WebJul 23, 2024 · 121.5 MHz is generally reserved for civilian distress or emergency use, with 243MHz used for military operations (although you do hear military aircraft also on 121.5 MHz). If ATC (Air Traffic Control) are … The aircraft emergency frequency (also known as GUARD) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress. The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD) or VHF Guard, and 243.0 MHz—the second harmonic of VHF … See more The choice of 121.5 MHz was made by ICAO in conjunction with ARINC and the ITU. See more Both guard frequencies can be used by any aircraft in distress or experiencing an emergency and in addition it can be used by See more • Air-ground radiotelephone service • Airband • Distress signal • Mayday See more In the United States, the emergency frequency is monitored by most air traffic control towers, FSS services, national air traffic control … See more Older emergency locator transmitters transmit on 121.5 MHz in case of impact. Newer ELTs transmit on 406 MHz, with a low power beacon on 121.5 MHz for local homing. Satellites … See more
Common Aviation Frequencies: A Pilot’s Communication …
WebInternational Distress/Emergency Frequencies 2182 kHz: International Maritime Distress and Calling Frequency for Radio telephony. 4340 kHz: NATO Combined Submarine … WebKeep emergency aircraft on the frequency, or if possible, transfer the aircraft to an appropriate frequency. Determine survival gear carried. Divert other suitable aircraft; or retain other aircraft on the frequency as necessary to assist with visual observation of the aircraft and to provide advice on: cec fergus falls
Finding Air Traffic Frequencies - The RadioReference Wiki
WebOct 2, 2010 · Although 121.5 MHz and 243.0 MHz are emergency frequencies, it might be best to keep the aircraft on the initial contact frequency. Change frequencies only when … WebJan 5, 2024 · From The RadioReference Wiki. Aircraft use Airband as their primary means of voice communication. In North America, the spectrum from 118.000 to 136.975 MHz is used with 25 kHz spacing and AM. As of 2010 aeronautical enroute and flight test stations may use 8.33 kHz spaced channels in the 121.4-123.6, 128.825-132.0 and 136.5 … WebAug 5, 2008 · FSS frequencies are all in the 122 and 123 MHz series; for example, 122.25, 122.3, 122.35, 122.45, 122.55, 122.6, 122.65, and 123.65 MHz. Remember the universal … cec foothill