I understand that Rousey's were able to come out of the collapsed book shelf situation but the time it took for the father to free the son from under the shelf meant that they were way out of their planned schedule. The decompression time accumulated in the process was too much to complete on back gas that they had and deco-bottles were already lost. Now my understanding of this is based on "Shadow Divers." I have not read "The Last Dive" so is there something else to it that I am missing?
As for John Ormsby, I have searched for his diving background and his cave diving credentials are not listed anywhere. His configuration is described as being
typical of Florida cave divers in the following words.
“Gary Gentile remembers that Ormsby’s belt looked like a carpenters tool belt. A hammer, an adjustable wrench, a crowbar, and pliers were slung from the spring gated snap hooks that hung from his belt. This kind of configuration was popular with Florida Cave divers, who were responsible for most technical diving configurations in the Sunshine state. But it was not 6the same in the cold depths of the Northeast. Wreck divers who frequent the Doria, call the snaps suicide clips.
In Florida there was little chance of “danglies” such as Ormsbys snap hooks or tools, snagging the smooth limestone walls of an underwater cave, but in the dark, confining passages of a wreck, all the twisted and collapsed steel seems to almost reach out and grab you. Streamlining your gear and minimizing your chance of snagging yourself with danglies is foremost in Doria divers mind.” (Page 14, Deep Descent)
My exposure to cave divers is limited to UTD and GUE and what is being described above would be a huge NO NO within that crowd. Not sure how other cavers would feel about this being "typical."