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Jumping in the water with my tank valve shut is one of my worst fears.
Same here...I
I'm sorry, I missed putting this in my original post. Didn't realize it until I read your post.
She said she would get into the water and the Captain would give her, her BCD in the water because she had bad knees and could not carry the weight on the boat. So the BCD had to have enough air to float when she got it from the Captain. Now, I did not see this, so I am going on how she said she would be getting her gear together for the dive.
Speculation...
Makes you wonder if the valve was inadvertently partially closed as her rig was placed in the water. You would think with her level of experience she would know to open the valve if that were the case, but then again with the inability to don her kit on the boat maybe she also no longer or never had the ability to reach her valve.
After dumping gas from her BC she may not have had the ability to inflate as the ambient pressure increased around her blocked first stage and subsequently went into an uncontrolled descent, gas compressing, suit compressing and the pain of not equalizing, maybe not able to get full breaths, distracted her to the point she was unlikely to recover. Of course a medical issue, other type of BC failure could also be plausible. Setting medical issues aside, clearly there was an inability to inflate her BC, ditch ballast and or swim up her rig. At the moment of an uncontrolled descent the pain from not equalizing would likely leave many divers incapacitated and unable to sort out problems and quickly act on solutions.
End speculation....
I'm glad to hear her body was recovered for the family, without her rig and a good investigator and despite an eye witness account I simply don't see any way we could get to the bottom of this. Of course this unfortunate incident does serve as reminder of the dangers of diving, especially on a dive where there is essentially no bottom for all intents and purposes. These deep wall dives really need to be taken with some extra precautions. Most importantly are you diving a balanced rig that you can swim up if you were to have a BC failure. A redundant gas source seems like a prudent decision as well.
One other issue I see here is pairing with the DM. She essentially did not have a buddy if anyone else had a problem. Which is exactly what happened.
I think most dead divers who are found are found with weights still secure, perhaps because they don't practice ditching. I practice that on the first dive of every trip to help me remember the option and how to reach to do so.Ditch the weight belt / integrated weights... Something everyone that dives has practiced doing before they got their learners permit = OW cert..
Her not doing this pretty much renders the idea that she was actively working to save herself moot, IMO.
My deepest condolences to all the people this tradegy has touched.
The posture described during decent could certainly have been her trying to reconnect a disconnected LPI. Head tilted, trying to see...Not finning, just working on the task... Oops can't quite get it...gonna have to inflate orally... Choking on a little inhaled water would take a few more precious seconds. Something like this may panic even a seasoned diver when realizing there is no bottom. Having as much experience as she had, I wonder if she stayed too calm for too long while trying to inflate her bc.
They say it's common for a diver to forget that they can just dump the weight if needed.
Stay safe everyone.
I am having a hard time understanding this search for thezebrashighly unusual causes of death in this situation.