Killaloe Coast Guard Unit after over eight hours searching located three active emergency beacons, ELT's in the O'Brien's Bridge area. The Local Killaloe Unit of the Irish Coast Guard wish to advice all owners of emergency beacons, ELT or EPIRB to keep them in a dry cool area and make sure that batteries are fully charged.
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Distress radio beacons, also known as emergency beacons, ELT or EPIRB, are tracking transmitters which aid in the detection and location of boats, aircraft, and people in distress. Strictly, they are radiobeacons that interface with worldwide offered service of Cospas-Sarsat, the international satellite system for search and rescue (SAR). When manually activated, or automatically activated upon immersion, such beacons send out a distress signal. The signals are monitored worldwide and the location of the distress is detected by non-geostationary satellites, and can be located by some combination of GPS trilateration and doppler triangulation.
The basic purpose of a distress radiobeacon is to help rescuers find survivors within the so-called "golden day" (the first 24 hours following a traumatic event) during which the majority of survivors can usually be saved.
Since the inception of Cospas-Sarsat in 1982, distress radiobeacons have assisted in the rescue of over 28,000 people in more than 7,000 distress situations. In 2010 alone, the System provided information which was used to rescue 2,388 persons in 641 distress situations.