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I have been following some of this thread and wanted to contribute these 
 ideas:

1. 'Bondage' wings were primarily designed to keep the wing in close to 
prevent puncture while encountering sharp restrictions, such as 
encountered while wreck penetrating. I do not know that drag, quick and 
any position dumping, and slower inflation were major design 
considerations.

2. The bungees that keep the wing in close do not facilitate dumping 
from a dump valve in any position. If anything the preasure of the water 
does that. Ditto for quick dumping.

3. 'Bondage' wings and dual bladder wings neither contributed or bailed 
out the situation this particular diver was in. The second 
bladder/system is for failure of the primary bladder/system only. The 
bunges only keep the whole thing from going every which way.

4. Dual bladder wings are designed to be dove using the primary bladder 
first and in the event of any problem with that system, (the bladder 
tearing, inflator malfunction, reg shut down, etc.) the air is dumped 
out and the second bladder/system used. They were never designed to be 
used simultaneously.

5. If you have ice already formed in your gear from a previous dive and 
reenter the cold water it will take a long time for this water to melt 
the ice. Longer than most dives, including extreme ones. This is true 
for all really cold weather and water dives, ice diving or not.

Tom
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