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52-490: Naval Air Facility El Centro or NAF El Centro ( IATA : NJK , ICAO : KNJK , FAA LID : NJK ) is a United States Navy Naval Air Facility located approximately six miles (10 km) northwest of El Centro , in Imperial County, California . NAF El Centro is under the jurisdiction of Navy Region Southwest and serves both as temporary homeport to military units conducting air-to-air and bombing training, and as

104-540: A dogfight can be executed in an infinite number of geometric planes. Pilots are encouraged to keep their manoeuvres out of the strictly vertical and horizontal planes, but to instead use the limitless number of oblique planes, which is much harder for an adversary to track. This infinite number of planes around a fixed point about which the aircraft turns is termed the "post and bubble". A fighter that can maintain position between an aircraft and its imaginary post cannot be attacked by that aircraft. The imaginary bubble, however,

156-399: A fast moving attacker to slow his closing speed. An attacker is confronted with three possible ways to pursue an enemy, all of which are vital during chase. "Lag pursuit" happens in a turn when the nose of the attacker's aircraft points behind an enemy's tail. Lag pursuit allows an attacker to increase or maintain range without overshooting . "Lead pursuit" in a turn occurs when the nose of

208-420: A higher altitude than the opponent. Most of these rules are still as valuable today as they were a century ago. Today's air combat is much more complicated than that of older times, as air-to-air missiles , radar , and automatic cannons capable of high rates of fire are used on nearly all modern fighter aircraft. New and additional types of manoeuvres have emerged, intending to break radar lock by minimizing

260-567: A new airport is built, replacing the old one, leaving the city's new "major" airport (or the only remaining airport) code to no longer correspond with the city's name. The original airport in Nashville, Tennessee, was built in 1936 as part of the Works Progress Administration and called Berry Field with the designation, BNA. A new facility known as Nashville International Airport was built in 1987 but still uses BNA. This

312-449: A pilot will often make trade offs between the fighter's potential energy (altitude) and kinetic energy (airspeed), to maintain the energy-to-weight ratio of the aircraft, or the "specific energy". A manoeuvre such as the " low yo-yo " trades altitude for airspeed to close on an enemy and to decrease turn radius. The opposite manoeuvre, a " high yo-yo ", trades speed for height, literally storing energy in "the altitude bank", which allows

364-535: A separate census-designated place (CDP) for statistical purposes, covering the residential population. It first appeared as a CDP in the 2020 Census with a population of 280. Much of the movie Jarhead was filmed around El Centro, and many of the extras from the movie were from NAF El Centro. In the beginning of the 1990 movie Revenge , Kevin Costner plays an F-14 Tomcat pilot stationed at El Centro. IATA airport code The assignment of these codes

416-468: A wide variety of other terms, usually coined by air crew. This type of combat became known as dogfighting . Oswald Boelcke , a German fighter ace during World War I, was the first to publish the basic rules for aerial combat manoeuvring in 1916, known as the Dicta Boelcke . He advised pilots to attack from the direction of the sun (toward which the defending pilot could not see), or to fly at

468-509: Is GSN and its IATA code is SPN, and some coincide with IATA codes of non-U.S. airports. Canada's unusual codes—which bear little to no similarity with any conventional abbreviation to the city's name—such as YUL in Montréal , and YYZ in Toronto , originated from the two-letter codes used to identify weather reporting stations in the 1930s. The letters preceding the two-letter code follow

520-630: Is also home to the British Joint Helicopter Force (US) which is part of Joint Helicopter Command . NAF El Centro is the winter home of the U.S. Navy Flight Demonstration Squadron, The Blue Angels . NAF El Centro historically kicks off the Blue Angels' season with their first air show. The United States Census Bureau has designated the Naval Air Facility, under the name El Centro Naval Air Facility, as

572-617: Is available. However, many railway administrations have their own list of codes for their stations, such as the list of Amtrak station codes . Airport codes arose out of the convenience that the practice brought pilots for location identification in the 1930s. Initially, pilots in the United States used the two-letter code from the National Weather Service (NWS) for identifying cities. This system became unmanageable for cities and towns without an NWS identifier, and

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624-523: Is different from the name in English, yet the airport code represents only the English name. Examples include: Due to scarcity of codes, some airports are given codes with letters not found in their names: The use of 'X' as a filler letter is a practice to create three-letter identifiers when more straightforward options were unavailable: Some airports in the United States retained their NWS ( National Weather Service ) codes and simply appended an X at

676-671: Is governed by IATA Resolution 763, and it is administered by the IATA's headquarters in Montreal , Canada. The codes are published semi-annually in the IATA Airline Coding Directory. IATA provides codes for airport handling entities, and for certain railway stations. Alphabetical lists of airports sorted by IATA code are available. A list of railway station codes , shared in agreements between airlines and rail lines such as Amtrak , SNCF , and Deutsche Bahn ,

728-513: Is in conjunction to rules aimed to avoid confusion that seem to apply in the United States, which state that "the first and second letters or second and third letters of an identifier may not be duplicated with less than 200 nautical miles separation." Thus, Washington, D.C. area's three airports all have radically different codes: IAD for Washington–Dulles , DCA for Washington–Reagan (District of Columbia Airport), and BWI for Baltimore (Baltimore–Washington International, formerly BAL). Since HOU

780-449: Is misshapen by gravity , causing turns to be much tighter and slower at the top, and wider and faster at the bottom, and is sometimes referred to as a "tactical egg". The manoeuvres employed by the attacker can also be used by the defender to evade, or gain a tactical advantage over his opponent. Other components may also be employed to manoeuvre the aircraft, such as yaw , drag , lift , and thrust vectors. A key factor in all battles

832-543: Is not followed outside the United States: In addition, since three letter codes starting with Q are widely used in radio communication, cities whose name begins with "Q" also had to find alternate codes, as in the case of: IATA codes should not be confused with the FAA identifiers of U.S. airports. Most FAA identifiers agree with the corresponding IATA codes, but some do not, such as Saipan , whose FAA identifier

884-476: Is that the decisive factor does not lie in trick flying but solely in the personal ability and energy of the aviator. A flying man may be able to loop and do all the stunts imaginable and yet he may not succeed in shooting down a single enemy." Pilots soon learned to achieve a firing position (while avoiding the threat of enemy guns) by manoeuvring themselves behind an enemy aircraft; this is known as getting onto an aircraft's "six o'clock" or onto their "tail", plus

936-733: Is the tactic of moving, turning, and situating one's fighter aircraft in order to attain a position from which an attack can be made on another aircraft. Commonly associated with dogfighting , air combat manoeuvres rely on offensive and defensive basic fighter manoeuvring (BFM) to gain an advantage over an aerial opponent. Military aviation originated in World War I when aircraft were initially used to spot enemy troop concentrations, field gun positions, and movements. Early aerial combat consisted of aviators shooting at one another with hand-held weapons. The first recorded aircraft to be shot down by another aircraft, which occurred on October 5, 1914,

988-416: Is used for William P. Hobby Airport , the new Houston–Intercontinental became IAH. The code BKK was originally assigned to Bangkok–Don Mueang and was later transferred to Suvarnabhumi Airport , while the former adopted DMK. The code ISK was originally assigned to Gandhinagar Airport (Nashik's old airport) and later on transferred to Ozar Airport (Nashik's current airport). Shanghai–Hongqiao retained

1040-494: The AgustaWestland Apache . The facility has two operating runways. The 9,503-foot (2,897 m) east–west runway handles 96 percent of the traffic. It is equipped with a Fresnel lens optical landing system (FLOLS) at each approach end, as well as lit aircraft carrier flight deck landing areas at both ends, so pilots can simulate carrier landings. Apart from touch-and-go landings and take-offs, aircrews use

1092-571: The Canadian transcontinental railroads were built, each station was assigned its own two-letter Morse code : When the Canadian government established airports, it used the existing railway codes for them as well. If the airport had a weather station, authorities added a "Y" to the front of the code, meaning "Yes" to indicate it had a weather station or some other letter to indicate it did not. When international codes were created in cooperation with

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1144-407: The specific energy of the aircraft. Position of aircraft must quickly be assessed, including direction, angle off tail (the angle between flight paths), and closing speed. Also, the pilot must be aware of his wingman 's position and maintain good communication. A pilot in combat attempts to conserve his aircraft's energy through carefully timed and executed manoeuvres. By using such manoeuvres,

1196-559: The Display and Debriefing Subsystem, known as DDS, expanded the role of NAF El Centro to include air combat training by utilizing remote television, acoustical and laser scoring systems. The DDS is linked with the Tactical Air Crew Training System (TACTS) to provide a computerized record of the tactics employed by individual aircrews to employ and to evaluate the effectiveness of each maneuver. The facility

1248-485: The Doppler signature of one's own aircraft ("keeping the enemy at 3 or 9 o'clock"), or to exhaust the kinetic energy of an incoming missile (by changing the aircraft's course from side to side, the missile, not flying directly at target but trying to forestall it, will make sharper turns and will eventually have to fly a longer path). However, close-range fighting with infrared guided missiles and aircraft cannons still obeys

1300-653: The El Centro Naval Reservation. In 1941 the Civil Aeronautics Administration offered to replace the small airport in Imperial, California with a larger complex consisting of two 4,500ft runways. After the outbreak of World War II, the U.S. Navy leased the new airport and an adjacent 749 acres for additional construction. During this time the runways were extended and a third one was added. The expansion of MCAS El Centro

1352-722: The Parachute Experimental Division from Naval Air Station Lakehurst , New Jersey moved to El Centro. In 1951, the Joint Parachute Facility was established and consisted of the Naval Parachute Unit and the U.S. Air Force (USAF) 6511th Test Group (Parachute). The USAF remained part of El Centro's test organization for the next 27 years. In 2011, Prince Harry, Duke of Sussex trained at El Centro and at Gila Bend Air Force Auxiliary Field . While at both bases Harry trained on

1404-471: The U.S. For example, several airports in Alaska have scheduled commercial service, such as Stebbins and Nanwalek , which use FAA codes instead of ICAO codes. Thus, neither system completely includes all airports with scheduled service. Some airports are identified in colloquial speech by their IATA code. Examples include LAX and JFK . Air combat manoeuvring Air combat manoeuvring ( ACM )

1456-481: The United States, because "Y" was seldom used in the United States, Canada simply used the weather station codes for its airports, changing the "Y" to a "Z" if it conflicted with an airport code already in use. The result is that most major Canadian airport codes start with "Y" followed by two letters in the city's name (for example, YOW for O tta w a , YWG for W innipe g , YYC for C algar y , or YVR for V ancouve r ), whereas other Canadian airports append

1508-440: The airport itself instead of the city it serves, while another code is reserved which refers to the city itself which can be used to search for flights to any of its airports. For instance: Or using a code for the city in one of the major airports and then assigning another code to another airport: When different cities with the same name each have an airport, they need to be assigned different codes. Examples include: Sometimes,

1560-418: The airport's former name, such as Orlando International Airport 's MCO (for Mc C o y Air Force Base), or Chicago's O'Hare International Airport , which is coded ORD for its original name: Or char d Field. In rare cases, the code comes from the airport's unofficial name, such as Kahului Airport 's OGG (for local aviation pioneer Jimmy H ogg ). In large metropolitan areas, airport codes are often named after

1612-484: The attacking aircraft points ahead of the enemy. Lead pursuit is used to decrease the distance between aircraft, and during gun attacks when the cannons must be aimed, not at where the defender is, but where he will be when the bullets get there. "Pure pursuit" happens when the nose of the attacker points directly at the defender. Pure pursuit is when most missiles will be fired, and is the hardest position to maintain. These are known as pursuit curves. The turning battle of

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1664-502: The code SHA, while the newer Shanghai–Pudong adopted PVG. The opposite was true for Berlin : the airport Berlin–Tegel used the code TXL, while its smaller counterpart Berlin–Schönefeld used SXF; the Berlin Brandenburg Airport has the airport code BER, which is also part of its branding. The airports of Hamburg (HAM) and Hannover (HAJ) are less than 100 nautical miles (190 km) apart and therefore share

1716-934: The end. Examples include: A lot of minor airfields without scheduled passenger traffic have ICAO codes but not IATA codes, since the four letter codes allow more number of codes, and IATA codes are mainly used for passenger services such as tickets, and ICAO codes by pilots. In the US, such airfields use FAA codes instead of ICAO. There are airports with scheduled service for which there are ICAO codes but not IATA codes, such as Nkhotakota Airport/Tangole Airport in Malawi or Chōfu Airport in Tokyo, Japan. There are also several minor airports in Russia (e.g., Omsukchan Airport ) which lack IATA codes and instead use internal Russian codes for booking. Flights to these airports cannot be booked through

1768-557: The first three letters of the city in which it is located, for instance: The code may also be a combination of the letters in its name, such as: Sometimes the airport code reflects pronunciation, rather than spelling, namely: For many reasons, some airport codes do not fit the normal scheme described above. Some airports, for example, cross several municipalities or regions, and therefore, use codes derived from some of their letters, resulting in: Other airports—particularly those serving cities with multiple airports—have codes derived from

1820-478: The following format: Most large airports in Canada have codes that begin with the letter "Y", although not all "Y" codes are Canadian (for example, YUM for Yuma, Arizona , and YNT for Yantai , China), and not all Canadian airports start with the letter "Y" (for example, ZBF for Bathurst, New Brunswick ). Many Canadian airports have a code that starts with W, X or Z, but none of these are major airports. When

1872-597: The form of " YYZ ", a song by the rock band Rush , which utilizes the Morse code signal as a musical motif. Some airports have started using their IATA codes as brand names , such as Calgary International Airport (YYC) and Vancouver International Airport (YVR). Numerous New Zealand airports use codes that contain the letter Z, to distinguish them from similar airport names in other countries. Examples include HLZ for Hamilton , ZQN for Queenstown , and WSZ for Westport . Predominantly, airport codes are named after

1924-487: The international air booking systems or have international luggage transferred there, and thus, they are booked instead through the airline or a domestic booking system. Several heliports in Greenland have 3-letter codes used internally which might be IATA codes for airports in faraway countries. There are several airports with scheduled service that have not been assigned ICAO codes that do have IATA codes, especially in

1976-578: The many ranges at NAF El Centro to develop their skills. A remote-controlled target area allows naval aviators and naval flight officers to practice ordnance delivery. The desert range is used for air-to-ground bombing, rocket firing, strafing, dummy drops and mobile land target training. The target complex uses the Weapons Impact Scoring System that microwaves target images to a range master control building for immediate verification of weapons delivery accuracy. The addition of

2028-474: The most effective armament for a majority of World War I era fighter planes, but it was nearly impossible to fire them through the spinning propeller of one's own aircraft without destroying one's own plane. Roland Garros , working with Morane Saulnier Aéroplanes , was the first to solve this problem by attaching steel deflector wedges to the propeller. He achieved three kills but was shot down by ground fire and landed behind German lines. Anthony Fokker inspected

2080-500: The most important. In Southeast Asia, over 85 percent of all kills are attributed to the attacker spotting and shooting the defender without ever being seen. Structural limitations of the attacking and defending fighters must be taken into account, such as thrust-to-weight ratio , wing loading , and the "corner speed" (the maximum or minimum speed at which the aircraft can attain the best turning performance). Variable limitations must also be considered, such as turn radius , turn rate and

2132-612: The name of the airport itself, for instance: This is also true with some cities with a single airport (even if there is more than one airport in the metropolitan area of said city), such as BDL for Hartford, Connecticut 's B ra dl ey International Airport or Baltimore's BWI, for B altimore/ W ashington I nternational Airport ; however, the latter also serves Washington, D.C. , alongside Dulles International Airport (IAD, for I nternational A irport D ulles) and Ronald Reagan Washington National Airport (DCA, for D istrict of C olumbia A irport). The code also sometimes comes from

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2184-416: The one they are located in: Other airport codes are of obscure origin, and each has its own peculiarities: In Asia, codes that do not correspond with their city's names include Niigata 's KIJ , Nanchang 's KHN and Pyongyang 's FNJ . EuroAirport Basel Mulhouse Freiburg , which serves three countries, has three airport codes: BSL, MLH, EAP. Some cities have a name in their respective language which

2236-624: The plane's wreckage and learned to improve the design by connecting the firing mechanism of the gun to the timing of the engine, thus allowing the gun to fire through the propeller without making contact with the propeller. As technology rapidly advanced, new and young aviators began defining the realm of air-to-air combat, such as Max Immelmann , Oswald Boelcke , and Lanoe Hawker . One of the greatest of these "ace pilots" of World War I, Manfred von Richthofen (the Red Baron), wrote in his book The Red Fighter Pilot , "The great thing in air fighting

2288-506: The same first and middle letters, indicating that this rule might be followed only in Germany. Many cities retain historical names in their airport codes, even after having undergone an official name/spelling/transliteration change: Some airport codes are based on previous names associated with a present airport, often with a military heritage. These include: Some airports are named for an administrative division or nearby city, rather than

2340-464: The same general rules laid down in the skies over Europe in the early 20th century. The master rule is still the same: get on the opponent's rear without allowing them to do the same. Close-range combat tactics vary considerably according to the type of aircraft being used and the number of aircraft involved. There are five things a pilot must remain aware of when contemplating aerial engagement; of these, seeing and keeping sight of one's opponent are

2392-500: The station code of Malton, Mississauga , where it is located). YUL is used for Montréal–Trudeau (UL was the ID code for the beacon in the city of Kirkland , now the location of Montréal–Trudeau). While these codes make it difficult for the public to associate them with a particular Canadian city, some codes have become popular in usage despite their cryptic nature, particularly at the largest airports. Toronto's code has entered pop culture in

2444-515: The two-letter code of the radio beacons that were the closest to the actual airport, such as YQX in Gander or YXS in Prince George . Four of the ten provincial capital airports in Canada have ended up with codes beginning with YY, including: Canada's largest airport is YYZ for Toronto Pearson (as YTZ was already allocated to Billy Bishop Toronto City Airport , the airport was given

2496-529: The use of two letters allowed only a few hundred combinations; a three-letter system of airport codes was implemented. This system allowed for 17,576 permutations, assuming all letters can be used in conjunction with each other. Since the U.S. Navy reserved "N" codes, and to prevent confusion with Federal Communications Commission broadcast call signs , which begin with "W" or "K", the airports of certain U.S. cities whose name begins with one of these letters had to adopt "irregular" airport codes: This practice

2548-549: The winter training home of the Blue Angels aerobatics display team. Founded in 1946 as Naval Air Station El Centro, the facility had previously been the site of a World War II era Marine Corps Air Station . In 1979, the facility was given its current designation as a Naval Air Facility. In 1940, the United States Army established Camp Seeley ; its combat firing range site is within the current boundaries of

2600-497: Was a German Aviatik B.I . The pilot, Feldwebel Wilhelm Schlichting, was shot with a carbine wielded by observer Louis Quenault, who was riding in a French Voisin III piloted by Sergeant Joseph Frantz. The need to stop reconnaissance that was being conducted by enemy aircraft rapidly led to the development of fighter planes, a class of aircraft designed specifically to destroy other aircraft. Fixed, forward-firing guns were found to be

2652-595: Was decommissioned on May 1, 1946, the same day it was taken over by the Navy for use as a Naval Air Station . Fleet Air Gunnery Unit was opened. Through the years, Navy El Centro has had several names: Naval Air Facility, Naval Auxiliary Landing Field, Naval Air Station, and the National Parachute Test Range. For the first 35 years, the mission of NAF El Centro was devoted to aeronautical escape system testing, evaluation, and design. In November 1947,

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2704-417: Was done by Vinson & Pringle and Del E. Webb Construction Company out of Phoenix, Arizona . MCAS El Centro was commissioned on July 23, 1943. During the war, the air station was used as a training base for new squadrons and as a facility for squadrons returning from overseas to reorganize and begin preparing to deploy again. On March 15, 1945 a Marine Corps Aerial Gunnery School was opened. MCAS El Centro

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