If you're interested in technical diving, but haven’t yet met the prerequisites for the Tec 45/50 course.
You can start with the Tec 40 course. It’s the first sub vision of the Tec Deep diver course.
These are the first four dives. You use the PADI Tec Deep diver manual, which introduces you to:
1/Use Decompression software and dive computers to plan and make decompression dives with no more than 10 min deco time at max depth 40 meters/130 feet.
2/ Use a single cylinder of deco gas with max 50% oxygen to add conservatism to the required deco time.
And it gifs you credit for the Tec 45/50 course.
To start the course you must be:
1/Advanced diver or qualifying certification.
2/Enriched air diver or qualifying certification.
3/Deep diver or qualifying certification. Minimum of 30 logged dives, of which at least 10 dives were made with nitrox deeper than 18 meters.
4/And have a medical form signed by a physian.