YESSSSSS! I made it! There's a new crop of cavern divers just created today. Of course, as the instructor put it, we had just earned our "learner's permit" & that we need to practice, practice, practice our newly learned skills to perfection (looks like I'll be busy for quite a while). We conducted our class in the local quarry as the logistics to get to an actual cavern wasn't possible at this time. I would say the roughest part was the part where we had to run reels in water starting at 20ft deep & ended up at 10ft. We were trying to tie off & secure the line whilst also controlling buoyancy. Going shallow, of course, my buoyancy got light & I tended to want to float off & going deep, I tended to go quite negative, making it difficult to stay off the bottom & not stir up the silt. To top that off my mask kept either fogging up or flooding, so I couldn't see a basted thing the entire exercise. It started to tick me off after a few minutes. Exercise 2,an OW Instructor & I teamed up to follow a line course with duct taped masks (blind folded) & doing an air sharing drill. We actually managed to survive it. It wasn't pretty, but we made it. Exercise 3 we did the actual overhead environment. We ran reels through a sunken RV, followed the line back trough & out, then went back through again with the blacked out masks & air sharing & then took up the reel & wound it all back up, then switched roles. It was a long, tiring day, but very educational & rewarding.