This link will get you to a web site that gives the run down on the latest survival radios that will be issued to our troops.
Great capabilities.

http://www.boeing.com/news/releases/2004/q1/nr_040119s.html
Click on the embeded Combat Survivor Evader Locator link and go to the User Equipment Segment for a run down on the capabilities. Quite a unit.
All data is available to the public.