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aircraft emergency frequency

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  • Aircraft emergency frequency — The aircraft emergency frequency (also known as guard) is a frequency used on the aircraft radio band reserved for emergency communications for aircraft in distress. The frequencies are 121.5 MHz for civilian, also known as International Air… …   Wikipedia

  • International distress frequency — An international distress frequency is a radio frequency that is designated for emergency communication by international agreement. Contents 1 History 2 Current frequencies 2.1 Digital Selective Calling frequencies 2.2 …   Wikipedia

  • Emergency Action Message — An Emergency Action Message (EAM) is a preformatted message that directs nuclear capable forces to execute specific Major Attack Options (MAOs) or Limited Attack Options (LAOs) in a nuclear war. Individual countries or specific regions may be… …   Wikipedia

  • Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common …   Wikipedia

  • Minimum Essential Emergency Communications Network — The Minimum Essential Emergency Communications Network (MEECN) is a network of systems providing uninterrupted communications throughout the pre , trans , and post nuclear warfare environment. At minimum, MEECN is designed to provide a one way… …   Wikipedia

  • Medium frequency — Frequency range 0.3 to 3 MHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 …   Wikipedia

  • List of accidents and incidents involving military aircraft, 1950-1974 — This is a list of notable accidents and incidents involving military aircraft grouped by the year in which the accident or incident occurred. For more exhaustive lists, see the [http://www.baaa acro.com/ Aircraft Crash Record Office] or the [http …   Wikipedia

  • Safety of emergency medical services flights — The safety of emergency medical services flights has become a topic of public interest in the United States, with the expansion of emergency medical services aviation operations, such as air ambulance and MEDEVAC, and the increasing frequency of… …   Wikipedia

  • National Emergency Alarm Repeater — The N.E.A.R. Warning Device. The National Emergency Alarm Repeater (NEAR) was a civilian emergency warning device in the United States. It was a 2 3 (5 7.5cm) square box designed to plug into a standard 110 volt power outlet to receive a special… …   Wikipedia

  • Single Frequency Approach — In aviation, a Single Frequency Approach (SFA) is a service for a military single piloted turbojet aircraft to use a single UHF frequency during their landing approach. Circumstances permitting, pilots will not be required to change their… …   Wikipedia

  • special emergency — A condition in which an aircraft has been hijacked or another hostile act that threatens the safety of the aircraft and/or its passengers has been committed by a person(s) on board. The pilot of an aircraft reporting a special emergency condition …   Aviation dictionary

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