StSomewhere:
The opening chapter of Deep Descent talks about an incident like this, about a cave diver's first and last dive on the Andrea Doria.
I believe you mean John Ormsby. He was on his first deep wreck dive
on the Doria. On that dive:
1. He got tangled on the traverse line, and had to be disentangled
2. He then sped below to keep his timetable on the wreck
3. Going too fast into the wreck, he probably aimed for a portruding bulkhead
to stop himself; instead, he got a hold of electrical cables
4. The cables pulled loose and dropped on him. He then plummetted down
the deck and landed on another diver, knocking her to the bottom.
5. He couldn't untangle himself, probably because his "suicide clips" caught
on the cable. When found, he was described as "a fork that someone has
stuck in spaghetti and spun around."
apparnetly, cave diving didn't prepare this diver for the man-made
entanglement hazzards in wrecks. i say "apparently" because it's not
clear to me whether Ormsby was really a certified cave diver or not, or
what his level was. This was 1985.