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#1
November 14th 03, 09:09 PM
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Tony Verhulst wrote:
Though much better thatn the 121.5 MHz units, I don't believe that the 406's transmit GPS coordinates like the 1.6 GHz units do - they use doppler shift instead. My understanding is that the 406 MHz units provide a 1KM resolution. Much better than the 121.5's but if you go down into a forest.... not good enough, IMHO. See http://www.navtec.de/english/elts.htm A 406 MHz ELT can transmit GPS position. I believe EPIRB was designed primarily for marine applications. The primary receivers are on geostationary satellites, which may not be very helpful if you happen to be in a canyon, or on the wrong side of a mountain... Marc 
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