Deco Diver 40

If the Deep Diver certification is not enough for you, but you want to try the most challenging diving experience, the Deco Diver 40 course introduces you to decompression diving.

The Course

It is a transition course between recreational no-decompression courses and technical courses where you can extend your time and depth limits.

The course skills you to dive up to a maximum of -42 m with decompression up to 15 minutes. All this still using recreational equipment, with some small refinements.

This course is available only in Italian.

  • 18 years old;
  • Advanced Open Water Diver
  • Deep Diver
  • Nitrox Diver
  • Have logged at least 40 dives, of which at least 20 to depths greater than 18 meters and at least 10 to depths greater than 30 meters, as documented by the personal Log Book

This course is available on ISDA e-Learning.

You can access:

  • downloading ISDA e-learning APP
  • via browser, at

Your Instructor will give you the code to access your studying materials: manual, review quizzes, videos and insights (if part of the course).

8 modules of theory

4 open water dives.

Ability to dive in pairs with other certified Deco Diver 40 or higher grade divers and without supervision, in dives that may include decompression stops for a total time of no more than 15 minutes at a maximum depth of 40 meters (an emergency depth is provided in case of 42 meter error.

For all courses ISDA release a printable diploma and a digital certification card.

Forgot your card? Don’t worry: you can retrieve it:

If deep diving fascinates you, keep going, with Deco Diver 47 and Deco Mix courses and then you’re ready for technical diving.