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  2. List of aircraft type designators - Wikipedia

    en.wikipedia.org/wiki/List_of_aircraft_type...

    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).

  3. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    Civil flights in classes A, C and D airspace, or IFR flights in class E airspace. [6] US: External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.) [3] 3100, 3200, 3300, 3400, 3500, 3600, 3700 US: External ARTCC subsets.

  4. Airspace class - Wikipedia

    en.wikipedia.org/wiki/Airspace_class

    Class G airspace is defined wherever Class A and Class C airspaces are not defined. Class G airspace allows IFR and VFR operations. Class G airspace allows IFR and VFR operations. For altitudes less than 3,000 metres (9,800 ft) the speed must not exceed 450 kilometres per hour (280 mph; 240 kn).

  5. Wake turbulence category - Wikipedia

    en.wikipedia.org/wiki/Wake_turbulence_category

    RECAT Phase II was a continuation of the RECAT program that focused on a larger variety of aircraft (123 ICAO type designators that make up more than 99% of US air traffic movements based on 32 US airports), as opposed to the 61 aircraft comprising 85% of operations from 5 US and 3 European airports that were used in RECAT Phase I. [citation ...

  6. List of Class C airports in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_Class_C_airports...

    Class C is a class of airspace in the United States which follows International Civil Aviation Organization (ICAO) air space designation. Class C airspace areas are designed to improve aviation safety by reducing the risk of mid-air collisions in the terminal area and enhance the management of air traffic operations therein. [1]

  7. ACN-PCN method - Wikipedia

    en.wikipedia.org/wiki/ACN-PCN_method

    The Aircraft Classification Number (ACN) – Pavement Classification Number (PCN) method is a standardized international airport pavement rating system promulgated by the ICAO in 1981. The method has been the official ICAO pavement rating system for pavements intended for aircraft of apron (ramp) mass greater than 5700 kg from 1981 to 2020. [1]

  8. Aircraft approach category - Wikipedia

    en.wikipedia.org/wiki/Aircraft_approach_category

    The International Civil Aviation Organization (ICAO) classifies aircraft by their indicated airspeed at runway threshold (V at, [1]: II-5-1-3 also known as approach speed or V REF). The categories are as follows: [1]: II-5-1-3 Category A: less than 169 km/h (91 kt) indicated airspeed (IAS)

  9. Airway (aviation) - Wikipedia

    en.wikipedia.org/wiki/Airway_(aviation)

    All airspace above FL195 is class C controlled airspace, the equivalent to airways being called Upper Air Routes and having designators prefixed with the letter "U". If an upper air route follows the same track as an airway, its designator is the letter "U" prefix and the designator of the underlying airway.