Didactic Path

CCR TDI Air Diluent 30/45 m

The CCR TDI Air Diluent 30 m or 45 m Decompression Limited course (the depth depends on the certificate the diver has) is the first step to the use of the close circuit rebreather (CCR).

The use of the CCR enables the diver to optimize the use of the breathing gases, provides him with an ideal blend and keeps the oxygen partial pressure (PPO2) steady.

During the course dives (minimum 6) the diver acquires the competences needed to autonomously dive with the CCR for the depth certified by the licence obtained:

  • Assembly and maintenance of the equipment;
  • Loop volumes management
  • Pre-dive gauging
  • Emergency procedures
  • Check and analysis of the CNS (central nervous system)

CCR Mixed Gas Diluent 60 m

After having acquired an extensive experience with the air diluent blend, the next stage is the CCR Mixed Gas TDI course: an important step to increase the depth range.

This course examines in depth the use of trimix blends as gas thinner and the fundamental differences between the close circuit and the open one during the decompression phase.

During the course, the techniques for diving using CCR Mixed Gas are treated theoretically and then applied in practice:

  • Calculation of off-board gas stocks
  • Primary and emergency planning
  • Calculation of equivalent narcotic depth (END)
  • Emergency procedures
  • Clearing and substitution of off-board gases

CCR Advanced Mixed Gas Diluent 100 m

This is the highest level of training offered by TDI in the CCR field. The CCR Advanced Mixed Gas course trains the diver to the use of the CCR in all its features and to the application of the procedures and strategies in deep dives.

Having the opportunity to reach the maximum depth of 100 meters the diver will experience new emotions by exploring new wrecks, caves and deep reefs.

It is an intensive course that focuses on all the necessary elements fundamental for dive planning and to dive at this depth.

The course deals with:

  • Team planning and emergency plans
  • Solution of possible critical situations
  • Selection of off-board gas and diluent gas/li>
  • Calculation of equivalent narcotic depth (END)
  • Calculation of the off-board gas stocks
  • Clearing and substitution of off-board gases