass, so they cannot swim fast, making this form of camouflage a costly trade-off with mobility. Gelatinous planktonic animals are between 50 and 90 percent transparent. A transparency of 50 percent is enough to make an animal invisible to a predator such as cod at a depth of 650 metres (2,130 ft); better transparency
3690-475: Is achieved by moving so as to stay on a straight line between the target and a fixed point in the landscape; the pursuer thus appears not to move, but only to loom larger in the target's field of vision. Some insects sway while moving to appear to be blown back and forth by the breeze. The same method can be used for military purposes, for example by missiles to minimise their risk of detection by an enemy. However, missile engineers, and animals such as bats, use
3813-433: Is an important component of camouflage in all environments. For instance, tree-dwelling parakeets are mainly green; woodcocks of the forest floor are brown and speckled; reedbed bitterns are streaked brown and buff; in each case the animal's coloration matches the hues of its habitat. Similarly, desert animals are almost all desert coloured in tones of sand, buff, ochre, and brownish grey, whether they are mammals like
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3936-436: Is argued that these juvenile giraffes must be very well camouflaged; this is supported by coat markings being strongly inherited . The possibility of camouflage in plants was little studied until the late 20th century. Leaf variegation with white spots may serve as camouflage in forest understory plants, where there is a dappled background; leaf mottling is correlated with closed habitats. Disruptive camouflage would have
4059-418: Is common in military usage, both for uniforms and for military vehicles. Disruptive patterning, however, does not always achieve crypsis on its own, as an animal or a military target may be given away by factors like shape, shine, and shadow. The presence of bold skin markings does not in itself prove that an animal relies on camouflage, as that depends on its behaviour. For example, although giraffes have
4182-424: Is divided into three programs: Officer Training School (OTS) (formerly known as Basic Officer Training (BOT) and later, Total Force Officer Training (TFOT)) is the more traditional 8-week pre-commissioning program. Previously a 13-week program later reduced to 10 weeks, the renamed TFOT track transitioned to a 9-week program in 2014 and the legacy system of Officer Trainees (OT) being designated as lower classmen in
4305-586: Is for four-year university and college graduates without prior military service (commonly known as non-prior service), as well as Active Component enlisted, Air Force Reserve enlisted, Air National Guard enlisted and former enlisted personnel from any of the six U.S. armed services with college degrees at the baccalaureate level or higher who wish to become Air Force officers. OTS serves all Active Component and Reserve Component line officers except judge advocates. Officer Training School-Abbreviated (OTS-A) (formerly known as Commissioned Officer Training (COT))
4428-435: Is fossil evidence of camouflaged insects going back over 100 million years, for example lacewings larvae that stick debris all over their bodies much as their modern descendants do, hiding them from their prey. Dinosaurs appear to have been camouflaged, as a 120 million year old fossil of a Psittacosaurus has been preserved with countershading . Camouflage does not have a single genetic origin. However, studying
4551-403: Is implied by young giraffes being far more vulnerable to predation than adults. More than half of all giraffe calves die within a year, and giraffe mothers hide their newly born calves, which spend much of the time lying down in cover while their mothers are away feeding. The mothers return once a day to feed their calves with milk. Since the presence of a mother nearby does not affect survival, it
4674-708: Is intended to greatly increase user comfort through the use of lightweight, moisture-wicking, and breathable fabrics. The ABS features the same tiger stripe pattern on the sleeves. In 2010, the Operation Enduring Freedom Pattern Army Combat Uniform was authorized to replace the Airman Battle Uniform for airmen in the War in Afghanistan. In June 2011, The Air Force Times released the announcement of
4797-525: Is less often used for military camouflage, despite Second World War experiments that showed its effectiveness. English zoologist Hugh Cott encouraged the use of methods including countershading, but despite his authority on the subject, failed to persuade the British authorities. Soldiers often wrongly viewed camouflage netting as a kind of invisibility cloak, and they had to be taught to look at camouflage practically, from an enemy observer's viewpoint. At
4920-434: Is mediated by a type of chromatophore known as melanophores that contain dark pigment. A melanophore is star-shaped; it contains many small pigmented organelles which can be dispersed throughout the cell, or aggregated near its centre. When the pigmented organelles are dispersed, the cell makes a patch of the animal's skin appear dark; when they are aggregated, most of the cell, and the animal's skin, appears light. In frogs,
5043-540: Is not every reason to believe it the very best conceivable device for the concealment of its wearer", and using paintings such as Peacock in the Woods (1907) to reinforce his argument. Thayer was roundly mocked for these views by critics including Teddy Roosevelt . The English zoologist Hugh Cott 's 1940 book Adaptive Coloration in Animals corrected Thayer's errors, sometimes sharply: "Thus we find Thayer straining
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5166-417: Is of no special interest to the observer. Mimesis is common in prey animals, for example when a peppered moth caterpillar mimics a twig, or a grasshopper mimics a dry leaf. It is also found in nest structures; some eusocial wasps, such as Leipomeles dorsata , build a nest envelope in patterns that mimic the leaves surrounding the nest. Officer Training School Officer Training School ( OTS )
5289-739: Is possible that some plants use camouflage to evade being eaten by herbivores . Military camouflage was spurred by the increasing range and accuracy of firearms in the 19th century. In particular the replacement of the inaccurate musket with the rifle made personal concealment in battle a survival skill. In the 20th century, military camouflage developed rapidly, especially during the First World War . On land, artists such as André Mare designed camouflage schemes and observation posts disguised as trees. At sea , merchant ships and troop carriers were painted in dazzle patterns that were highly visible, but designed to confuse enemy submarines as to
5412-463: Is required for invisibility in shallower water, where the light is brighter and predators can see better. For example, a cod can see prey that are 98 percent transparent in optimal lighting in shallow water. Therefore, sufficient transparency for camouflage is more easily achieved in deeper waters. Some tissues such as muscles can be made transparent, provided either they are very thin or organised as regular layers or fibrils that are small compared to
5535-483: Is the likely function of the bioluminescence of many marine organisms, though light is also produced to attract or to detect prey and for signalling. Counterillumination has rarely been used for military purposes. " Diffused lighting camouflage " was trialled by Canada's National Research Council during the Second World War. It involved projecting light on to the sides of ships to match the faint glow of
5658-428: Is their mutual resemblance." He also explained the coloration of sea fish such as the mackerel : "Among pelagic fish it is common to find the upper surface dark-coloured and the lower surface white, so that the animal is inconspicuous when seen either from above or below." The artist Abbott Handerson Thayer formulated what is sometimes called Thayer's Law, the principle of countershading . However, he overstated
5781-474: Is thought to have originated through transposition from symbiotic Aliivibrio fischeri bacteria, which provide bioluminescence to its hosts. While not all cephalopods use active camouflage , ancient cephalopods may have inherited the gene horizontally from symbiotic A. fischeri , with divergence occurred through subsequent gene duplication (such as in the case of Sepia officinalis ) or gene loss (as with cephalopods with no active camouflage capabilities). This
5904-640: Is unique as an instance of camouflage arising as an instance of horizontal gene transfer from an endosymbiont . However, other methods of horizontal gene transfer are common in the evolution of camouflage strategies in other lineages. Peppered moths and walking stick insects both have camouflage-related genes that stem from transposition events. The Agouti genes are orthologous genes involved in camouflage across many lineages. They produce yellow and red coloration ( phaeomelanin ), and work in competition with other genes that produce black (melanin) and brown (eumelanin) colours. In eastern deer mice , over
6027-620: Is worn with dark blue background and light silver lettering name and branch tapes and black boots in order to distinguish CAP personnel. All airmen have been authorized to wear the Operational Camouflage Pattern instead of ABUs since 1 October 2018. Recruits in basic training and cadets in Air Force Reserve Officer Training Corps, and Officer Training School started being issued OCPs on 1 October 2019. The Airman Battle Uniform
6150-610: The Air Education and Training Command ( AETC ), an Air Force major command (MAJCOM) . In addition to OTS, the Holm Center also has oversight responsibilities for the Air Force Reserve Officer Training Corps ( AFROTC ) pre-commissioning program on U.S. colleges and universities, the Air Force Junior Reserve Officer Training Corps (AFJROTC) citizen development program in U.S. high schools, and
6273-568: The Air Force Officer Qualifying Test (AFOQT). The AFOQT covers numerous test batteries assessing math, verbal, and analytical skills, as well as measuring pilot and navigator/combat systems officer potential for those applicants aspiring to be aeronautically rated officers. AFOQT scores, college GPA, previous enlisted performance evaluations if a current or former enlisted member, and, if applicable, previous pilot skills as either an FAA-certified civilian pilot and/or as
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#17327869908716396-726: The Aviation Cadet (AvCad) Program proved insufficient to meet wartime commissioned officer requirements, the United States Army Air Forces established the Officer Candidate School (OCS) on 23 February 1942 at Miami Beach, Florida , its mission being to train and commission members from the enlisted ranks. OCS moved to the San Antonio Aviation Cadet Center (now Lackland AFB ), Texas, in 1944 and gained
6519-548: The gerbil or fennec fox , birds such as the desert lark or sandgrouse , or reptiles like the skink or horned viper . Military uniforms, too, generally resemble their backgrounds; for example khaki uniforms are a muddy or dusty colour, originally chosen for service in South Asia. Many moths show industrial melanism , including the peppered moth which has coloration that blends in with tree bark. The coloration of these insects evolved between 1860 and 1940 to match
6642-409: The green tree-snake are examples". Beddard did however briefly mention other methods, including the "alluring coloration" of the flower mantis and the possibility of a different mechanism in the orange tip butterfly . He wrote that "the scattered green spots upon the under surface of the wings might have been intended for a rough sketch of the small flowerets of the plant [an umbellifer ], so close
6765-401: The horned lizards of North America, have evolved elaborate measures to eliminate shadow . Their bodies are flattened, with the sides thinning to an edge; the animals habitually press their bodies to the ground; and their sides are fringed with white scales which effectively hide and disrupt any remaining areas of shadow there may be under the edge of the body. The theory that the body shape of
6888-442: The leopard 's spotted coat, the battledress of a modern soldier , and the leaf-mimic katydid 's wings. A third approach, motion dazzle, confuses the observer with a conspicuous pattern, making the object visible but momentarily harder to locate. The majority of camouflage methods aim for crypsis, often through a general resemblance to the background, high contrast disruptive coloration , eliminating shadow, and countershading . In
7011-402: The 65% range or greater, reflecting the increased commissioned officer needs of the service. Per Air Force Instruction (AFI) 36-2013, personnel attending Officer Training School's 8-week program must have a baccalaureate level degree or higher in either technical or non-technical fields. Technical fields may include any ABET -accredited engineering degree or other fields in high demand by
7134-547: The Air Force Reserve, or the Air National Guard, as appropriate to their original source of entry and contract. The new second lieutenants will be appointed in either pay grade O-1, or O-1E if they have prior cumulative active service as a warrant officer or as an enlisted servicemember in any branch or component of the U.S. armed forces for at least 4 years and 1 day. If any portion of their prior service
7257-520: The Air Force cuts when they have a surplus of cadets through the other two sources. Given this reality, OTS has often surpassed USAFA officer production during wartime periods such as during the Vietnam War in the 1960s and early 1970s or the Reagan defense buildup of the 1980s. Conversely, OTS can be hard to get into during years of contraction within the national defense establishment in general and
7380-603: The Air Force in particular, such as the mid and late 1970s following the end of the Vietnam War and associated USAF force structure reductions or the post- Cold War era and its associated defense reductions of the early and mid-1990s. During these periods of contractions, OTS produces few officers, making selection for the OTS program particularly difficult and competitive for college graduates, especially those with no prior enlisted service, particularly USAF enlisted service. OTS
7503-499: The Air Force to meet the demands of the Vietnam War, as many as three OTS Squadrons were based directly at Lackland AFB. During the spring and summer of 1993, OTS gradually relocated to Maxwell AFB, Alabama , the home of Air University, commencing operations in interim facilities on 25 September 1993. Historically, the USAF Academy had been (and continues to be) headed by a lieutenant general and Air Force ROTC had been headed by
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#17327869908717626-954: The Air Force. Non-technical degrees are more common, and therefore applying with a degree in such a field is very competitive. Applicants can apply for aeronautically rated or non-rated Line Officer of the Air Force ( LAF ) positions. Rated positions are flying related -- Pilot , Combat Systems Officer (previously known as Navigator), Remotely-Piloted Aircraft (RPA) Pilot, or Air Battle Manager . Non-rated positions fall into two categories: non-rated operations , such as missiles, intelligence, space, cyber, or weather, and non-rated support , such as aircraft maintenance, missile maintenance, logistics, civil engineer, security forces, or communications. Areas of instruction at OTS include military customs and courtesies, military history , Air Force traditions and culture, leadership, field exercises, drill and ceremonies, small arms training, and combatives. The first few weeks of training are geared toward orienting
7749-611: The Airman Battle Uniform to the OCP Uniform . All airmen have been permitted to wear the OCP Uniform since 1 October 2018, and the wear out date for the ABU was 1 April 2021. The ABU is currently worn by the Civil Air Patrol . The first prototype of the ABU was unveiled in the summer of 2003. The early uniform prototypes consisted of trousers, an embroidered undershirt, and a blouse. The prototype camouflage pattern
7872-600: The British army having adopted "coats of motley hue and stripes of paint" for snipers. Cott takes the example of the larva of the blotched emerald moth, which fixes a screen of fragments of leaves to its specially hooked bristles, to argue that military camouflage uses the same method, pointing out that the "device is ... essentially the same as one widely practised during the Great War for the concealment, not of caterpillars, but of caterpillar-tractors, [gun] battery positions, observation posts and so forth." Movement catches
7995-663: The Continent persons are warned not to keep white pigeons, as being the most liable to destruction. Hence I can see no reason to doubt that natural selection might be most effective in giving the proper colour to each kind of grouse, and in keeping that colour, when once acquired, true and constant. The English zoologist Edward Bagnall Poulton studied animal coloration , especially camouflage. In his 1890 book The Colours of Animals , he classified different types such as "special protective resemblance" (where an animal looks like another object), or "general aggressive resemblance" (where
8118-584: The United States Air Force. The 23rd Training Squadron (23 TRS) provides a 23-training day Commissioned Officer Training course to instill leadership and officership skills in newly commissioned medical officers, judge advocates, and chaplains. The 23 TRS also conducts a 13-training day Reserve Commissioned Officer Orientation (RCOO) program for hard-to-recruit medical officers in the Air Force Reserve and Air National Guard . When
8241-552: The additional mission of training officers directly from civilian status in September 1951. OTS was organized at Lackland AFB, Texas, in November 1959, with the first OTS class (60-A) composed of 89 officer trainees, including 11 women, who graduated and were commissioned as 2nd Lieutenants on 9 February 1960. The number of OTS graduates has varied over the years, from 323 the first year to a high of 7,894 officers in 1967. With
8364-409: The adults of most of these are opaque and pigmented, resembling the seabed or shores where they live. Adult comb jellies and jellyfish obey the rule, often being mainly transparent. Cott suggests this follows the more general rule that animals resemble their background: in a transparent medium like seawater, that means being transparent. The small Amazon River fish Microphilypnus amazonicus and
8487-483: The agouti gene shows that different organisms often rely on orthologous or even identical genes to develop a variety of camouflage strategies. While camouflage can increase an organism's fitness, it has genetic and energetic costs. There is a trade-off between detectability and mobility. Species camouflaged to fit a specific microhabitat are less likely to be detected when in that microhabitat, but must spend energy to reach, and sometimes to remain in, such areas. Outside
8610-535: The armed forces, selectees for OTS will subsequently enlist in the Air Force Reserve via the Delayed Enlistment Program and will be assigned an OTS class date. Non-prior service college graduates will enlist in the rank of Airman 1st Class (E-3) while prior service enlisted personnel will be enlisted in their current or highest prior pay grade. Upon arrival at OTS, all personnel will be advanced to pay grade E-5 (unless prior enlisted already holding
8733-467: The basics of marching and drill and ceremonies. Officer Trainees were also re-designated as Cadets in 2015, again on par with USAFA and AFROTC and reminiscent of the Aviation Cadet program in operation in USAF and its predecessor incarnations (e.g., USAAS , USAAC , USAAF , etc.) from 1907 until 1965. As of 2019, the class is an 8-week program and students are once again referred to as Officer Trainees. OTS
8856-574: The beginning of a new class, OTS and OTS-A students live and train together in integrated flights. After five weeks, the already-commissioned OTS-A students that have successfully completed the course graduate and move on to either follow-on technical training or their initial assignments. The remaining OTS students complete several other graduation requirements over the final three weeks of the course before graduating and receiving their commissions. Reserve Commissioned Officer Orientation (RCOO) (formerly known as Reserve Commissioned Officer Training (RCOT))
8979-438: The body outline, making it harder to precisely identify and locate. However, disruptive patterns result in higher predation. Disruptive patterns that specifically involve visible symmetry (such as in some butterflies) reduce survivability and increase predation. Some researchers argue that because wing-shape and color pattern are genetically linked, it is genetically costly to develop asymmetric wing colorations that would enhance
9102-456: The body. On these, the nymph spreads an inner layer of fine particles and an outer layer of coarser particles. The camouflage may conceal the bug from both predators and prey. Similar principles can be applied for military purposes, for instance when a sniper wears a ghillie suit designed to be further camouflaged by decoration with materials such as tufts of grass from the sniper's immediate environment. Such suits were used as early as 1916,
9225-442: The branches of host-coral, Platygyra carnosa , which limits the geographical range and efficacy in nudibranch nutritional crypsis. Furthermore, the nudibranch colour change is not immediate, and switching between coral hosts when in search for new food or shelter can be costly. The costs associated with distractive or disruptive crypsis are more complex than the costs associated with background matching. Disruptive patterns distort
9348-487: The cadet with Air Force standards. The focus is on physical training, drill and ceremonies, and academics. Cadets will be expected to work with their fellow flight and squadron members to accomplish specific tasks as required by their Flight Commander and the Cadet Wing. They will also attend multiple classes in an academic environment. Later in the program they will attend field training exercises, projects, small arms training, and building team skills by overcoming challenges in
9471-457: The camouflage consists of two surfaces, each with the simple function of providing concealment against a specific background, such as a bright water surface or the sky. The body of a shark or the fuselage of an aircraft is not gradated from light to dark to appear flat when seen from the side. The camouflage methods used are the matching of background colour and pattern, and disruption of outlines. Counter-illumination means producing light to match
9594-468: The case in the 1909 book Concealing-Coloration in the Animal Kingdom , arguing that "All patterns and colors whatsoever of all animals that ever preyed or are preyed on are under certain normal circumstances obliterative" (that is, cryptic camouflage), and that "Not one ' mimicry ' mark, not one ' warning color '... nor any ' sexually selected ' color, exists anywhere in the world where there
9717-403: The change is controlled relatively slowly, mainly by hormones . In fish, the change is controlled by the brain, which sends signals directly to the chromatophores, as well as producing hormones. The skins of cephalopods such as the octopus contain complex units, each consisting of a chromatophore with surrounding muscle and nerve cells. The cephalopod chromatophore has all its pigment grains in
9840-411: The changing colour of the tree trunks on which they rest, from pale and mottled to almost black in polluted areas. This is taken by zoologists as evidence that camouflage is influenced by natural selection , as well as demonstrating that it changes where necessary to resemble the local background. Disruptive patterns use strongly contrasting, non-repeating markings such as spots or stripes to break up
9963-540: The colour-changing abilities, both for camouflage and for signalling , of cephalopods including the octopus, in his Historia animalium : The octopus ... seeks its prey by so changing its colour as to render it like the colour of the stones adjacent to it; it does so also when alarmed . Camouflage has been a topic of interest and research in zoology for well over a century. According to Charles Darwin 's 1859 theory of natural selection , features such as camouflage evolved by providing individual animals with
10086-411: The combination of behaviours and other methods of crypsis involved, young giraffes seek cover, lie down, and keep still, often for hours until their mothers return; their skin pattern blends with the pattern of the vegetation, while the chosen cover and lying position together hide the animals' shadows. The flat-tail horned lizard similarly relies on a combination of methods: it is adapted to lie flat in
10209-504: The countershaded animal nearly invisible against a suitable background. Thayer observed that "Animals are painted by Nature, darkest on those parts which tend to be most lighted by the sky's light, and vice versa ". Accordingly, the principle of countershading is sometimes called Thayer's Law . Countershading is widely used by terrestrial animals , such as gazelles and grasshoppers; marine animals, such as sharks and dolphins ; and birds, such as snipe and dunlin . Countershading
10332-490: The current Commandant of OTS (OTS/CMDT) is Colonel Keolani W. Bailey, USAF. During peacetime, OTS is usually the smallest commissioning source in the USAF, producing fewer officers per year than AFROTC and the United States Air Force Academy ( USAFA ). However, it possesses the capability to surge when USAF requirements dictate and exceed the combined annual officer production of both USAFA and AFROTC. Given its shorter lead time for officer production (currently 8.5 weeks versus
10455-496: The early part of the program and upper classmen in the latter part, similar to their USAFA and AFROTC counterparts, was eliminated. This was further reduced to the current 8-week program in 2017 by removing the Total Force Indoctrination Training (TFIT) from the first week of the course in which Military Training Instructors (MTIs) would teach the customs and standards of the Air Force as well as
10578-502: The efficacy of disruptive cryptic patterning. Symmetry does not carry a high survival cost for butterflies and moths that their predators views from above on a homogeneous background, such as the bark of a tree. On the other hand, natural selection drives species with variable backgrounds and habitats to move symmetrical patterns away from the centre of the wing and body, disrupting their predators' symmetry recognition. Camouflage can be achieved by different methods, described below. Most of
10701-474: The entire Civil Air Patrol , both its senior member program as the U.S. Air Force Auxiliary (focused on search and rescue and other emergency services and disaster support), and its aerospace education and citizen development cadet program (similar to the AFJROTC cadet program) via its HQ CAP-USAF activity. The current Commander of the Holm Center (Holm Ctr/CC) is Brigadier General Houston R. Cantwell, USAF and
10824-542: The establishment of OTS, Air Force OCS closed its doors and conducted its last graduation in June 1963. Concurrently, the Air Force also commenced a phaseout of its long-standing Aviation Cadet (AvCad) Program at Lackland AFB. Unlike OTS, AvCad was limited to pilot and navigator candidates. In addition, AvCads had to successfully complete either undergraduate pilot training or undergraduate navigator training before they could be commissioned as Second Lieutenants. The last AvCad pilot
10947-419: The eye of prey animals on the lookout for predators, and of predators hunting for prey. Most methods of crypsis therefore also require suitable cryptic behaviour, such as lying down and keeping still to avoid being detected, or in the case of stalking predators such as the tiger , moving with extreme stealth, both slowly and quietly, watching its prey for any sign they are aware of its presence. As an example of
11070-400: The features of their bodies, and to match their backgrounds. For example, a caddisfly larva builds a decorated case and lives almost entirely inside it; a decorator crab covers its back with seaweed, sponges, and stones. The nymph of the predatory masked bug uses its hind legs and a ' tarsal fan' to decorate its body with sand or dust. There are two layers of bristles ( trichomes ) over
11193-738: The fish accordingly has crystal stacks with a range of different spacings. A further complication for fish with bodies that are rounded in cross-section is that the mirrors would be ineffective if laid flat on the skin, as they would fail to reflect horizontally. The overall mirror effect is achieved with many small reflectors, all oriented vertically. Silvering is found in other marine animals as well as fish. The cephalopods , including squid, octopus and cuttlefish, have multilayer mirrors made of protein rather than guanine. Some deep sea fishes have very black skin, reflecting under 0.5% of ambient light. This can prevent detection by predators or prey fish which use bioluminescence for illumination. Oneirodes had
11316-482: The genetic components and various ecological pressures that drive crypsis. Camouflage is a soft-tissue feature that is rarely preserved in the fossil record, but rare fossilised skin samples from the Cretaceous period show that some marine reptiles were countershaded. The skins, pigmented with dark-coloured eumelanin , reveal that both leatherback turtles and mosasaurs had dark backs and light bellies. There
11439-436: The genetic components of camouflage in specific organisms illuminates the various ways that crypsis can evolve among lineages. Many cephalopods have the ability to actively camouflage themselves, controlling crypsis through neural activity. For example, the genome of the common cuttlefish includes 16 copies of the reflectin gene, which grants the organism remarkable control over coloration and iridescence. The reflectin gene
11562-399: The horned lizards which live in open desert is adapted to minimise shadow is supported by the one species which lacks fringe scales, the roundtail horned lizard , which lives in rocky areas and resembles a rock. When this species is threatened, it makes itself look as much like a rock as possible by curving its back, emphasizing its three-dimensional shape. Some species of butterflies, such as
11685-423: The local environment. As there is a lack of evidence for camouflage in the fossil record, studying the evolution of camouflage strategies is very difficult. Furthermore, camouflage traits must be both adaptable (provide a fitness gain in a given environment) and heritable (in other words, the trait must undergo positive selection ). Thus, studying the evolution of camouflage strategies requires an understanding of
11808-534: The method mainly for its efficiency rather than camouflage. Animals such as chameleon , frog, flatfish such as the peacock flounder , squid, octopus and even the isopod idotea balthica actively change their skin patterns and colours using special chromatophore cells to resemble their current background, or, as in most chameleons, for signalling . However, Smith's dwarf chameleon does use active colour change for camouflage. Each chromatophore contains pigment of only one colour. In fish and frogs, colour change
11931-428: The methods help to hide against a background; but mimesis and motion dazzle protect without hiding. Methods may be applied on their own or in combination. Many mechanisms are visual, but some research has explored the use of techniques against olfactory (scent) and acoustic (sound) detection. Methods may also apply to military equipment. Some animals' colours and patterns match a particular natural background. This
12054-466: The microhabitat, the organism has a higher chance of detection. Generalized camouflage allows species to avoid predation over a wide range of habitat backgrounds, but is less effective. The development of generalized or specialized camouflage strategies is highly dependent on the biotic and abiotic composition of the surrounding environment. There are many examples of the tradeoffs between specific and general cryptic patterning. Phestilla melanocrachia ,
12177-538: The night sky, requiring awkward external platforms to support the lamps. The Canadian concept was refined in the American Yehudi lights project, and trialled in aircraft including B-24 Liberators and naval Avengers . The planes were fitted with forward-pointing lamps automatically adjusted to match the brightness of the night sky. This enabled them to approach much closer to a target – within 3,000 yards (2,700 m) – before being seen. Counterillumination
12300-514: The open desert, relying on stillness, its cryptic coloration, and concealment of its shadow to avoid being noticed by predators. In the ocean, the leafy sea dragon sways mimetically, like the seaweeds amongst which it rests, as if rippled by wind or water currents. Swaying is seen also in some insects, like Macleay's spectre stick insect, Extatosoma tiaratum . The behaviour may be motion crypsis, preventing detection, or motion masquerade, promoting misclassification (as something other than prey), or
12423-442: The open ocean, where there is no background, the principal methods of camouflage are transparencying, silveringing, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid . Some animals, such as chameleons and octopuses , are capable of actively changing their skin pattern and colors , whether for camouflage or for signalling. It
12546-408: The outlines of an animal or military vehicle, or to conceal telltale features, especially by masking the eyes , as in the common frog . Disruptive patterns may use more than one method to defeat visual systems such as edge detection . Predators like the leopard use disruptive camouflage to help them approach prey, while potential prey use it to avoid detection by predators. Disruptive patterning
12669-495: The rank of colonel (O-6) if they possess the level of experience necessary. With the exception of those officers previously commissioned as line officers through USAFA, AFROTC, the 8-week program of OTS, or the Air Force Nurse program of AFROTC, most chaplains , judge advocates general (i.e., lawyers), and medical personnel go through OTS-A. Medical students and related medical professions students that have received
12792-474: The same time in Australia , zoologist William John Dakin advised soldiers to copy animals' methods, using their instincts for wartime camouflage. The term countershading has a second meaning unrelated to "Thayer's Law". It is that the upper and undersides of animals such as sharks, and of some military aircraft, are different colours to match the different backgrounds when seen from above or from below. Here
12915-467: The shrimps it associates with, Pseudopalaemon gouldingi , are so transparent as to be "almost invisible"; further, these species appear to select whether to be transparent or more conventionally mottled (disruptively patterned) according to the local background in the environment. Where transparency cannot be achieved, it can be imitated effectively by silvering to make an animal's body highly reflective. At medium depths at sea, light comes from above, so
13038-477: The sides of a tank. The Peltier plate panels are heated and cooled to match either the vehicle's surroundings (crypsis), or an object such as a car (mimesis), when viewed in infrared. Countershading uses graded colour to counteract the effect of self-shadowing, creating an illusion of flatness. Self-shadowing makes an animal appear darker below than on top, grading from light to dark; countershading 'paints in' tones which are darkest on top, lightest below, making
13161-401: The sleeves are authorized to be rolled up. Overview of the Airman Battle Uniform is as follows: Backpacks and other accessories must be sage, black, or ABU pattern. Camouflage Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include
13284-462: The speckled wood, Pararge aegeria , minimise their shadows when perched by closing the wings over their backs, aligning their bodies with the sun, and tilting to one side towards the sun, so that the shadow becomes a thin inconspicuous line rather than a broad patch. Similarly, some ground-nesting birds, including the European nightjar , select a resting position facing the sun. Eliminating shadow
13407-722: The summer to white in the winter; the Arctic fox is the only species in the dog family to do so. However, Arctic hares which live in the far north of Canada , where summer is very short, remain white year-round. The principle of varying coloration either rapidly or with the changing seasons has military applications. Active camouflage could in theory make use of both dynamic colour change and counterillumination. Simple methods such as changing uniforms and repainting vehicles for winter have been in use since World War II. In 2011, BAE Systems announced their Adaptiv infrared camouflage technology. It uses about 1,000 hexagonal panels to cover
13530-835: The target's speed, range, and heading. During and after the Second World War , a variety of camouflage schemes were used for aircraft and for ground vehicles in different theatres of war. The use of radar since the mid-20th century has largely made camouflage for fixed-wing military aircraft obsolete. Non-military use of camouflage includes making cell telephone towers less obtrusive and helping hunters to approach wary game animals. Patterns derived from military camouflage are frequently used in fashion clothing, exploiting their strong designs and sometimes their symbolism. Camouflage themes recur in modern art, and both figuratively and literally in science fiction and works of literature. In ancient Greece, Aristotle (384–322 BC) commented on
13653-470: The theory to a fantastic extreme in an endeavour to make it cover almost every type of coloration in the animal kingdom." Cott built on Thayer's discoveries, developing a comprehensive view of camouflage based on "maximum disruptive contrast", countershading and hundreds of examples. The book explained how disruptive camouflage worked, using streaks of boldly contrasting colour, paradoxically making objects less visible by breaking up their outlines. While Cott
13776-411: The typically 4-year pre-commissioning process for USAFA and AFROTC cadets), OTS is the commissioning source used to balance out USAF officer manning as deemed necessary by the Air Force. The number of officers commissioned through OTS fluctuates considerably as their numbers are largely influenced by the number of graduating cadets through the USAF Academy and AFROTC, as well as being the first place
13899-508: The wavelength of visible light. A familiar example is the transparency of the lens of the vertebrate eye , which is made of the protein crystallin , and the vertebrate cornea which is made of the protein collagen . Other structures cannot be made transparent, notably the retinas or equivalent light-absorbing structures of eyes – they must absorb light to be able to function. The camera -type eye of vertebrates and cephalopods must be completely opaque. Finally, some structures are visible for
14022-555: Was a blue/gray, tigerstripe pattern, based upon the tigerstripe uniforms worn by airmen during the Vietnam War . After months of wear testing, Air Force officials revised the color scheme and camouflage pattern due to feedback received from airmen. The new semi-pixelated tiger-stripe pattern would trade its dominant blue overtones for a more subdued palette, similar to the Universal Camouflage Pattern , but with some added slate blue tones. The uniform maintains
14145-544: Was commissioned in October 1961 at the former Reese AFB , Texas, and the last AvCad navigator was commissioned in March 1965, at the former James Connally AFB , Texas. OTS then became the sole organization for training future Air Force officers at Lackland AFB. On 1 July 1993, Air Training Command (ATC) merged with Air University (AU) to form the new Air Education and Training Command (AETC), with Air University becoming
14268-570: Was fully phased in on 1 October 2011, completely replacing the BDU and DCU though most airmen had been wearing the ABU for several years by that point. The Air Force's civilian auxiliary, Civil Air Patrol , wear-tested the ABU in late 2015, and in May 2016, the national commander of the Civil Air Patrol issued a memorandum allowing the wear of the ABU effective 15 June 2016. However, the uniform
14391-682: Was identified as a principle of military camouflage during the Second World War . Many prey animals have conspicuous high-contrast markings which paradoxically attract the predator's gaze. These distractive markings may serve as camouflage by distracting the predator's attention from recognising the prey as a whole, for example by keeping the predator from identifying the prey's outline. Experimentally, search times for blue tits increased when artificial prey had distractive markings. Some animals actively seek to hide by decorating themselves with materials such as twigs, sand, or pieces of shell from their environment, to break up their outlines, to conceal
14514-476: Was in a reserve component and not served in an active duty status, then inactive duty reserve retirement points may be used to qualify for O-1E. If the combination of creditable active duty days and inactive duty points equals 1,460 (equivalent to exactly 4 years and 1 day of cumulative qualifying active and inactive duty), the pay grade O-1E is assigned, which is a significantly higher starting basic pay level than O-1, and remains higher until promoted to O-4. OTS-A
14637-689: Was made available for all airmen. Since 2008, it has been issued to airmen deploying to locations in the CENTCOM area of responsibility. Starting in 2009, airmen who were in ground combat roles, such as Security Forces , were issued the new Airman Battle Shirt (ABS). The ABS was based on the Army Combat Shirt (ACS). Like the ACS, the ABS is a stand-alone shirt designed specifically for use with Improved Outer Tactical Vest armor in warm and hot weather. It
14760-464: Was made obsolete by radar , and neither diffused lighting camouflage nor Yehudi lights entered active service. Many marine animals that float near the surface are highly transparent , giving them almost perfect camouflage. However, transparency is difficult for bodies made of materials that have different refractive indices from seawater. Some marine animals such as jellyfish have gelatinous bodies, composed mainly of water; their thick mesogloea
14883-498: Was more systematic and balanced in his view than Thayer, and did include some experimental evidence on the effectiveness of camouflage, his 500-page textbook was, like Thayer's, mainly a natural history narrative which illustrated theories with examples. Experimental evidence that camouflage helps prey avoid being detected by predators was first provided in 2016, when ground-nesting birds ( plovers and coursers ) were shown to survive according to how well their egg contrast matched
15006-539: Was no longer authorized to wear after 1 April 2021. A limited number of Ukrainian Armed Forces personnel have been photographed wearing the ABU during the 2022 Russian invasion of Ukraine . The Airman Battle Uniform is similar to the Universal Camouflage Pattern (UCP) in color, with the inclusion of slate blue, but is otherwise nearly identical to the BDU cut. The ABU is to be worn with sage green combat boots . The ABU does have essential NIR (near-infra red) qualities, and
15129-712: Was placed under one command, the AFOATS commander, a brigadier general. In the late 1990s, a $ 52 million military construction (MILCON) project commenced to build a new, dedicated OTS campus at Maxwell AFB to replace the interim facilities initially occupied in late 1993. The majority of this MILCON project was completed in 2001 and all projects relating to the Maxwell AFB OTS campus were completed by 2004. AFROTC, which had previously conducted its summer Field Training (FT) program for their cadets between their sophomore and junior academic years at various air force bases around
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