ACR Electronics Cobham ResQLink PLB-375 Product Support Manual
Also see for ResQLink PLB-375: Instruction manual
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HOW THE BEACON WORKSHow your beacon summons help406 MHz beacons are a type of portable emergency equipment thattransmits a distress signal to search and rescue (SAR) organizations. Thepurpose of these beacons is to aid SAR teams in tracking and locatingships or individuals in jeopardy as rapidly as possible.The 406 MHz frequency is a worldwide dedicated emergency frequencythat is detected by a network of satellites called the Cospas-Sarsatsystem. This satellite system was established by, and continues to besupported by, its primary benefactors - the USA, Russia, Canada andFrance. The Cospas-Sarsat system has saved over 30,500 lives - andcounting - since its inception. To learn more about the system visitwww.cospas-sarsat.org.When a 406 MHz beacon is activated, the digital distress message is sentto Cospas-Sarsat satellites and, in turn, the distress message is relayedto SAR forces. The distress message contains the beacon UIN and onsome models the GPS location of the beacon. Additional informationabout the beacon is accessed by SAR forces from the beacon registrationdatabase. At the same time the 406 MHz signal is activated, a 121.5 MHzsignal is turned on. The 121.5 MHz signal is used by SAR forces to homein on the beacon as they approach it.The 406 MHz signal is detected by multiple satellites and from thatinformation the location of the beacon can be calculated. This data aloneis sufficient for SAR to find persons or ships in distress in a reasonabletimeframe. However, as a further enhancement, some beacons have aGPS engine onboard. This feature allows the beacon to acquire currentlocation coordinates from an internal GPS receiver. The purpose of thisfeature is to send an even more precise location of the beacon to thesatellites, i.e., latitude and longitude data. This helps SAR to reach thelocation even faster. 62. Anatomy Of A RescueUser TipLearn more about the Cospas-Sarsat satellitesystem: www.cospas-sarsat.org |
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