For a few feet, the "upper cavern" is a cavern. After a few more, even though it is small, it is a cave. The lower "Cavern" as it is called, is a cave. There is a restriction that has to be navigated to get in and there is ZERO light unless you bring it with you. If the condtions topside get nasty, you can't even see the opening from inside with lights out. There is zero training for these conditions short of cavern training. AOW, DM, Divecon, Instructor, Master Diver...................Do not provide any legitimate training for this environment.
You can dive this, and get many dives there................but...............this does not create experience. You are only getting away with it. What if the rope break and the vis topside goes away? What if there is a cave in that ruins the visibilty? What if you light goes out? What plan do you have for this? How do you monitor your gas supply? What is your plan there?
This is not about "I'm a cave diver and you're not" This is about having the proper training to do this safely. I have a lot of dives, OW, commercial, Cave and have only had one really, true, close call. That was when my training meant the most. I have raised boats from the Industrial Canal in New Orleans and have never had an issue. I have dived some really tight and silty caves with Mat and Rob and never had an issue there.
My issue came in a large, high flow, cave while following all of the rules. By being careful I looked back at my buddy, like we are trained to do, and wandered into a passage off of the mainline that went to crap real fast. This passage was in perfect line with the turn in the main passage. It was about three feet tall and silted completely out in seconds. Because of my training I had a plan, as did my partner who I met and hour before the dive, and we both got out no worse for the wear.
Please don't take this as a "better than you" scolding. You very well may dive this all of your life and nothing will happen. But, if it does? Remember, OW, Cave, Wreck, whatever diving we do, and for whatever reasons we do it it is about FUN. Just take a minute and think about it.