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Topic: Aircraft emergency frequency

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	Emergency reporting for marine and airborne vessels - Patent 5355140
		An emergency signal may be transmitted by voluntary action by the worker, by sensing the worker's physical condition, or by sensing the condition of an environmental protection system (such as a self-contained breathing apparatus) carded by the worker.
		In response to receipt of an emergency event signal by the controller/modem module 91 from the vessel data module 93, the module 91 first issues a wake-up command on a signal line 95 that is received by a data interface module 97 for transmission apparatus 101.
		A decoded emergency event signal, DEES, is issued by the EES decoder module 137 on a first signal line 139, and the DEES is received by a signal splitter module 141 that issues the DEES on a second signal line 143 and on a third signal line 145.
	www.freepatentsonline.com /5355140.html (5386 words)

	[No title]
		If the aircraft is not being subjected to unlawful interference, the pilot should respond to the query by broadcasting in the clear that he/she is not being subjected to unlawful interference.
		Controllers can expect pilots to report aircraft position and time the signal was first heard, aircraft position and time the signal was last heard, aircraft position at maximum signal strength, flight altitude, and frequency of the emergency signal (121.5/243.0).
		If the aircraft is at an airport where tower control or FSS advisory service is not available, or if the pilot ignores the threat at any airport, recommend that takeoff be delayed until the pilot or aircraft operator establishes that a bomb is not aboard in accordance with 14 CFR Part 121.
	www.faa.gov /ATpubs/ATC/Chp10/atc1002.html (3202 words)

	WSDOT - Emergency Locator Transmitters (ELTs)
		In 1975, aircraft owners appealed to Congress for relief from part of the ELT law since thousands of ELTs in use were found to be defective, replacement parts were scarce and the FAA interpreted the law such that an aircraft was not airworthy without a working ELT.
		About 20,000 aircraft were grounded waiting for a replacement ELT due to one manufacturer's design defect and another 15,000 were waiting up to a month for new ELT batteries for another defective model.
		American aircraft and boat owners with 406 MHz beacons who fail to register them or fail to affix a current NOAA registry decal to their beacons can face penalties from the FCC, FAA and/or U.S. Coast Guard, but to date no fines have been assessed.
	www.wsdot.wa.gov /aviation/SAR/ELT_History.htm (1607 words)

	[No title]
		Aircraft on a combination VFR/IFR or an airfiled IFR flight plan and 30 minutes have passed since the pilot requested IFR clearance and neither communication nor radar contact can be established with it.
		Aircraft operated in proximity to accident or other emergency or disaster locations may cause hindrances to airborne and surface rescue or relief operations.
		Therefore, radio frequency and transponder code changes should be avoided and radio transmissions held to a minimum, especially when the aircraft experiencing the emergency is at low altitude.
	www.faa.gov /ATpubs/ATC/Chp10/atc1001.html (896 words)

	Emergencies (Site not responding. Last check: 2007-10-12)
		when an aircraft fails to arrive within 30 min of the ETA last notified to, or estimated by, ATC, whichever is the later, except when no doubt exists as to the safety of the aircraft and its occupants.
		when an aircraft is known or believed to be the subject oi unlawful interference, except where evidence exists that would allay apprehension as to the safety of the aircraft and its occupants.
		If an aircraft in an emergency is already transponding on an allocated squawk code, the pilot may not select Code 7700 unless he decides, or is advised to by ATC.
	www.estraha.net /atc/emergencies.html (855 words)

	Aircraft Radio Stations (Site not responding. Last check: 2007-10-12)
		Under certain conditions, two or more aircraft having a common owner or operator may be issued a fleet license for operation of all aircraft radio stations aboard the aircraft in the fleet.
		The frequency 121.5 MHz is the international simplex channel for use by aircraft in distress or emergency.
		Radio transmitters to be used in aircraft must be type accepted in accordance with Part 87 of the Commission's Rules except that radio transmitters to be used in conjunction with aeronautical public service frequencies must be type accepted in accordance with Part 80.
	wireless.fcc.gov /aviation/fctsht4.html (1547 words)

	Flight Service Station - Wikipedia, the free encyclopedia
		This frequency is the emergency frequency that a pilot would use to give a distress call or to seek help when lost.
		FSS use a system graduated emergency levels, when a flight plan's estimated arrival time comes close (within 1/2 hour), the FSS goes into the uncertainty phase, the flight plan information is rechecked, and the departure is verified.
		If the hour passes and the aircraft has not been found, the alert phase is reached and the communications search is intensified.
	en.wikipedia.org /wiki/Flight_service_station (1110 words)

	Fake watch - Breitling Emergency Watch
		It was developed specially for airplane pilots and crew who survived in a plane wreck or came through a forced landing to transmit an emergency signal on the 121.5 MHz aircraft emergency frequency in order to attract the attention of rescue-team.
		All the range of 11 styles of Breitling watches from the Emergency collection are water-resistant up to 100 feet and greatly vary in price from $3,100 to $55,000.
		Breitling also developed a chronograph version of the Emergency named the Emergency Mission that is more traditional looking, not having a digital display on the dial.
	www.cool-watches.com /breitling_emer.html (453 words)

	EA-6B Prowler
		The flight evaluation of the test aircraft validated all projections of the research program, and the performance, stability, and control characteristics of the modified aircraft were judged to be far superior to those of the basic EA-6B.
		The equipment is designed to allow Prowlers to jam at high power at specific frequencies in response to a threat, rather than having to preemptively jam across a broad spectrum, thereby reducing the amount of energy the radar is exposed to.
		The aircraft used in that analysis had 1,873 actual flight hours when the test began, and program management believes that factor was not considered in determining the current fuselage life limit.
	www.globalsecurity.org /military/systems/aircraft/ea-6-upgrades.htm (5002 words)

	Avionic Instruments, Inc. (AI2) - Frequency Converters
		Frequency Converters are supplied at power levels ranging from 1kVA single phase to 52.5kVA three phase.
		Frequency converters are designed to operate in the most stringent environments.
		Frequency converter units are qualified to meet FAA and military standards for mission critical equipment.
	www.avionicinstruments.com /p_frequency_converters.html (230 words)

	Navis.gr - EPIRBs
		The earliest EPIRBs transmitted on the aircraft emergency frequencies of 121.5 MHz and/or 243 MHz.
		They simply transmitted a signal, usually an alternating tone, to be received on the emergency frequency on a normal aircraft radio - 121.5 MHz being the civil emergency frequency, and 243 MHz the military equivalent.
		The signal on this frequency incorporates a coded message to provide identification of the vessel to whom the EPIRB is licensed.
	www.navis.gr /telecoms/epirbs.htm (2132 words)

	T-45 Goshawk
		The T-45A aircraft, the Navy version of the British Aerospace Hawk aircraft, is used for intermediate and advanced portions of the Navy pilot training program for jet carrier aviation and tactical strike missions.
		The aircraft provides the capability to train student naval aviators for high performance jet aircraft and to qualify students for a standard instrument rating and initial carrier qualification.
		Flight-test experience with the British Hawk aircraft had indicated that the aircraft was very reluctant to spin and that attempts to intentionally spin the aircraft usually resulted in a spiral with rapidly increasing airspeed.
	www.globalsecurity.org /military/systems/aircraft/t-45.htm (2487 words)

	Aircraft emergency frequency - Wikipedia, the free encyclopedia
		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 Distress (IAD) and 243.0 MHz for military use, also known as Military Air Distress (MAD).
		In the UK, 121.5 is monitored by the Royal Air Force Distress and Diversion Cells (known as "DandD") at the London Terminal Control Centre and the Scottish Oceanic and Area Control Centre, from a nationwide network of antennas.
	en.wikipedia.org /wiki/Aircraft_emergency_frequency (222 words)

	The Need for ELTs in Transport-Category Aircraft
		Emergency services took 14 minutes to locate the crash and 20 minutes to reach it—they first drove to the wrong end of the airport and saw nothing, then went back the other way until they found the airplane.
		The law does not exempt aircraft certified for extended overwater operation, but ELTs required for extended overwater operations are activated manually or by immersion in water, not by impact.
		The fact that if you fly a turbojet aircraft domestically for a Part 121 carrier, you don’t have to have an ELT on board is appalling, but equally appalling is learning that aircraft have been delivered with ELTs installed and then carriers have them removed.
	cf.alpa.org /internet/alp/2001/jan01p24.htm (1716 words)

	SAR - 4.0 AIRCRAFT EMERGENCY ASSISTANCE (Site not responding. Last check: 2007-10-12)
		When aircraft are equipped with dual VHF equipment, it is strongly suggested that frequency 121.5 MHz be monitored at all times.
		Where an aircraft is required by the laws of Canada to install two-way VHF radio communication equipment, no person shall operate that aircraft unless the radio communication equipment is capable of providing communication on VHF aeronautical emergency frequency 121.5 MHz.
		If the intercepted aircraft is not able to keep pace with the intercepting aircraft, the latter is expected to fly a series of racetrack patterns and to rock its wings each time it passes the intercepted aircraft.
	www.tc.gc.ca /CivilAviation/publications/tp14371/SAR/4-0.htm (2121 words)

	Navis.gr - Aircraft Casualties at Sea
		1.1 When an aircraft transmits a distress message by radio, the first transmission is generally made on the designated air/ground route frequency in use at the time between the aircraft and aeronautical station.
		The aircraft may change to another frequency, possibly another route frequency or the international aeronautical emergency frequencies of 121.5 MHz or 243 MHz.
		Should such an aircraft ditch, rather than the aircrew bale out, and it becomes necessary to remove them from their ejection seats while still in the aircraft, care should be taken to avoid triggering off the seat mechanisms.
	www.navis.gr /telecoms/aircraft.htm (817 words)

	ELT Update
		FAA regulations, Title 14Code of Federal Regulations section 91.207(d)(4), requires that an aircraft emergency locator transmitter (ELT) be tested annually for “the presence of a sufficient signal radiated from its antenna.” The Aeronautical Information Manual (AIM) in Chapter 6, Section 6-2-5, discusses ELTs, their use, and how to test them.
		If the ELT being tested could not be isolated within an approved radio frequency shielded room or container, which keeps the signal from going beyond the room or container, a radiated test could be done within the first five minutes after the hour.
		Frequent false alarms could also result in complacency and de-crease the vigorous reaction that must be attached to all ELT signals.
	www.iflyamerica.org /elt.asp (1153 words)

	The 406Mhz ELT (Site not responding. Last check: 2007-10-12)
		We also discussed some of the problems associated with this ELT such as containing a transmitter that is prone to drift off frequency and a false alarm rate of 95.7% along with the whippy 100mW transmitter.
		Studies show that while the initial survivors of an aircraft crash have less than a 10% chance of survival is rescue is delayed beyond two days, the survival rate is over 60% if the rescue can be accomplished within eight hours.
		During transmission, the 406 ELT will transmit digitally an encoded message which provides information such as country of origin, tail number of aircraft, aircraft type, emergency contact, serial number of the ELT and (with the proper options) position data derived from an internal or external navigation receiver.
	www.avionicswest.com /articles/406elt.htm (1405 words)

	Emergency Frequency... - Page 2 - The RadioReference.com Forums
		Aircraft Monitoring Forum This is the place to discuss monitoring aircraft communications, including ACARS digital transmissions.
		Even so, don't ever play around on emergency frequencies and pilots, be sure your beacon is off when you exit the aircraft.
		We found the aircraft and since the aircraft was open, I reset the ELT.
	www.radioreference.com /forums/showthread.php?p=384250#post384250 (1465 words)

	J A A R S: Maritime Safety and Survival Equipment
		Emergency Rescue Kits are recommended for those traveling by water and/or land with search and rescue (SAR) services.
		The Marine 5-watt handheld aircraft and/or marine radio is used to communicate with the SAR team and/or passing planes or ships at sea.
		It is the size of a cell phone and covers the international emergency frequencies.
	www.jaars.org /maritime_services/water-safety-kits.shtml (832 words)

	Yenra Glossary A (Site not responding. Last check: 2007-10-12)
		aircraft emergency frequency - An international aeronautical emergency frequency, such as 121.5 MHz (civil) and 243.0 MHz (military), for aircraft stations and stations concerned with safety and regulation of flight along national or international civil air routes and maritime mobile service stations authorized to communicate for safety purposes.
		The frequency of the center of the radiated bandwidth.
		assigned frequency band - The frequency band within which the emission of a station is authorized; the width of the band equals the necessary bandwidth plus twice the absolute value of the frequency tolerance.
	www.yenra.net /glossary/a.html (13780 words)

	Breitling Emergency Watch
		The Breitling Emergency is the first watch of its kind in the world.
		The Emergency was designed for airplane pilots and their crews to help them get rescued if their plane crashed.
		This watch comes with a built in emergency transmitter that transmits an emergency signal on the 121.5 MHz aircraft emergency frequency.
	www.lussori.com /Breitling-Emergency-Watch-Overview.html (298 words)

	High Frequency
		Due to the inherent line of sight limitations of VHF radio equipment when used for communications in international oceanic airspace, those aircraft operating on an IFR or controlled VFR flight plan beyond the communications capability of VHF will be required to maintain a continuous listening watch and communications capability on the assigned HF frequencies.
		Although these frequencies will be designated by Air Traffic Control, actual communication will be with general purpose facilities such as international flight service stations or Aeronautical Radio, Inc. (ARINC).
		Aircraft departing the northwest U.S. on long range flights contact SAN FRANCISCO on ARINC frequencies 129.4 MHz and 129.85 MHz to obtain primary and secondary HF frequencies.
	microvoltradio.com /high_frequency.htm (859 words)

	Galawatches (Site not responding. Last check: 2007-10-12)
		Designed for pilots and aircrews, the BREITLING EMERGENCY is an instrument watch with built-in microtransmitter broadcasting on the 121.5 MHz aircraft emergency frequency.
		The EMERGENCY's tranmitter is activated by unscrewing a protective cap and pulling the antenna out full.
		Over flat terrain or calm seas, the transmitter's signal on the 121.5 MHz aircraft emergency frequency has a range of about 160 kilometers (100 miles), assuming the search aircraft is flying at 6000 meters (20,000 ft).
	www.galawatches.com /ShowProduct.aspx?prodid=5081 (173 words)

	ELTs from Aircraft Spruce
		Emergency Beacon Corporations ELTs are among the most popular on the market today due to their size, weight and convenience.
		By use of an optional programming adapter, the ELT can also be programmed with the aircraft's 24-Bit address for fleet operators as well as other custom programming.
		All 3 emergency frequencies (121.5/243.0 and 406.028 MHz) utilize the same RF output, which requires only 1 coax cable to connect to the new series of Artex single input antennas.
	www.aircraftspruce.com /menus/av/elt.html (483 words)

	Cool Tool: McMurdo Fastfind Plus
		Fastfind Plus also transmits on the International Aircraft Emergency Frequency of 121.5 MHz providing a homing signal for the Search And Rescue (SAR) services.
		With the combination of an integral GPS and satellite transmitter, Search and Rescue authorities can be notified of your emergency along with your pinpoint location within minutes, anywhere in the world.
		I might mention that these devices are only to be used in the most dire, life-threatening emergency.
	www.kk.org /cooltools/archives/001008.php (244 words)

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