I do the other type of diving (going under the water instead of high above it) and this has really helped to put the depth into perspective.<br><br>I'm only qualified to go 18m down but it doesn't actually feel that deep. Then when I see her jump off a 20m platform it looks way higher than I thought it would.,(reply>), Yup, this makes safety stops and such <i>feel</i> much more acute and sensible, hahaha,(reply>), @AndyGneiss Pressure increases by about 1 atmosphere per 10 metres, so at 18 metres, you're at almost 3 atmospheres, including the 1 atm from the actual atmosphere. I've only been to 10m myself, and it feels shallow. I don't imagine 18 metres feels all that deep either. It's once you stop being able to see the sun things get scary.,(reply>), And water is so much heavier than air.  Diving really puts that into perspective when you see how compressed the bubbles are deep down.,(reply>), @Daniel Dekker It's definitely quite a lot of water above your body when you are that deep.,(reply>), What a great point! That does make 60ft (for us Americans) seem really deep! No wonder the pressure is so high.