Not a diver, but recreational divers often go down to that sort of depth on compressed air without any ill effects. You'd need to ascend slowly and hang about a

Not a diver, but recreational divers often go down to that sort of depth on compressed air without any ill effects. You'd need to ascend slowly and hang about at ten metres and five metres for about ten minutes to let nitrogen out of your system, to get back to the surface. It's about three times normal atmospheric pressure so it's not going to be ideal if there's an accident, but it's not like going to smash you flat with pressure, it's not going to Byford Dolphin you.