A single bottle of any size and a pony is not ever the proper equipment for a legitimate penetration dive. This was a legitimate penetration dive. If you are on a sunken vessel with lots of holes for entry and exit there is a bit for forgiveness built in. This dive is plenty deep enough to force mandatory decompression in a penetration dive. Doubles (side-mount is double), proper gas planning and management (including possible deco gas), multiple lights, including a strong primary and enough reels and or spools for a safe dive and an emergency are just the start for descending multiple levels and all overhead.
Many dives without an incident does not equate to experience..............only luck. I hear a lot of talk about being certified for a dive. That's fine, but what is more important is that you are qualified for the dive you undertake. Whether or not the operation figured they would penetrate the vessel does not matter. In scuba diving I am responsible for my actions on a dive I choose to make.
In the end a man lost his life. He chose to use a single bottle and a pony. He chose to penetrate a vessel after being instructed not to. The biggest reason operations don't want you to penetrate and do deco dives is they are on a schedule. This is how they make a living. They are only responsible for a dive brief. In Florida it has been long established, by the courts, that a diver is responsible for the choices he or she makes. This diver made a choice and it cost him his life. It is unfortunate and, so very, sad for his friends and family. It does not make him a bad person. It makes him human and a man who made a choice that cost him dearly. It has happened before and will happen again.
In personal responsibility this means we should be frank about what happened and make sure we don't make those same mistakes. Mistakes were made. If all of us don't recognize this, and learn from it then his passing is for nothing. It happened. No one can change the outcome. What we can do is realize, we have, all, been this man in our own lives. We have made dives we weren't really prepared for. We have had drinks and then got behind a wheel and were thankful later we did not hurt any one or ourselves. We are humans. That's what humans do.
If I got the story correct this man was a public servant, a firefighter I believe. I can tell you that most of us in police and fire service will say this......If I die doing something stupid, learn from it and talk about it. If I do something I should have foreseen and it got me killed, talk about it and learn from it. If I try something new and it gets me killed, talk about it and learn from it. By virtue of who we are we tend to be risk takers. We run towards the fire, towards the gunfire and toward those who will harm the helpless. Sometimes we take risks that we should not because, well, because we just do. That's who we are and what makes us good at our profession when this "risk taking" is tempered with good sense and time.
To the Deceased diver......Rest in Peace and may we all take something from your experience that makes us better people and safer divers. Mark