Gents, thanks for the time and reading my missive.
The one thing that all of these incidents have in common, is that they are involuntary.

What about the 80' free ascent is "daunting"? Air, decompression? The plan is if on the bottom, wheels down, sideways or up, to exit the vehicle, probably already breathing off the "spare air", and activate the vest. Problematic from your perspective? If so please elaborate. Never dived, closest I get is mask snorkel and fins. Always interested in a better option, but I cant hold my breath that long, and if the other option is drowning...

Throw bags, Point taken, but this particular bag was chosen for it's size and it throws well. Just too good a opportunity to be unable to exploit. Two regular throw bags in the trunk. As always, no guarantees. Thanks again.