On the face of it, these are in fact true statements. However I can't tell if you are are serious with this post given the context - you realize at least two of the divers are active cave instructors right? I'm not sure from whom they should take a refresher?

Quote Originally Posted by inverted_bear View Post
If you can't dive without messing up the cave then you have no business going into that environment in the first place.

I can definitely appreciate the distance factor, but they should take a refresher if their skills are really that rusty.