ELT 121.5 TSO C91A
Phase out
The International Cospas-Sarsat System has ceased satellite processing of 121.5/243 MHz beacons on February 1 2009. Only 406 MHz beacons will be detected by the Cospas-Sarsat satellite system. This affects all ELTs 121.5 TSO C91A.
Cospas-Sarsat made the decision to cease satellite processing of 121.5/243 MHz beacons in response to guidance from the International Civil Aviation Organization (ICAO). The United Nations organization mandates safety requirements for aircrafts and has recognized the limitations of the 121.5/243 MHz beacons and the superior capabilities of the 406 MHz alerting system.
The digital 406 MHz beacons offer many advantages over analog 121.5/243 MHz beacons. With a 406 MHz beacon, the position of the distress can be relayed to rescue services more quickly, more reliably and with greater accuracy.
View the information from Transport Canada and how it will affect.