nondirectional radio beacon

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• radio beacon — Fixed ground stations emitting RF (radio frequency) signals, especially those containing identification signals such as NDBs (nondirectional beacons), which enable aircraft to fix their position relative to them. These facilities normally operate …   Aviation dictionary

• nondirectional beacon — A radio navigational aid that enables the pilot to obtain his bearing from a transmitting station. A transmitter operating in long or medium wave frequencies, or even in UHFs (ultrahigh frequencies), with the code of the station superimposed on… …   Aviation dictionary

• locator — i. An MF/LF (medium frequency/low frequency) nondirectional beacon used as an aid to final approach. ii. A portable radio beacon, operating on 121.5/243/ 406 MHz, carried on the person or in a parachute harness. It may also have a voice facility …   Aviation dictionary

• instrument approach chart — An aeronautical chart that depicts the aeronautical data required to execute an instrument approach procedure to an airport. These charts depict the procedures, including all related data, and the airport diagram. Each procedure is designated for …   Aviation dictionary

• minimum safe altitude — The altitude below which it is hazardous to fly because of the presence of high ground or other obstacles. MSAs are published for emergency use on instrument approach procedure (IAP) charts except RNAV (area navigation) IAPs. The MSA is defined… …   Aviation dictionary

• NONRADAR — A term that precedes other terms and generally means without use of radar, such as a non radar approach in which course guidance for the final approach is not provided by ground based radar, as in VOR (very high frequency omnidirectional radio… …   Aviation dictionary