detroit diver:
While the story ended well, I'm not sure solo diving under the ice was such a bright idea.
Ice diving standards ususally require 2 divers + 2 tenders+ 2 safety divers. At the minimum, you probably should have had a tender at the surface, with a line MUCH heavier than your cave line.
How tragic it would have been for the next team of divers that had to go in......
I considered that. If this would have been more open water, I would have done that. I had two main safety factors that I was counting on. One was that I had redundancy in my doubles. Two was that with 200 cubic ft. of air on my back, I had enough gas to last for hours (literally) at eight ft. No deco stops from those depths either. Add in the fact that narcosis is a non-issue as well. Knowing that led to another safety factor... my ability to stay calm on the couple of entanglements that I did run into. I had plenty of time to work with.
This pond was small enough and shallow enough that while I was concerned, I wasn't likely to need a tender for this purpose. (I did get one offer, but she was from the Detrot area and that is about a three hour drive up here one way.)
So, I weighed the risk and took what I considered to be acceptable risk. I would have judged the risk differently if there would have been the possibility of getting blown into "bigger water" or if I had the possiblility of using up all of my gas in less than an afternoon. No, this is not recommended for everyone. Heck, I wouldn't suggest it for most. If I had a great buddy in the area, we would have done this as a team. But, for the people involved on this day in this circumstance, I feel that we did as well as we could have. But, there is a reason that I was using full tech gear. I did NOT forget that this was an overhead.
My two Labradors are my "children" as well. That is another reason that I wasn't going to back out.
PS, the property owner was topside the whole time. He said that was interested in the more well lit areas of the ice, because he could track my bubbles, LOL.