The full story can be found here:
http://www.equipped.com/406_beacon_test_toc.htmThe Fastfind that has the gps in it was found faulty by some tests. The manufacturer was unable to duplicate the errors. I'm told that the Coast Guard, who purchased about 12,000 units, did their own tests to be sure they wanted to keep them. After that, the CG bought more.
The non gps units present your location within an approximate 3 mile accuracy. Subsequent satellite passes will drastically improve this reading as triangulation becomes possible. Meanwhile, the unit is pumping out a simultaneous 128 Mhz epirb signal that is easily spotted by anyone searching for it.
The GPS models have been recalled for upgrading. The non gps models have nothing wrong with them. That's the one I use.
I am very happy with my McMurdo Fastfind 406, particularly the size and weight of it. It is small enough that I will actually use it and keep it on my person.
I figure that if I am not willing to carry a few days worth of drinking water on my body when out in the open ocean, then I had better have a few ways to be found before I dehydrate or more likely, become hypothermic. (55º-66º water) So I carry a 406 Mhz PLB on me, a signal mirror, a whistle (for fog), an omni-directional light, a waterproof vhf radio, a gps, a sky flare, a life jacket, a bottle of water, and a piece of line that I can use to tether myself to the first floating object that I find.
GARY
