Ah -- I was confused for like 10 minutes by this comment, since technical divers have gone as deep as 1,000 ft without "anymore than a wet suit" and commercial

Ah -- I was confused for like 10 minutes by this comment, since technical divers have gone as deep as 1,000 ft without "anymore than a wet suit" and commercial divers go beyond 300 feet all the time. It isn't the absolute pressure that's the problem (in this video)