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Personal Location Beacons Usage Grows
The active transponders, carried by boaters, pilots, hikers and others in case they become lost or incapacitated, typically employ a satellite system to pinpoint their location and process distress signals.
The use of PLBs and other types of emergency location transponders is on the rise. According to Cospas-Sarsat, the organization's alert data assisted in 435 distress incidents in 2005 (24 percent involving PLBs), in which 1,666 persons were rescued. In 2006, the Cospas-Sarsat system provided assistance in 452 search-and-rescue operations (279 triggered by 406 MHz beacons, 173 by 121.5 MHz beacons), rescuing 1,881 persons. Cospas-Sarsat estimates there are more than half a million 406 MHz distress beacons deployed worldwide.
The officials transmitted calls for help to shipping vessels, and three commercial ships were able to begin searching the area. Shortly thereafter, an aircraft from the Portuguese Navy found the yacht 74 miles west-northwest of Casablanca. The navy then directed a German commercial vessel, the MV Wappen Von Bayern, to the site, which was able to recover Baker.
PLBs are critical to solo sailors such as Baker, Harrison says. Although boats are often equipped with EPIRBs, which work the same way as PLBs, EPIRBs are more expensive and are normally fixed to a boat. "It is probable [Baker] chose the PLB because it is lower-cost than an EPIRB, and also because he is sailing alone," Harrison states. "That means it is important to have a location system that it is with you at all times."
McMurdo's two latest PLBs include the MAX and the MAX-G, additions to the company's FastFind line of PLBs. Both can now operate for up to 48 hours once activated (compared with the 24-hour activation life of previous models), thanks to new, lower-current circuitry on the PLBs. They can operate in temperatures of up to -20 degrees Celsius (-4 degrees Fahrenheit). The FastFind MAX G has an integral 12-channel GPS navigation receiver. Both models have passed Cospas-Sarsat technical testing, Harrison says, and are expected to be available the second week of February.
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