Links:

Cave radio and electronics group - Organisation promoting the development of electronics for use in caves
Pease Beacon - Location beacon  developped by Brian Pease in the US working at 3kHz
Valade Beacon - Location beacon developped by Daniel Valade in France
Cave radio work in Belgium - work performed by Herman Jorens of the Avalon club
The cave page - general caving links
UIS conference on cave radio and electronics - Report on the 1997 meeting in switzerland
 
 
 
 

If you feel you have a relevent link please e-mail me.