- distress frequency
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a radio frequency band reserved for emergency signals from aircraft or ships in distress.
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Universalium. 2010.
distress frequency
Look at other dictionaries:
distress frequency — The frequency used to indicate that there is an emergency or distress situation. Internationally, there are two aeronautical frequencies for this purpose: 121.5 MHz and 243.0 MHz … Aviation dictionary
distress frequency — a radio frequency band reserved for emergency signals from aircraft or ships in distress … Useful english dictionary
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
Distress radiobeacon — PLB redirects here. For other uses, see PLB (disambiguation). Emergency position indicating radio beacons or EPIRBs Distress radio beacons, also known as emergency beacons, ELT or EPIRB, are tracking transmitters which aid in the detection and… … Wikipedia
Distress signal — Call for help redirects here. For the TV show, see Call for Help. A distress signal is an internationally recognized means for obtaining help. Distress signals take the form of or are commonly made by using radio signals, displaying a visually… … Wikipedia
Distress and Diversion — The Distress and Diversion (D D) Frequency is an international standard radio frequency for aviation distress. Set on 121.500 MHz it is the frequency for reporting a Pan Pan or a Mayday call. It is used in uncontrolled airspace, where ATC… … Wikipedia
Global Maritime Distress Safety System — The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and… … Wikipedia
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
Medium frequency — Frequency range 0.3 to 3 MHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 … Wikipedia
Mayday (distress signal) — Mayday is an emergency code word used internationally as a distress signal in voice procedure radio communications. It derives from the French venez m aider , meaning come help me . [ [http://www.etymonline.com/index.php?search=mayday… … Wikipedia
