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Airworthiness Notices - B029, Edition 2 - 23 November 1998406-MHz Emergency Locator Transmitter Registry Requirements(This Airworthiness Notice supersedes AN No. B029,
Edition 1) Introduction The purpose of this Airworthiness Notice is to advise aircraft owners/operators and maintainers of the encoding protocols which are to be adopted for emergency locator transmitters (ELTs) which transmit on 406 MHz. Background In 1988 an agreement was signed between Canada, France, the United States, and the former USSR to implement the COSPAS-SARSAT program. The COSPAS-SARSAT program incorporates satellites in near-polar and geostationary orbits to relay transmissions from emergency beacons to ground terminals. The system is designed to operate with the latest generation ELTs which transmit on 406 MHz. This frequency makes the ELTs more readily detectable by satellites than the 121.5-MHz ELT now in widespread use. Coding information such as location, identification of the beacon, vehicle and its country of registration, can be included in the 406-MHz distress signal. The ICAO and CARAC organizations are currently discussing the implementation and mandating the future use of this type of ELT. Canadian Aviation Regulation (CAR) 605.38 is in the process of being amended to require the registration of this type of ELT. Required Protocols In order to obtain consistency in the protocols used in Canada, the following User and Location protocols shall be adopted by the aviation community. User Protocols
Location Protocol Currently, some avionics systems have the capability of continuously updating the Fixed type ELT with the aircraft’s current position (Latitude and Longitude). For aircraft whose avionics and installation support this capability, it is recommended that the Standard Location protocol be used in conjunction with the Serial Aircraft 24-bit address User Protocol. ELT Registration Manufacturers of 406-MHz ELTs that are approved by Transport Canada Civil Aviation will be required to include COSPAS-SARSAT registration forms with all ELTs sold in Canada. Importing Aircraft into Canada
Change of Aircraft Ownership and/or Registration
Benefits It is anticipated that by maintaining a consistent coding standard within the country, the potential for duplicate codes is greatly reduced. Further, with the cooperation of the aviation community, a current ELT database with the Canadian Beacon Registry could aid in reducing the time spent in obtaining information on a suspected downed aircraft. Failure to register the ELT could result in delayed SAR response. Further Information For further information on the encoding standards please contact: Transport Canada, Civil Aviation For additional information on the COSPAS-SARSAT program please contact: Canadian Beacon Registry For the Minister of Transport K.J. Mansfield |
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