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for Satellite Distress Alerting In October 2000
the International Cospas-Sarsat Program, announced at its 25th Council
Session held in 406 MHz frequency
if they want to be detected by satellites. The decision to
stop satellite processing of 121.5 / 243 MHz signals is due to problems in
this frequency band which inundate search and rescue authorities with poor
accuracy and numerous false alerts, adversely impacting the effectiveness of
lifesaving services. Although the 406
MHz beacons cost more at the moment, they provide search and rescue agencies
with more reliable and complete information to do their job more efficiently
and effectively. The Cospas-Sarsat
Program made the decision to terminate 121.5/243 MHz satellite alerting
services, in part, in response to guidance from the International Maritime
Organization (IMO) and the International Civil Aviation Organization (ICAO). These two agencies of the United Nations are
responsible for regulating the safety on international transits of ships and
aircraft, respectively, and handling international standards and plans for
maritime and aviation search and rescue. More than 180 nations are members of
IMO and ICAO. NOAA, along with
the U.S. Coast Guard, U.S. Air Force, and NASA (the four Federal Agencies who
manage, operate, and use the SARSAT system) are strongly advising users of
121.5/243 MHz beacons to make the switch to 406. Meanwhile, anyone planning to buy a new
distress beacon may wish to take the Cospas-Sarsat decision into account. Find Out More!
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