High-precision Registered
An intermediate technology 406 MHz beacon (now mostly obsolete in favor of GPS enabled units) has worldwide coverage, locates within 2 km (12.5 km² search area), notifies kin and rescuers in 2 hours maximum (46 min average), and has a serial number to look up phone numbers, etc. This can take up to two hours because it has to use moving weather satellites to locate the beacon. To help locate the beacon, the beacon's frequency is controlled to 2 parts per billion, and its power is a hefty five watts.
Both of the above types of beacons usually include an auxiliary 25 milliwatt beacon at 121.5 MHz to guide rescue aircraft.
Read more about this topic: Distress Radiobeacon
Famous quotes containing the word registered:
“To have no son, no wife,
No house or land still seemed quite natural.
Only a numbness registered the shock
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How widely from the others.”
—Philip Larkin (1922–1986)