Rebreather courses

STDA provides 6 levels of training, three basic levels and three advanced levels, considering the diver level that enroll the course. There is also the Refresh CCR program, a workshop in half day or whole day with 1 or 2 in water sessions to restart diving after a period of inactivity. 2021 Flow chart REB senza Logo

Divers, already certified in R2 Deep in OC (or equivalent), can attend directly the 'Intro to Rebreather - Adv' , the fundamentals CCR training program of STDA.

The continuation is the 'Intro to Reb - Deep' course for recreational divers and the 'CCR 1' and 'CCR 2' courses for OC certified technical divers.

For all the courses it's possible to attend the theory sessions through the web. In this way you can use your time at the best. Same thing if you want to come in Italy to attend your courses. You can do the theory lessons before your coming. Contact us for more info:

Currently 'STDA' considers as rebreather of reference the followings:


Why CCR rebreathers?

Theoretically talking, the Closed Circuit Rebreathers are considered the 'state of the art' of scuba diving. In the past, the development of these systems, faced many stops but in the new millenium, in particular with the huge improvement of electronics technology, the closed circuit rebreathers started to have a wide diffusion. The reasons were quite obvious from long time: using for deep and/or long dives a rare, strategic and always more expensive gas as helium, the most efficient system was and is without any doubt the CCR system. CCR have also an other big advantage: a CCR is really lighter (26-36kg) than OC double tanks (>40kg minimum) or a pSCR (>45kg minimum). Your back will thank you.

Moreover, during the years STDA has acquired evidence that CCR diving decrease the risk of DCS in divers affected by PFO.

Marco Valenti, STDA founder, believes in this system for many years. He's a CCR user since 2004. He's a CCR Instructor Trainer, developer and tester.

Keeping always in mind that is a different way of diving, generally more complex, CCR needs a different appproach than the open circuit. This means that it is not obvious that an experienced open circuit diver is automatically suitable for the use of a CCR. The history and the direct experience in training have brought out it clearly.

For these reasons, STDA stares at the technical training mainly on rebreather diving, with the goal to develop the use of rebreather also in recreational diving. What it's needed, it's the 'right' rebreather and training.


The week will start  a new DPV Tech course. As always, the programme is divided into webinar theory sessions, dry laboratory and open water sessions. The program is aimed at divers with T1 or...
2022 begins with an important news for STDA. Since a few days in fact Alessio P. is a new STDA Instructor Assistant for rebreather courses on XCCR. With already a great experience on rebreather...
Congratulations to Francesco R. who today ended his course 'Intro to Reb - Adv' on the rebreather 'X' by IQsub. As always, the program was divided between theoretical lessons (online), dry...

Intro to Rebreather - Advanced course (STDA™)


The 'Intro to Rebreather-Advanced' is the CCR fundamental course that aims to introduce the certified scuba diver into rebreather diving, through the development of theoretical and practical knowledge with a specific program of theory, 'dry' lab and confined water sessions with at the end open water dives. The program leads step by step the diver to the correct use of the rebreather, develops all the required procedures, including emergency management. At the end of the training course the diver will be able to dive in team inside NDL, at 18, 30 or 40 meters of depth depending from open circuit certification hold. Part of the program is used also for x-over course.WEB copertina X CCR vers 1 0 0 ENG


  • be able to swim for at least 250 meters without stop and be able to perform short free dives
  • be Open Water Diver certified or equivalent
  • be Nitrox/EanX certified
  • Nitrox/EanX training can be done before the 'Intro to Rebreather- Advanced' course.
  • medical certificate not older than one year
  • non smoker
  • age: 18 years old
  • documented experience of at least 50 dives in open circuit

Before the course start, the instructor could ask to do an open circuit dive to evaluate the level of training of the candidate.

Program and duration of the course

  • Minimum days: On-line academics + 5 days (3 with aSCR Explorer)20190929 Lezione Online 2
  • Theory, including 'dry' labs: minimum 10 hours
  • Theory lessons: 5 (3 for aSCR Explorer) classroom or webinar
  • Final assessment: quizzes with multiple choice
  • Maximum percentage of allowed wrong answer: 20%
  • Exceeding the maximum allowable percentage leads to the conclusion of the course
  • Confined water sessions: minimum 2
  • Open water dives: minimum 6 with a cumulated run time of minimum 300 minutes (3 with aSCR Explorer)
  • Maximum bottom time for each dive: less than NDL
  • The maximum time for completion of the course: 6 months that if exceeded, the course must be repeated entirely

Certification limits

Max depth: 30 meters with mandatory out-board bail-out tank with adequate mix and volume (liters of the mix)

Maximum pO2, set point: 1,3 ata

Diluent allowed: air

Dive in overhead environment (cavern, cave, wreck, underice etc) and 'SOLO' diving not permitted.

Rough prices: on request (

NOT included: mixes, instructor 'room and board' for other locations, boats if needed and extra days for training or delays due to adverse weather conditions.

Extra training day cost: 250€/day


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