precision approach aids
1instrument runway/instrument approach runway — A runway equipped with visual and electronic navigational aids for which a precision or a nonprecision approach with straight in landing minimums has been approved. There may be more than one instrument runway on an airfield. The various types of …
2Instrument approach — Terminal procedures for an ILS approach in the United States. (The disclaimers shown in red in the illustration do not appear on the original approach plate.) For aircraft operating under instrument flight rules (IFR), an instrument approach or… …
3Ground-controlled approach — In aviation a ground controlled approach (GCA), is a type of service provided by air traffic controllers whereby they guide aircraft to a safe landing in adverse weather conditions based on radar images. Most commonly a GCA uses information from… …
4Visual Approach Slope Indicator — The Visual Approach Slope Indicator (VASI) is a system of lights on the side of an airport runway that provides visual descent guidance information during the approach to a runway. These lights may be visible from up to eight kilometers (five… …
5Surveillance radar approach — A Surveillance Radar Approach (SRA or ASR) is an aviation term for a type of instrument approach provided with active assistance from Air Traffic Control during the final approach phase. It requires no special equipment in addition to a standard… …
6nonprecision approach — Radar controlled approach or an approach flown by reference to navigation aids in which glide slope information is not available. See also final approach; precision approach …
7nonprecision approach — A radar controlled approach or an approach flown by reference to navigational aids, in which electronic glide slope information is not available. Examples are VOR (very high frequency omnidirectional radio range), TACAN (tactical air navigation) …
8autoland approach — A precision instrument approach to touchdown and, in some cases, through the landing rollout performed by the aircraft autopilot. The autopilot receives position information and/or steering commands from onboard navigation equipment and is not… …
9Instrument landing system — The Instrument Landing System (ILS) is a ground based instrument approach system that provides precision guidance to an aircraft approaching a runway, using a combination of radio signals and, in many cases, high intensity lighting arrays to… …
10airport — airport1 /air pawrt , pohrt /, n. a tract of land or water with facilities for the landing, takeoff, shelter, supply, and repair of aircraft, esp. one used for receiving or discharging passengers and cargo at regularly scheduled times. [1915 20;… …
