CAVING WITH BEGINNERS
There should be at least one experienced spelunker for every three beginners. However, never have less than two experienced spelunkers ...
There should be at least one experienced spelunker for every three beginners. However, never have less than two experienced spelunkers on any trip with beginners, so one can lead and one can bring up the rear. — David R. McClurg, speleologist
10/28/14