Cours OC

STDA proposes 'Open Circuit' courses with 3 recreational levels and 3 for decompression diving. For divers that come from oher agencies that want to go on with advanced diving and don't know the hogartian configuration and the DIR approach the first course is the 'Intro to Tech-Fundamentals'.20180101 Flowchart corsi OC manuali

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 at:

  • R1 - Open Water Diver
  • R2 - Advanced Open Water Diver
  • R2 Deep - (includes the Rescue Module)
  • EANx Diver - (R1 & R2 course sections)
  • Intro to Tech-Fundamentals
  • T 1 - Trimix Decompression 50 mts
  • T 2 - Trimix decompression 60 mts
  • T 3 - Trimix Decompression 80 mts

A CCR3 course will start on 25 July. The Program will be developed as always through theory, shallow water and open water sessions, that will take place at lake and sea. Theory, shallow water and...
For the month of July is scheduled another CCR2 + OC Deco Exp coourse. The program for CCR1certified divers (or equivalent to STDA standards) will develop as always through webinars, shallow water...
Return from Sicily after some days of training to continue with the x-over program to Alberto S. to match STDA standards and procedures. Intense days alternated with moments of pause, enjoying the...

T1 – decompression Tri-mix 50 meters (STDA™)


The 'T 1' course aims to continuing the training of the 'Intro to Tech' certified diver and develops theoretical and practical knowledge through theory, confined water sessions and open water dives with decompression. The program included a refresh of the basic knowledge going on with the development of the decompression theory and procedures, technical diving skills and emergency procedures. At the end of the course the diver will be able to dive till maximum 50 meters depth using Tri-Mix and EANx mixes, applying the necessary decompression procedures.


  • be certified 'R 2 Deep' or 'Intro to Tech' or equivalent
  • medical certificate not older than one year; recommended PFO examination (Patent foramen ovale); non smoker
  • minimum age: 19 years old
  • documented experience of at least 45 hours of dives with rebreather

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

Program and duration of the course with 3 students

minimum days: 6

theory: minimum 12 hours

Theory sessions: 6 - ratio instr/student: 1/4

Final assessment: quizzes with multiple choice

Maximum percentage of allowed wrong answer: 20%

Exceeding the maximum allowable percentage leads to the repetition of the quiz not before than 1 week

Shallow water sessions: minimum 1 - ratio instr/student: 1/4

Open water dives: minimum 3 with a cumulated run time of minimum 150 minutes - ratio instr/student: 1/2

The maximum time for completion of the course: 6 months that if exceeded, the course must be repeated entirely

Certification limits

  • Max depth: 50 meters with mandatory tanks with adequate mixtures and volumes (liters of the mix)
  • Max pO2, Allowed for bottom mix: 1,2 ata
  • Max pO2, in decompression: 1,6 ata
  • Allowed bottom mixes: Tri-Mix - Max fHe 0,30 - 0,18≤ fO2≤ 0,20
  • Allowed decompression mixes: EANx - Max fO2 0,50 +/-0,01
  • For all the mixes fO2 range: +/-0,01


1250€ for training (manual + theory in classroom/web on-line, quiz, cw sessions and dives)

NOT included: mix, , 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: 200€/day

In case of 2 or more students and x-over, please contact the instructor for a quotation.



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Via delle Ghiaie, 22
38122 Trento (TN) - Italy
t. +39 347 5041939
P.IVA IT 02127010227
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