> How? Open water diver is 18m, advanced Open water diver is 30m. With „deep diver“ specialty, you’re at 40m. Correct. Those are the limits of those certificat

> How? Open water diver is 18m, advanced Open water diver is 30m. With „deep diver“ specialty, you’re at 40m. Correct. Those are the limits of those certifications. > I think you need to become an instructor to go deeper, that’s not the 2nd easiest qualification at all. In order to go down to deeper depths and returning you generally need a technical or professional certification. Anyone can go to any depth, as long they don't expect a reasonable chance to get back to the surface alive. PADI open circuit technical course go down to 50 but there are other agencies for technical diving with a bit better reputation, and those generally max out at 100. Most people who are trained for 80+ depth usually do so on a rebreather. Padi do have a 100m course for that. However with rebreathers, students mostly look towards specific instructors and not agencies. What agency a instructor uses is generally much less important than that you trust the instructor.