The air would be at ambient, so no deco needed.
The air would be at ambient, so the ppO2 would be a touch higher than recommended
if you wish to avoid an O2 hit. Still, if you were totally out of the water, there might be no risk from drowning and I've heard it said that it's not the O2 hit which is dangerous, just the drownig as you fit. So maybe it would be 'interesting' rather than dangerous
