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Marv Gozum wrote:

> I'd go for redundancy with a mechanical SPG anyday.

The same here. I have seen A/I fail and have looked that the other diver's face
as he looked at a blank screen. I personally wouldn't care if the computer
fails (backup computer, and I run tables besides). But the spg... well, that's
like driving without a gas gauge. Of course the dive is aborted, but since I do
a lot of deco diving, I would like to have the spg for air monitoring.