[aprssig] Underground APRS ? - Can we expand application to save lives?

[Geoffrey Dick]

Undergound APRS - Can we brainstorm a way to do this?

Here is a young man who found a way to send radio signals deep into
caves underground.   Can we expand his method with transponders, above
and below, to build a locator?   

See:  http://www.npr.org/templates/story/story.php?storyId=123116417&ft=1&f=1001 

ALL:  Let us put this listserver to good use.  We have on the APRSSIG
      a collection of those who are most familiar with using radio
      applications to build a locator system that can save lives.  
      Here is a real opportunity to show your stuff. 

Geoffrey, WA4IKQ