"Roger Long" wrote in message ...
No problem. Pressure in the sub is surface or even slightly negative as O2 is absorbed in the body and CO2 in the
scrubbers.

There are a couple of snaps and creaks as the steel sphere compresses. Quite startling. I think it's about 3/8 inch
smaller in diameter on the bottom than at the surface.

The highest I've been in my 172 is now just about the same as the lowest I've been in the sub. I'm symmetrical about
sea level.

--

Roger Long



Symmetry is good - thanks for the post!