Mike W. wrote:
OK not to hijack this thread, but what you and Peter are saying about ELT's
has me confused. I assume the OP is talking about the standard,
been-around-for-twenty-years, 121.5 MHz ELT. How in the world would a
satellite orbiting thousands of miles above the earth pick up this signal,
let along get a fix on it? This is something I have never heard of.

dopler effect; the thing goes biiiiip biiiip biip bip then back to biip
biiip biiiip again :-) when it is at bip, you mark a line on the map
perpendicular to your path; repeat from a few different directions --
these satelites have polar orbits -- and you got a fix.

--Sylvain