DonMarcosdeJuan wrote:I think most instructors should not teach wreck penetration as they dont have a clue how to do it themselves, it should be restricted to those instructors with some kind of overhead environment certification (as the cavern instructor rating requires a full cave cert).
I think very few recreational divers should be allowed to penetrate wrecks. Overhead environments dont really fall into the "recreational" diving parameters.
I'd agree with both of those. But I would add that it's important for divers to understand the limitations of wreck penetration.
Taking the Waikato, for example, which is were I prefer to teach Wreck. I do a lot of simulated land drills - line use, simulated air sharing etc. The intention is to get people to realise for themselves just how limited the pentration is that can be done safely without firther training.
I really think the only safe penetration on the Waikato for a diver without additional training, experience and equipment is the hanger. Even then, something can go wrong. I spend most of the wreck specialty around the hanger and get students to do a detailed map - how many exits are there? Where are they? How far apart? From each exit/entrance, what other doorways can be seen inside the hanger? Where are they?
A lot of this I picked up from a CD (Pete Mesley), and it was invaluable. Now looking forward to doing TDI Adv Wreck next month with Pete.
Some of the stuff I learn from Pete on this course will get turned into a land drill for when I teach Wreck.... as much as I would love to do lost line drills, air sharing through a restriction etc on a dive, that is way out of scope for the course but doing land drills that simulate this things to demonstrate the limitations (and why they are there) of the course I think makes sense.