ALS - Approach Light Systems - Aviation Term - Abbreviation / Acronym
Related Definitions from Aviation Glossary
GSA
GHA
Military Operations Area (MOA)
ATA - Air Transport Association
MRO ...
ALS. See approach lighting system.
Alternate airport. An airport designated in an IFR flight plan, providing a suitable destination if a landing at the intended airport becomes inadvisable.
ALS systems are usually used in conjunction with other lighting systems, such as Runway End lights and Touchdown Zone Lights, which mark the ends of the runway and the area in which the plane should touch the runway, respectively.
ALS
approach light system.
ALT
Altitude
ALTERNATE AIRPORT
means an airport at which an aircraft may land if a landing at the intended airport becomes inadvisable ...
Approach Light System (ALS)- An airport lighting facility which provides visual guidance to landing aircraft by radiating light beams in a directional pattern by which the pilot aligns the aircraft with the extended centerline of the runway on his ...
For really low visibilities an airport may have an ALS system. All ALS systems use a row of green lights to show the landing end of the runway. Combinations of differing intensity white and red lights extend up to 3000' from the threshold.
Approach Lighting System (ALS): An airport lighting facility that emits radiating light beams in a directional pattern by which the pilot aligns the aircraft with the runway on his final approach and landing.
Approach Light Systems (ALS) - A series of lights that assists the pilot when aligning aircraft with the extended runway centerline on final approach.
 See also: Power, FAA, ATC, Landing, Aircraft
  
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