PADI (rec) Wreck Standards:
Would a PADI professional please share what exactly the standards say about the requirements and limits of penetration are in this class?
Sure--and it isn't all that good. As I reported elsewhere, I had a major debate with a member of PADI's central staff about it this past winter, and I offered alternative wording and standards. They said my wording was "excellent," and they said it will be both incorporated into both those standards and published as an explanation in their professional journal in the future.
The problem lies in two places: what is says and what it doesn't say (but it is assumed you will know on your own).
What It Says
It says that ALL penetration is ALWAYS limited to the light zone (natural light), with no entanglement hazards, and must make use of line being laid to guide the way out. It is as simple as that. No exceptions.
Our conversation started when I sent a link to a video a OW diver had made of a shallow wreck, a video in which he swam through the wide open corner of a wide open boat deck, being in an overhead environment for a few seconds before passing through and going on around the boat. I asked if the diver should have laid line. I then talked about a dive I had just completed with some of the really biggest names in American diving today, a dive in which every one of them did things like that throughout the dive, all apparently violations of the absolute rules stated emphatically in the PADI wreck course.
The reply was that none of those were violations because of what the standards do NOT say (but everybody knows).
What It Does NOT Say
1. "Penetration" ONLY refers to entering and exiting through the same opening. If you enter in one place and exit another, it is a "Swim-through." In all diving, PADI does not consider a "swim-through" to be an overhead environment--it is considered to be open water. The course does not mention swim-throughs, so there is no rule against them.
2. The difficulty level of swim-throughs varies from very simple to more complex. A very simple swim-through can be safely negotiated by a student doing OW training dives--I was quoted the official statement on that. As divers gain more skill through training and/or experience, they can gradually increase the risk level of the swim-through, using good judgment about their own ability and the danger of that swim-through.
3. Penetration limits as described in the course standards are for the beginning wreck diver. Like swim-throughs, as your skills increase, so can the complexity of the penetrations. For example, if you are skilled with light usage while laying line, you can exceed the natural light zone in your diving.
4. In ALL diving, divers need to make a realistic appraisal of their skill development in deciding if they can safely transcend the limits under which they were trained.
My alternative wording summed up all that the course does not say--all four points above.