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marker beacon
- Definição1
- A low-powered, 75-MHz, fixed-frequency radio transmitter that directs its signal vertically upward in a small, fan-shaped pattern. Marker beacons are located along the flight path used when approaching an airport for landing, and are identified by their modulation frequency and keying code. When received by compatible airborne equipment, marker beacons indicate to othe pilot, both aurally and visually, when the aircraft is directly over the facility. When the aircraft is directly above the outer marker the pilot hears a series of 400-hertz dashes and the blue light illuminates in the series of dashes. Over the middle marker, the amber light illuminates in a series of alternate dots and dashes and the aural tone is a series of 1,300-hertz dots and dashes. The inner marker is identified by the white light illuminating in a series of dots and a series of 3,000-hertz dots is heard by the pilot.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 2nd ed. Renton: ASA, 1991.
- Fonte2
- ARAÚJO, João Richard Barcelos. Inglês técnico: técnicos em manutenção de aeronaves. [S.l]: [s.n.], [200-]. 100 p.
- Fonte3
- ANTAS, Luiz Mendes. Glossário de termos técnicos. São Paulo: Traço, 1979. 756 p. (Coleção Aeroespacial; t. 1.)
- Contexto
- The monitor system, when provided, should be checked to ensure that it will detect erroneous transmissions from the marker beacon.
- Subárea
- Air Navigation Aids
- Français
- radioborne
- Imagem
A middle marker beacon antenna at Ontario International Airport in California.
Fonte: http://en.wikipedia.org/wiki/File:Middle-marker-ont.jpg
