There are some alternates with varying degrees of effectiveness. For those that aren't aware, N6EA is actually my amateur radio callsign, so from that perspective I can suggest a couple solutions. Ham radio has a system called APRS (automatic position and reporting system) that many pilots use to track their airplanes while in flight. It is basically a system of VHF digipeaters, some of which are connected to the internet. These fixed stations relay the digital information supplied by GPS receivers, connected to vhf transmitters in the aircraft. The info provided is updated at a chosen rate and you can track aircraft in flight (or on the ground if you are with reception range of a digipeater) via the internet. Search and rescue has been using the APRS system in conjunction with ham radio operators for years to track resources and map search areas. You can assemble an APRS transmitter that will conect to any handheld GPS for around 100.00. or you can build an interface to work with a vhf handheld radio and GPS for about 30.00. (This is what I did). The benefit of using a handheld transmitter is you can also use it for communication via either simplex, repeater or even AMSAT. The latest amateur satellite AO-51 can be worked with 5 watts and a rubber duck antenna. I have personally made satellite contacts from Minnesota to Hawaii from central California via the Low Earth Orbit satellites. Dual band (vhf/uhf) handhelds run about 300.00. Of course there are also HF transcievers (starting about 500.00) that are utilized on board off shore vessels and transoceanic flights that can talk around the world with a simple wire antenna (di-pole). More info on all these things can be found at http://www.arrl.org
BTW, The PLB's or EPIRB's are pretty fool proof and can be easily activated without special knowledge. Often the KISS method is preferable, if you can afford it.
Sorry for the length of the post...
Mark





