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96-606: Naval Air Facility Atsugi ( 厚木海軍飛行場 , Atsugi Kaigun-hikōjō ) ( IATA : NJA , ICAO : RJTA ) is a joint Japan-US naval air base located in the cities of Yamato and Ayase in Kanagawa , Japan . It is the largest United States Navy (USN) air base in the Pacific Ocean , and once housed the squadrons of Carrier Air Wing Five (CVW-5), which deploys with the American aircraft carrier USS  Ronald Reagan . During 2017 and 2018

192-507: A MH-60S Knighthawk of CVW-5 crashed in Miura city due to a tail jam. The aircraft was written off, and two of the four occupants were injured. On 15 February 2014 three US Navy P-3 Orions were crushed "beyond repair" when their hangar was destroyed due to a massive snow storm. In December 2016 police arrested a Kawasaki man for pointing a laser pointer at JMSDF aircraft in July of the same year. It

288-570: A glider-club landing strip . This same plane was piloted by Gary Powers , which provoked an international incident when it was downed over the Soviet Union . Lee Harvey Oswald was based at Atsugi during his time in the United States Marines . He was a radar operator assigned to Marine Air Control Squadron 1 . He was stationed there from September 1957 to November 1958. In 1964 a United States Marine Corps F8U-2 Crusader based at

384-443: A runway is a "defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft ". Runways may be a human-made surface (often asphalt , concrete , or a mixture of both) or a natural surface ( grass , dirt , gravel , ice , sand or salt ). Runways, taxiways and ramps , are sometimes referred to as "tarmac", though very few runways are built using tarmac . Takeoff and landing areas defined on

480-411: A windsock beside a landing strip. Types of runway safety incidents include: The choice of material used to construct the runway depends on the use and the local ground conditions. For a major airport, where the ground conditions permit, the most satisfactory type of pavement for long-term minimum maintenance is concrete . Although certain airports have used reinforcement in concrete pavements, this

576-480: A 7 will indicate 7,000 ft (2,134 m) remaining. The runway threshold is marked by a line of green lights. [REDACTED] There are three types of runways: Waterways may be unmarked or marked with buoys that follow maritime notation instead. For runways and taxiways that are permanently closed, the lighting circuits are disconnected. The runway threshold, runway designation, and touchdown markings are obliterated and yellow "Xs" are placed at each end of

672-460: A few died from cancer shortly after moving back to the United States. For a time, the base required servicemembers to undergo medical screenings before being stationed at the base in order to ensure that their bodies could handle the poor air quality. In spite of this, servicemembers still developed health problems, such as acute cases of asthma . The US government's Department of Justice sued

768-479: A landing site for the Space Shuttle . Takeoff and landing distances available are given using one of the following terms: There are standards for runway markings. There are runway markings and signs on most large runways. Larger runways have a distance remaining sign (black box with white numbers). This sign uses a single number to indicate the remaining distance of the runway in thousands of feet. For example,

864-428: A mechanical failure of the aileron system while maneuvering to land on runway 01, and crashed short of the runway. All six aboard were killed. In 1977, a McDonnell Douglas F-4 Phantom II based at the facility suffered a mechanical failure, and crashed into a residential neighborhood in nearby Yokohama . The crew ejected and survived, but two young boys, aged 1 and 3, were killed, and 7 others injured. Elements of

960-550: 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

1056-542: A periodic basis. Fields with very low traffic of light planes may use a sod surface. Some runways make use of salt flats. For pavement designs, borings are taken to determine the subgrade condition, and based on the relative bearing capacity of the subgrade, the specifications are established. For heavy-duty commercial aircraft, the pavement thickness, no matter what the top surface, varies from 10 to 48 in (25 to 122 cm), including subgrade. Airport pavements have been designed by two methods. The first, Westergaard ,

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1152-415: A third parallel runway was opened at Phoenix Sky Harbor International Airport in 2000 to the south of existing 8R/26L—rather than confusingly becoming the "new" 8R/26L it was instead designated 7R/25L, with the former 8R/26L becoming 7L/25R and 8L/26R becoming 8/26. Suffixes may also be used to denote special use runways. Airports that have seaplane waterways may choose to denote the waterway on charts with

1248-609: A week to fly supplies to the USS ; Ronald Reagan . Atsugi is named after the nearby city of Atsugi despite not actually being in Atsugi (it is separated from Atsugi by two other cities). The name was chosen because Atsugi was the only large town in the area as of 1950, and the three farming villages surrounding the base at that time—Yamato Village, Ayase Village, and Shibuya Village—shared names with better-known areas elsewhere in Japan. Yamato

1344-499: 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

1440-646: Is an alternative name for the Nara region, Ayase is generally associated with the area around Ayase Station in northeast Tokyo, and Shibuya is generally associated with the ward of Shibuya in central Tokyo. NAF Atsugi and the people stationed there gained notoriety in the 1990s (stemming from near-daily reports in the Pacific Stars and Stripes newspaper) due to their proximity to the Jinkanpo Atsugi Incinerator , which blew toxic, and cancerous emissions over

1536-445: Is an extrapolation of the original test results, which are not applicable to modern aircraft pavements or to modern aircraft landing gear . Some designs were made by a mixture of these two design theories. A more recent method is an analytical system based on the introduction of vehicle response as an important design parameter. Essentially it takes into account all factors, including the traffic conditions, service life, materials used in

1632-544: 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

1728-463: Is based on the assumption that the pavement is an elastic plate supported on a heavy fluid base with a uniform reaction coefficient known as the K value . Experience has shown that the K values on which the formula was developed are not applicable for newer aircraft with very large footprint pressures. The second method is called the California bearing ratio and was developed in the late 1940s. It

1824-399: Is considered to have the longest takeoff distance of the more common aircraft types and has set the standard for runway lengths of larger international airports. At sea level , 3,200 m (10,500 ft) can be considered an adequate length to land virtually any aircraft. For example, at O'Hare International Airport , when landing simultaneously on 4L/22R and 10/28 or parallel 9R/27L, it

1920-518: 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

2016-418: Is generally found to be unnecessary, with the exception of expansion joints across the runway where a dowel assembly, which permits relative movement of the concrete slabs, is placed in the concrete. Where it can be anticipated that major settlements of the runway will occur over the years because of unstable ground conditions, it is preferable to install asphalt concrete surface, as it is easier to patch on

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2112-650: 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 ,

2208-513: 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

2304-408: Is included for all ICAO and some U.S. military airports (such as Edwards Air Force Base ). However, most U.S.  civil aviation airports drop the leading zero as required by FAA regulation. This also includes some military airfields such as Cairns Army Airfield . This American anomaly may lead to inconsistencies in conversations between American pilots and controllers in other countries. It

2400-454: Is most nearly aligned with the wind. Airports with one runway are often constructed to be aligned with the prevailing wind . Compiling a wind rose is one of the preliminary steps taken in constructing airport runways. Wind direction is given as the direction the wind is coming from : a plane taking off from runway 09 faces east, into an "east wind" blowing from 090°. Originally in the 1920s and 1930s, airports and air bases (particularly in

2496-532: 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

2592-567: Is routine for arrivals from East Asia , which would normally be vectored for 4L/22R (2,300 m (7,546 ft)) or 9R/27L (2,400 m (7,874 ft)) to request 28R (4,000 m (13,123 ft)). It is always accommodated, although occasionally with a delay. Another example is that the Luleå Airport in Sweden was extended to 3,500 m (11,483 ft) to allow any fully loaded freight aircraft to take off. These distances are also influenced by

2688-451: Is slow, runway designation changes are uncommon, and not welcomed, as they require an accompanying change in aeronautical charts and descriptive documents. When a runway designation does change, especially at major airports, it is often done at night, because taxiway signs need to be changed and the numbers at each end of the runway need to be repainted to the new runway designators. In July 2009 for example, London Stansted Airport in

2784-416: 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

2880-459: Is usually adequate for aircraft weights below approximately 100,000 kg (220,000 lb). Larger aircraft including widebodies will usually require at least 2,400 m (7,900 ft) at sea level. International widebody flights, which carry substantial amounts of fuel and are therefore heavier, may also have landing requirements of 3,200 m (10,500 ft) or more and takeoff requirements of 4,000 m (13,000 ft). The Boeing 747

2976-557: Is very common in a country such as Canada for a controller to clear an incoming American aircraft to, for example, runway 04, and the pilot read back the clearance as runway 4. In flight simulation programs those of American origin might apply U.S. usage to airports around the world. For example, runway 05 at Halifax will appear on the program as the single digit 5 rather than 05. Military airbases may include smaller paved runways known as "assault strips" for practice and training next to larger primary runways. These strips eschew

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3072-561: 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

3168-627: The Japan-US security treaty is beyond the government's jurisdiction. In this it was following a Supreme Court ruling on the 1976 case, where the court ruled that the Japanese government has no power to regulate the activities of US forces in the country. The case was appealed to the Supreme Court and in December 2016 Japan's Supreme Court overturned the ban on SDF night flights. It upheld the damages awarded by

3264-580: The Korean War . The Seabees (Navy construction battalions) came to the base in 1950 and prepared it for re-opening that December as Naval Air Station Atsugi . NAF Atsugi was a major naval air base during both the Korean War and Vietnam War , serving fighters, bombers, and transport aircraft. One of the aircraft based at Atsugi at least since 1957 was the U-2 spy plane. The plane made local Japanese headlines when it ran low on fuel and made an emergency landing at

3360-490: The Naval Security Group , and rotational squadrons of EP-3 Aries that are now stationed at Misawa Air Base were formerly stationed at Atsugi until the 1990s. On 9 February 1999 a fire broke out at a terminal, no injuries were reported. On 3 April 2003 a faction of the leftist group Kakurōkyō attacked the facility with improvised mortar fire. Around the same time the same group also attacked Yokota Air Base , and

3456-480: The Third Country National list to see if they require special approval to enter the base. There was an "Atsugi WINGS" air show held until the year 2000, featuring the "diamond of diamonds" display by formations of US Navy aircraft. This was last held in the year 2000. There were many complaints about aircraft noise and low-flying planes, and from 2001 onwards full-fledged flying displays were not held during

3552-569: The USAAF 3d Bombardment Group moved in about 8 September, being replaced by the USAAF 49th Fighter Group on 15 September which handled the initial cleanup of the heavily damaged airfield along with the 1539th Army Air Forces Base Unit to provide station facilities. Minimal flight operations were restored by October which allowed the P-61 Black Widow -equipped 418th Night Fighter Squadron to operate from

3648-552: The National Defence Agency. In 2004 a McDonnell Douglas MD 900 Explorer operated by Aero Asahi made a crash-landing at Naval Air Facility Atsugi. There were no fatalities. On 14 November 2009 a fire in Hangar 183 at the base injured three Japanese employees of Obayashi Corporation . The fire was reported at 11:55 a.m., and was extinguished by 12:45 p.m. The hangar was moderately damaged. In December 2009, Atsugi

3744-660: The Navy's most formidable fighter squadrons during World War II . Aircraft based at Atsugi shot down more than 300 American bombers during the firebombings of 1945. After Japan's surrender, many of Atsugi's pilots refused to follow Emperor Hirohito 's order to lay down their arms, and took to the skies to drop leaflets on Tokyo and Yokohama urging locals to resist the Americans. Eventually, these pilots gave up, and left Atsugi. General Douglas MacArthur arrived at Atsugi on 30 August to accept Japan's surrender. Shortly afterwards, elements of

3840-538: The Tokyo High Court. The plaintiffs planned to file a fifth lawsuit as soon as February 2017. Organizing by residents continued and in July 2017 it was reported that there were plans for around 6,000 local people to launch the fifth lawsuit against the government regarding noise from the base. Shuji Onami, leader of the plaintiffs, stated "Our lives are disrupted and are even put at risk whenever we are hit with booming noise (from aircraft) overhead. We will never accept

3936-577: 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 . Landing strip According to the International Civil Aviation Organization (ICAO),

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4032-646: The United Kingdom changed its runway designations from 05/23 to 04/22 during the night. Runway dimensions vary from as small as 245 m (804 ft) long and 8 m (26 ft) wide in smaller general aviation airports, to 5,500 m (18,045 ft) long and 80 m (262 ft) wide at large international airports built to accommodate the largest jets , to the huge 11,917 m × 274 m (39,098 ft × 899 ft) lake bed runway 17/35 at Edwards Air Force Base in California – developed as

4128-461: The United Kingdom) were built in a triangle-like pattern of three runways at 60° angles to each other. The reason was that aviation was only starting, and although it was known that wind affected the runway distance required, not much was known about wind behaviour. As a result, three runways in a triangle-like pattern were built, and the runway with the heaviest traffic would eventually expand into

4224-481: 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

4320-551: The aircraft tyres. To maintain the macrotexturing built into the runway by the grooves, maintenance crews engage in airfield rubber removal or hydrocleaning in order to meet required FAA , or other aviation authority friction levels. Subsurface underdrains help provide extended life and excellent and reliable pavement performance. At the Hartsfield Atlanta, GA airport the underdrains usually consist of trenches 18 in (46 cm) wide and 48 in (120 cm) deep from

4416-431: The airfield crashed in nearby Machida, Tokyo . The pilot ejected, and was not seriously injured, but the crash killed four, and injured 32 people on the ground, and destroyed seven houses. In 1969 an EC-121 aircraft of VQ-1 that took off from Atsugi on a reconnaissance mission near North Korea was shot down by a North Korean MiG-21 . A series of options for response were presented to Nixon but ultimately no action

4512-520: The airfield to provide air defense over the area, along with the P-38 Lightnings of the 49th FG. The 49th moved to Chitose Airfield on Hokkaido in mid February 1946, the 418th NFS to Okinawa in June, and on 31 December 1946 the 1539th AAFBU moved to Haneda Airfield . During the occupation, the base housed the overflow from nearby Camp Zama ; it was not refurbished to handle military air traffic until

4608-440: 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,

4704-418: 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

4800-447: The airport's main runway, while the other two runways would be either abandoned or converted into taxiways. Runways are named by a number between 01 and 36, which is generally the magnetic azimuth of the runway's heading in deca degrees . This heading differs from true north by the local magnetic declination . A runway numbered 09 points east (90°), runway 18 is south (180°), runway 27 points west (270°) and runway 36 points to

4896-537: The ambiguity that would result with more than three parallel runways. For example, in Los Angeles, this system results in runways 6L, 6R, 7L, and 7R, even though all four runways are actually parallel at approximately 69°. At Dallas/Fort Worth International Airport , there are five parallel runways, named 17L, 17C, 17R, 18L, and 18R, all oriented at a heading of 175.4°. Occasionally, an airport with only three parallel runways may use different runway identifiers, such as when

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4992-573: The base for training this also caused local protests. There were complaints in 2017 after children were allowed to touch machine guns on US helicopters during the May 2017 open day at Atsugi. City authorities from Ayase and Yamato cities complained, after which the machine guns were quickly removed. During Spring Atsugi holds an open day. Non-Japanese visitors may be turned away from the gates for security reasons. Prospective attendees who are neither Japanese or American should bring identification and also consult

5088-561: The base. In 2005 Yamato city officials protested over noisy night landings from F/A-18 Hornet training. In 2007 the Japanese Communist Party (JCP) protested about F-16 and F/A-18 exercises at the base, and asked that they be stopped. In 2013 the JCP also protested after a USN MH-60S Seahawk helicopter from Atsugi crashed in Miura city, and asked that Bell Boeing V-22 Ospreys not be deployed to Atsugi. When Ospreys were sent to

5184-491: 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

5280-411: The construction, and, especially important, the dynamic response of the vehicles using the landing area. Because airport pavement construction is so expensive, manufacturers aim to minimize aircraft stresses on the pavement. Manufacturers of the larger planes design landing gear so that the weight of the plane is supported on larger and more numerous tires. Attention is also paid to the characteristics of

5376-919: 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

5472-557: 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

5568-628: The fixed-wing aircraft of CVW-5 relocated to Marine Corps Air Station Iwakuni in western Japan. CVW-5 shares the base with the Headquarters Fleet Air Force , and Fleet Air Wing 4 of the Japan Maritime Self-Defense Force (JMSDF). NAF Atsugi is also home to Helicopter Maritime Strike Squadron 51 ( HSM-51 ), which provides detachments of MH-60R helicopters to forward deployed U.S. Navy guided missile cruisers , guided missile destroyers , and frigates homeported at

5664-474: 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

5760-575: The following: According to Transport Canada 's regulations, the runway-edge lighting must be visible for at least 2 mi (3 km). Additionally, a new system of advisory lighting, runway status lights , is currently being tested in the United States. The edge lights must be arranged such that: Typically the lights are controlled by a control tower , a flight service station or another designated authority. Some airports/airfields (particularly uncontrolled ones ) are equipped with pilot-controlled lighting , so that pilots can temporarily turn on

5856-593: 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

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5952-536: The government should pay 2.75 billion yen in compensation. Both the plaintiffs, and the government appealed the case and in July 2006 the Tokyo High Court ordered the government to pay 4.04 billion yen to 4,865 people living near the base. The fourth lawsuit over noise was filed in 2007 in the Yokohama District Court. In May 2014 the court ruled that the SDF should not operate its aircraft between 10pm to 6am and that

6048-532: The government should pay ¥7 billion yen in damages. It was the first lawsuit to request the grounding of US military aircraft. This request was rejected by the court. The ruling was appealed, and in its July 2015 ruling the Tokyo High Court gave ¥9.4 billion to around 6,900 residents from eight cities, increasing the payout from the ¥7 billion yen ordered by the Yokohama district court. The Tokyo court also rejected calls to forbid night flights by US aircraft, arguing that

6144-447: The high-rise buildings in its immediate vicinity. The incinerator's owners, arrested and jailed for charges of tax evasion , neglected the maintenance of the facility. The pollution had become so much of a health problem for residents that if they showed signs of adverse health effects, the base allowed them to leave early (usually servicemembers are stationed at the base for a tour of three years). Many servicemembers reported sickness, and

6240-470: The incinerator operators. In May 2001, just before the court was to hand down its decision, the Japanese government purchased the plant for nearly 40 million dollars and shut it down. Dismantling was completed by the end of that year. Since 1976 there have been a number of lawsuits with local residents sued the Japanese government over noise from the base, and in October 2002 the Yokohama district court ruled that

6336-482: 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

6432-496: The lack of designated landing direction. If there is more than one runway pointing in the same direction (parallel runways), each runway is identified by appending left (L), center (C) and right (R) to the end of the runway number to identify its position (when facing its direction)—for example, runways one-five-left (15L), one-five-center (15C), and one-five-right (15R). Runway zero-three-left (03L) becomes runway two-one-right (21R) when used in

6528-432: The landing gear itself, so that adverse effects on the pavement are minimized. Sometimes it is possible to reinforce a pavement for higher loading by applying an overlay of asphaltic concrete or portland cement concrete that is bonded to the original slab. Post-tensioning concrete has been developed for the runway surface. This permits the use of thinner pavements and should result in longer concrete pavement life. Because of

6624-409: The lights when the relevant authority is not available. This avoids the need for automatic systems or staff to turn the lights on at night or in other low visibility situations. This also avoids the cost of having the lighting system on for extended periods. Smaller airports may not have lighted runways or runway markings. Particularly at private airfields for light planes, there may be nothing more than

6720-581: The move was delayed by three years, to 2017. The plan was for the move to take place in stages and be completed in May 2018. The move did not include the wing's approximately 20 helicopters. The move began in August 2017 with the five E-2D Hawkeye aircraft of VAW-125 relocating to Iwakuni after the USS Ronald Reagan ' s summer 2017 patrol. Around 3800 personnel were expected to move to Iwakuni. IATA airport code The assignment of these codes

6816-612: 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

6912-401: The nearby Yokosuka Naval Base . Service members stationed at Atsugi also work in conjunction with the former Kamiseya Naval Radio Receiving Facility . Despite its name, the base is 4 nautical miles (7.4 km; 4.6 mi) east northeast from the city of Atsugi , and is not adjacent to the city. The Imperial Japanese Navy constructed the base in 1938 to house the 302nd Kokutai, one of

7008-458: The nearest 10°, this affects some runways sooner than others. For example, if the magnetic heading of a runway is 233°, it is designated Runway 23. If the magnetic heading changes downwards by 5 degrees to 228°, the runway remains Runway 23. If on the other hand the original magnetic heading was 226° (Runway 23), and the heading decreased by only 2 degrees to 224°, the runway becomes Runway 22. Because magnetic drift itself

7104-521: The need for "distinctly marked and carefully prepared landing places, [but] the preparing of the surface of reasonably flat ground [is] an expensive undertaking [and] there would also be a continuous expense for the upkeep." For fixed-wing aircraft , it is advantageous to perform takeoffs and landings into the wind to reduce takeoff or landing roll and reduce the ground speed needed to attain flying speed . Larger airports usually have several runways in different directions, so that one can be selected that

7200-581: The north (360° rather than 0°). When taking off from or landing on runway 09, a plane is heading around 90° (east). A runway can normally be used in both directions, and is named for each direction separately: e.g., "runway 15" in one direction is "runway 33" when used in the other. The two numbers differ by 18 (= 180°). For clarity in radio communications, each digit in the runway name is pronounced individually: runway one-five, runway three-three, etc. (instead of "fifteen" or "thirty-three"). A leading zero, for example in "runway zero-six" or "runway zero-one-left",

7296-416: 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

7392-436: The open day. Currently there is a ground display of US Navy and JMSDF aircraft, as well as take-offs and landings by various aircraft, including touch-and-go landing practice. Atsugi hosts part of Carrier Air Wing Five , part of aircraft carrier USS Ronald Reagan's air component. The wing includes about 70 aircraft and 2,000 military personnel who are stationed at Atsugi when the carrier is in port at Yokosuka. On 9 May 2008

7488-589: The opposite direction (derived from adding 18 to the original number for the 180° difference when approaching from the opposite direction). In some countries, regulations mandate that where parallel runways are too close to each other, only one may be used at a time under certain conditions (usually adverse weather ). At large airports with four or more parallel runways (for example, at Chicago O'Hare , Los Angeles , Detroit Metropolitan Wayne County , Hartsfield-Jackson Atlanta , Denver , Dallas–Fort Worth and Orlando ), some runway identifiers are shifted by 1 to avoid

7584-420: The reality of the Atsugi base-related flights." It was also reported that 2,000 to 3,000 additional residents may also join the action at a later time. As of August 2017 6,063 nearby residents had joined the lawsuit. In addition to the lawsuits over noise there have been a number of protests regarding the base. In July 1988 20,000 people made a human chain around the base to protest about noisy night landings at

7680-478: The runway grade (slope) such that, for example, each 1 percent of runway down slope increases the landing distance by 10 percent. An aircraft taking off at a higher altitude must do so at reduced weight due to decreased density of air at higher altitudes, which reduces engine power and wing lift. An aircraft must also take off at a reduced weight in hotter or more humid conditions (see density altitude ). Most commercial aircraft carry manufacturer's tables showing

7776-406: The runway and at 1,000 ft (305 m) intervals. A line of lights on an airfield or elsewhere to guide aircraft in taking off or coming in to land or an illuminated runway is sometimes also known as a flare path . Runway lighting is used at airports during periods of darkness and low visibility. Seen from the air, runway lights form an outline of the runway. A runway may have some or all of

7872-501: 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

7968-623: The standard numerical naming convention and instead employ the runway's full three digit heading; examples include Dobbins Air Reserve Base 's Runway 110/290 and Duke Field 's Runway 180/360. Runways with non-hard surfaces, such as small turf airfields and waterways for seaplanes , may use the standard numerical scheme or may use traditional compass point naming, examples include Ketchikan Harbor Seaplane Base 's Waterway E/W. Airports with unpredictable or chaotic water currents, such as Santa Catalina Island 's Pebbly Beach Seaplane Base, may designate their landing area as Waterway ALL/WAY to denote

8064-497: 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

8160-414: The suffix T; this is advantageous for certain airfields in the far north such as Thule Air Base (08T/26T). Runway designations may change over time because Earth's magnetic lines slowly drift on the surface and the magnetic direction changes. Depending on the airport location and how much drift occurs, it may be necessary to change the runway designation. As runways are designated with headings rounded to

8256-567: The suffix W; such as Daniel K. Inouye International Airport in Honolulu and Lake Hood Seaplane Base in Anchorage . Small airports that host various forms of air traffic may employ additional suffixes to denote special runway types based on the type of aircraft expected to use them, including STOL aircraft (S), gliders (G), rotorcraft (H), and ultralights (U). Runways that are numbered relative to true north rather than magnetic north will use

8352-633: The surface of water for seaplanes are generally referred to as waterways . Runway lengths are now commonly given in meters worldwide , except in North America where feet are commonly used. In 1916, in a World War I war effort context, the first concrete-paved runway was built in Clermont-Ferrand in France , allowing local company Michelin to manufacture Bréguet Aviation military aircraft. In January 1919, aviation pioneer Orville Wright underlined

8448-441: The susceptibility of thinner pavements to frost heave , this process is generally applicable only where there is no appreciable frost action . Runway pavement surface is prepared and maintained to maximize friction for wheel braking. To minimize hydroplaning following heavy rain, the pavement surface is usually grooved so that the surface water film flows into the grooves and the peaks between grooves will still be in contact with

8544-547: The top of the pavement. A perforated plastic tube (5.9 in (15 cm) in diameter) is placed at the bottom of the ditch. The ditches are filled with gravel size crushed stone. Excessive moisture under a concrete pavement can cause pumping, cracking, and joint failure. In aviation charts, the surface type is usually abbreviated to a three-letter code. The most common hard surface types are asphalt and concrete. The most common soft surface types are grass and gravel. A runway of at least 1,800 m (5,900 ft) in length

8640-504: 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

8736-529: 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

8832-877: The wing commander, Captain Michael P. McNellis, was relieved of command by Rear Admiral Richard B. Wren, commander of Commander Task Force 70, after the admiral said he lost confidence in McNellis' ability to command. McNellis was replaced by Captain Michael S. White. In 2012 the squadrons of CVW 5 completed their transition to variants of the Super Hornet/Growler, making it the first air wing without legacy Hornets . Since at least 2005 there have been plans to relocate Carrier Air Wing Five 's approximately 60 fixed wing aircraft from Atsugi to Marine Corps Air Station Iwakuni in Yamaguchi prefecture . Yamaguchi governor Sekinari Nii said there

8928-406: Was "no way" Yamaguchi prefecture would accept this. In 2006 Iwakuni voters rejected the plan in a plebiscite and Iwakuni mayor Katsusuke Ihara urged Tokyo to drop the plan. In 2007 the Japanese government passed legislation to prepare for the relocation of US Forces in Japan including subsidies for local affected areas. The move was planned to have been done in 2014, but after construction delays

9024-449: Was again attacked, this time by Kakurōkyō members via improvised mortar barrages. Personnel and aircraft from the base assisted with Operation Tomodachi following and during the March 2011 Tōhoku earthquake and tsunami and Fukushima I nuclear accidents . During the crisis, around 2,000 American family members voluntarily departed the base for locations outside Japan. On 16 December 2013

9120-419: Was reported that in 2016 there had been about 30 reports of laser pointers being directed at Japanese, and US aircraft. A Grumman C-2A Greyhound assigned to VRC-30 aboard the USS Ronald Reagan was lost in an accident at sea on 22 November 2017. Three of the personnel on board were lost. After this a detachment of 4-6 US Marine Corps Bell Boeing V-22 Osprey tilt-rotor aircraft were deployed to Atsugi for

9216-538: Was taken. The reconnaissance flights resumed a week later. In 1972, the U.S. and Japanese governments agreed to share ownership of the base, after which the Japan Maritime Self Defence Force began operating from there. In 1973 Yokosuka became the home port of the carrier USS  Midway . As a consequence CVW-5, the carrier's air wing was based at Atsugi. On 2 November 1976, a US Navy Grumman C-1 Trader , piloted by Lt. Laury K. Backman, suffered

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