What has been said several times in this thread but seems to be repeatedly ignored is that different safety rules apply to different people. If you are a brand new diver, you are advised not to dive deeper than 60 feet. Get further training and experience, and your limits get deeper. For recreational divers, the absolute safe limit often described is 130 feet. That is probably true for 98% of the world's divers.
Technical divers get a lot of very serious training in their classes, training most recreational divers cannot imagine. As they progress through those classes, their depth limits change. I will use the PADI tech progression to illustrate that because the titles of the certifications include the depth limits in meters. Here is the sequence of courses you will take in PADI's sequence for decompression diving:
1) Tec 40
2) Tec 45
3) Tec 50
4) Tec 65
5) Tec 90
The first in the sequence (Tec 40) is an introductory course for extended time at recreational depths. Tec 45 is actual tech diving begins.
Cameron's dive was at the Tec 45 level.
Technical divers get a lot of very serious training in their classes, training most recreational divers cannot imagine. As they progress through those classes, their depth limits change. I will use the PADI tech progression to illustrate that because the titles of the certifications include the depth limits in meters. Here is the sequence of courses you will take in PADI's sequence for decompression diving:
1) Tec 40
2) Tec 45
3) Tec 50
4) Tec 65
5) Tec 90
The first in the sequence (Tec 40) is an introductory course for extended time at recreational depths. Tec 45 is actual tech diving begins.
Cameron's dive was at the Tec 45 level.
