localizer back beam

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• back beam — A reciprocal beam on the other side of a transmitter and on a reciprocal heading, as in an ILS (instrument landing system) localizer. Aircraft on a back beam may not have glide path information. A localizer with both front beam and back beam …   Aviation dictionary

• beam — i. A processed and directed pulse of energy. ii. An invisible path produced by radio signals. An aircraft can follow the beam when approaching or going away from a navigational fix. A radar detects an aircraft when it is illuminated by its beam.… …   Aviation dictionary

• Instrument 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… …   Wikipedia

• glide-path transmitter — An element in the ILS (instrument landing system) that defines a glide path beam and assists an aircraft to make an approach at a correct glide angle. A glide path transmitter is located 750 to 1250 ft from the runway threshold and 250 to 600 ft… …   Aviation dictionary

• Autoland — In aviation, autoland describes a system that fully automates the landing phase of an aircraft s flight, with the human crew merely supervising the process.DescriptionAutoland systems were designed to make landing possible in visibility too poor… …   Wikipedia

• navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… …   Universalium

• Microwave landing system — The NASA 737 research aircraft on the Wallops runway in 1987 with the Microwave Landing System equipment in the foreground. A microwave landing system (MLS) is an all weather, precision landing system originally intended to replace or supplement… …   Wikipedia