rapidiver:
Body was discovered about 30 feet off the tip of the jetty with tank valve snarled on lobster pot line
Ugggg, in my earlier post in this thread I had posted about this exact type of entanglement. As I mentioned then, with multi-pot lobster trawls the line can wrap around your valve almost in a cleat knot fashions. You are often working on the bottom (for a bug) and the line is above you. It's happened to me twice, it's scary in that the line pulls very tight and is weighted down by a few hundred pound of gear - you can't see it and it's very hard to reach (I can touch my valves in a single tank) but you need to reach even further back.
I would say this type of entanlment is just about impossible to free by hand - the line is so tight and it holds you in place. As I posted, the first time this happened - my buddy un wrapped me and it's still something we talk about now (a few years later) because he was so freaked out by how tight the line was around my valve. The second time, I reached up and cut the line.
In terms of this accident: sometimes it's good to afraid. The fact that this guy had no BC is disturbing. Lots of people with big egos don't find out that their skills suck untill it's too late. I don't like to dive with people that are not afraid at least a little bit.
Clearly, panic must have been a factor - he was not even close to running out of gas and he did not even deploy his knife.
Also,
in this case - ditching your weight is the LAST thing you want to do. In fact, moving lower in the water column with actually remove some of the tensions. This was HUGE mistake.
Another bad move - this guy's tank was caught - not his body. If you dive solo, you need to be able to get out your gear. At worst, cut your should straps and swim up. Heck, a good freediver could have them swam back down and got his gear.
Please, if you get wrapped up, STAY CALM - close your eyes and fight the panic, then work your way out. If you don't think you can handle this scary situation - please train more in confined water.