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The world's navigable airspace is divided into three-dimensional segments, each of which is assigned to a specific class. Most nations adhere to the classification specified by the International Civil Aviation Organization (ICAO) and described below, though they might use only some of the classes defined below, and significantly alter the exact rules and requirements.
Multi-service classifications. Multi-service classification codes according to the Joint Electronics Type Designation System. Specific radar systems. AN/BPS-11 Surface search radar, for submarines. AN/BPS-15 Surface search radar, for submarines. [52] AN/BPS-16 Surface search radar, for submarines. AN/SPG-34 Tracking radar for Mark 63 Gun Fire ...
Flag of the ICAO. An aircraft type designator is a two-, three- or four-character alphanumeric code designating every aircraft type (and some sub-types) that may appear in flight planning. These codes are defined by both the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA).
The radar measures the distance to the reflector by measuring the time of the round trip from emission of a pulse to reception, dividing this by two, and then multiplying by the speed of light. To be accepted, the received pulse has to lie within a period of time called the range gate .
The United States airspace system's classification scheme is intended to maximize pilot flexibility within acceptable levels of risk appropriate to the type of operation and traffic density within that class of airspace – in particular to provide separation and active control in areas of dense or high-speed flight operations.
A. AI Mark IV radar; AI Mark VIII radar; AI.20 radar; AI.24 Foxhunter; Air-to-surface-vessel radar; Airborne early warning and control; Aircraft interception radar
Class C airspace only exists over airports which have an operational control tower, are serviced by a radar approach control, and have a certain number of instrument flight operations. Class C is also individually designed for airports but usually covers a surface area of about 5 nautical miles around the airport up to 1,200 ft AGL.
A Royal Air Force Boeing E-3 Sentry over North Yorkshire. An airborne early warning and control (AEW&C) system is an airborne radar early warning system designed to detect aircraft, ships, vehicles, missiles and other incoming projectiles at long ranges, as well as performing command and control of the battlespace in aerial engagements by informing and directing friendly fighter and attack ...