How deep can a scuba diver be certified for with tanks of compressed air and a scuba mask?

This is a duplicate question so I'll just bring my answer from the other one, over here.


The recognized limit is 130 feet for an advanced level recreational diver on air. This is not necessarily the limit that a technical diver may restrict himself to. It's not uncommon for a experienced tech diver that dives within their ability, to go to 150 to 170 feet on normal air. I've known a few that have dived 240 feet on a regular basis. They also happen to be experienced and have the proper training and equipment and observe decompression obligations.


That number of 130 feet is just that. A number that the certifying agencies have come up with for the average diver with average equipment and training, that in most cases will be safe for the diver.


The reverse can be true as well. There are some divers who can't get to 90 feet without being seriously nitrogen impaired.How deep can a scuba diver be certified for with tanks of compressed air and a scuba mask?
For recreational diving the limit is 130 feet.