Avionics are the electronic systems used on aircraft. Avionic systems include communications, navigation, the display and management of multiple systems, and the hundreds of systems that are fitted to aircraft to perform individual functions. These can be as simple as a searchlight for a police helicopter or as complicated as the tactical system for an airborne early warning platform.
Air traffic control (ATC) is a service provided by ground-based air traffic controller who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC worldwide is to prevent collisions, organize and expedite the flow of air traffic, and provide information and other support for pilots.
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).
Orange County is a county located in the Central Piedmont region of the Commonwealth of Virginia. At the 2020 census, the population was 36,254. Its county seat is Orange. Orange County includes Montpelier, the 2,700-acre (1,100 ha) estate of James Madison, the 4th President of the United States and often known as the "Father of the Constitution". The county celebrated its 275th anniversary in 2009.
Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor". Different sections of the band are used for radionavigational aids and air traffic control.
In air traffic control, an area control center (ACC), also known as a center or en-route center, is a facility responsible for controlling aircraft flying in the airspace of a given flight information region (FIR) at high altitudes between airport approaches and departures. In the US, such a center is referred to as an air route traffic control center (ARTCC).
The 1976 Zagreb mid-air collision took place on 10 September 1976, when British Airways Flight 476, a Hawker Siddeley Trident en route from London to Istanbul, collided mid-air with Inex-Adria Aviopromet Flight 550, a Douglas DC-9 en route from Split, SFR Yugoslavia, to Cologne, West Germany, near Zagreb in modern-day Croatia. The collision was the result of a procedural error on the part of air traffic controllers in Zagreb.
U.S. Route 33 is a part of the U.S. Highway System that runs from Elkhart, Indiana to Richmond, Virginia. In Virginia, the U.S. Highway runs 135.60 miles (218.23 km) from the West Virginia state line near Rawley Springs east to its eastern terminus at SR 33 in Richmond. US 33 is the primary east–west highway of Rockingham County, which lies in the Shenandoah Valley. The highway connects the independent city of Harrisonburg, the town of Elkton, and an entrance to Shenandoah National Park. East of the Blue Ridge Mountains, US 33 connects the Piedmont communities of Stanardsville, Gordonsville, and Louisa. The U.S. Highway is a major suburban and urban route in the Richmond metropolitan area. Within Richmond, US 33 runs concurrently with US 250. SR 33 continues from US 33's eastern terminus as a state-numbered extension of the U.S. Highway that connects Richmond with Virginia's Middle Peninsula.
On October 25, 1999, a chartered Learjet 35 business jet was scheduled to fly from Orlando, Florida, United States to Dallas, Texas, United States. Early in the flight, the aircraft, which was climbing to its assigned altitude on autopilot, lost cabin pressure, and all six on board were incapacitated by hypoxia, a lack of oxygen in the brain and body. The aircraft continued climbing past its assigned altitude, then failed to make the westward turn toward Dallas over North Florida and continued on its northwestern course, flying over the southern and midwestern United States for almost four hours and 1,500 miles (2,400 km). The plane ran out of fuel over South Dakota and crashed into a field near Aberdeen after an uncontrolled descent.
Albuquerque Air Route Traffic Control Center (ZAB) is located at 8000 Louisiana Boulevard, Albuquerque, New Mexico, United States. The Albuquerque ARTCC is one of 22 Air Route Traffic Control Centers in the United States.
Boston Air Route Traffic Control Center is one of 22 Air Route Traffic Control Centers in the United States, located in Nashua, New Hampshire.
The New York Terminal Radar Approach Control (TRACON) is located in Westbury, Long Island. New York TRACON, also known as N90, is a type of Federal Aviation Administration air traffic control facility known as a consolidated TRACON, meaning that a single location provides approach service for several large airports. The primary responsibility of the New York TRACON is the safe, orderly, and expeditious flow of arrival, departure, and en-route traffic. N90 is responsible for three major airports, all located within the same New York Class B airspace: John F. Kennedy International Airport, Newark Liberty International Airport, and LaGuardia Airport. Additionally, N90 is responsible for dozens of smaller but busy fields, including Long Island MacArthur Airport, Teterboro Airport, Tweed New Haven Regional Airport, and Westchester County Airport. N90 also controls the large number of VFR aircraft that fly through the New York Class B airspace every day.
The Philadelphia TRACON/ATCT is located at the Philadelphia International Airport and is a TRACON with Up-and-Down capabilities which means it includes both a TRACON and ATCT in the same facility. The facility is "sectorized" into two sectors for the controllers. "A-side" controllers, work the tower, and half the radar room. "B-side" controllers work the entire radar room (POM).
The Boston Consolidated TRACON (A90) is located in Merrimack, New Hampshire. A90 opened in 2004 after 8 years of development. The A90 function transferred to the new Boston Consolidated TRACON on February 22, 2004. The MHT function transferred over on March 7, 2004. Manchester TRACON used to be located at Manchester Airport below the old ATCT. Boston TRACON used to be located at the Logan International Airport Control Tower before being consolidated. The new facility is 63,000 square feet (5,900 m2). A Terminal Radar Approach Control, or TRACON, is responsible for descending airplanes from the ARTCC and lining them up for landing at their destination airport, as well as climbing departures before handing off to the ARTCC.
Montreal Area Control Centre is one of 7 Area Control Centres in Canada operated by Nav Canada. Montreal ACC is located in a building on the outskirts of Montréal–Pierre Elliott Trudeau International Airport.
American Airlines Flight 11 was a domestic passenger flight that was hijacked by five al-Qaeda terrorists on September 11, 2001, as part of the September 11 attacks. Lead hijacker Mohamed Atta deliberately crashed the plane into the North Tower of the World Trade Center in New York City, killing everyone on-board and ensuring the deaths of well over a thousand people who were at, above and immediately below the aircraft's impact zone, making it the deadliest of the four crashes to occur on the day in terms of both plane and ground fatalities. Carrying 92 passengers and crew, the aircraft involved, a Boeing 767-223ER, was flying American Airlines' daily scheduled morning transcontinental service from Logan International Airport in Boston to Los Angeles International Airport in Los Angeles.
District 13 is a United States Coast Guard district, based at the Henry M. Jackson Federal Building, in Seattle, Washington. It covers the Pacific Northwest and its Area of Responsibility encompasses four states; Washington, Oregon, Idaho, and Montana. District 13 is divided into three Sectors – Puget Sound, Columbia River and North Bend. The District has more than 3,000 active duty and reserve members, civilian employees, and auxiliaries and operates twenty-one cutters, 132 boats and eleven aircraft.
The 81 provinces of Turkey are divided into 973 districts. In the early Turkish Republic and in the Ottoman Empire, the corresponding unit was the kaza.
