Siglas Inglês
Back to: "M"
MM
- Usado para
- middle marker
- Definição1
- A marker beacon that defines a point along the glide slope of an instrument landing system (ILS), normally located at or near the point of decision height (ILS Category I). The middle marker is keyed to transmit alternate dots and dashes keyed at the rate of 95 dot-dash combinations per minute, with a 1,300-hz tone which is received aurally and visually by compatible airborne equipment.
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. ICAO abbreviations and codes: procedures for air navigation services. 7. ed. Montreal, 2007. (Doc. 8400)
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Handbook on radio frequency spectrum requirements for civil aviation. 1st ed. Montreal, 2014. (Doc. 9718)
- Contexto
- The glide path projection angle is normally adjusted to 3 degrees above the horizontal plane so that it passes through the middle marker at about 60 m (200 ft) and the outer marker at about 426 m (1 400 ft) above the runway elevation.
- Subárea1
- Airport Infrastructure
- Related Term
- IM
- Português
- marcador médio