To what end ?

[citracaver]

I can see where not using a tether may make things easier,but still prefer to have one. I recall Bill Rennaker talking about a tank getting away from him, and the only thing keeping his tank from running away was a 3 cent cable tie on his mouth piece.

That would not be my idea of fun. Another thing to take into consideration is just how negative your tank setup is. I always try to set mine up with a way to adjust the boyuancy during the dive. A neutral tank is not gonna go anywhere fast.

[Kirk]

Castle Rock is actually a really nice cave system. I had a lot of fun the times I've been in there.