Do you know of any standards from any agency for deep or nitrox courses that allow for taking an untrained student into penetration wrecks with 15m to an opening, while being on wrecks "29-32"m down, with just a 12l tank, likely exceeding the 1.4 MOD for the nitrox being used?? While I'm not an instructor, I can't believe that would be acceptable to any agency. Not being trained in wreck penetration yet diving in a wreck, stirring up silt, and having less than 3ft of visibility, not even being able to see his instructor? That's "to standards" for some agency??
You must have missed me saying “some”. For example it was stated that being next to the hull of a wreck such that it was overhead was a “standards violation” really? He could swim off sideways into free water by my (possibly incorrect) understanding.
By throwing rocks at the OP nobody is learning anything. We don’t know the actual site or likely conditions. If you asked me to describe a cenote dive vs a cave dive I wouldn’t be able to tell you the difference from my very limited experience inside a cenote. It would probably sound just like a cave dive. Maybe that is what is happening here.