September 2014- Five-and-a-half years ago, Search and Rescue Satellite (SARSAT) monitoring of the 121.5 MHz and 243 MHz emergency frequencies ceased. Citing statistics that indicated many more false alarms than actual emergencies, the international consortium that administers the global network of search and rescue programs called for mandatory conversion to a new system operating on 406 MHz beginning Feb. 1, 2009.
Please login to continue enjoying members-only content
This section of the article is only available for our subscribers. Please click here to subscribe to a subscription plan to view this part of the article.