Daniel_

Surely this is not true, because the body is being pressurised equally within and without?

The breathing gas is at 2 bar, the water is at 2 bar, so the pressure differential across the body is at 2 bar.

If this wasn't the cse, your eyes woud implode and your tongue would shrivel up, surely?

I know physics and I know biology, but I don't know diving (other than the muff type).

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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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