TDI Air Diluent Closed Circuit Rebreather Diver Course | CCR Certification

The TDI Air Diluent Closed Circuit Rebreather Diver Course is the entry-level certification course for closed-circuit rebreather (CCR) diving using air as a diluent. This course trains divers to safely plan and execute CCR dives within defined depth and decompression limits while developing disciplined procedures, system awareness, and effective bailout strategies.

At Extreme Watersports, the TDI Air Diluent CCR Diver Course is conducted on the Dive Rite O₂ptima CM, a proven and widely supported CCR platform suitable for both training and progression into advanced technical CCR diving.

What Is the TDI Air Diluent CCR Diver Course?

This course introduces divers to certified closed-circuit rebreather diving using air as the diluent gas. Divers learn how to manage oxygen addition, monitor PPO₂, control buoyancy and trim, and respond to CCR-specific failures while executing planned CCR dives.

The TDI Air Diluent CCR Diver Course is designed as a foundation for all future CCR and technical CCR training.

Course Objectives

By the end of the TDI Air Diluent Closed Circuit Rebreather Diver Course, divers will be able to:

• Assemble, configure, and maintain a CCR correctly

• Conduct complete unit-specific pre-dive checks

• Manage PPO₂ manually and electronically

• Maintain proper loop volume and breathing control

• Plan CCR dives using air diluent

• Execute controlled ascents and decompression (as applicable)

• Plan and perform effective bailout procedures

• Identify and respond to CCR malfunctions and failures

Course Structure

The TDI Air Diluent CCR Diver Course includes:

Knowledge Development

• Closed-circuit rebreather theory

• Oxygen physiology and PPO₂ management

• CO₂ control and scrubber management

• CCR dive planning and gas management

• Emergency procedures and failure handling

Confined / Controlled Water Training

• Unit setup and configuration

• Loop management and breathing techniques

• Manual PPO₂ control drills

• Bailout and emergency response skills

Open Water CCR Dives

• Planned CCR dive execution

• Task-loaded skill performance

• Controlled ascent and decompression procedures

• Real-world application of CCR diving skills

TDI Course Requirements

To enroll in the TDI Air Diluent Closed Circuit Rebreather Diver Course, students must meet the following requirements:

• Minimum age: 18 years

• Certification prerequisite:

  • Advanced Open Water Diver (or equivalent)

• Experience:

  • Minimum logged dives as required by TDI standards

• Medical:

  • Medical clearance for diving (if required)

Depth & Diving Limits

• Maximum depth: 30 meters / 100 feet

• Decompression: Limited decompression as permitted by TDI standards

• Diluent: Air

Equipment Requirements

• Closed-circuit rebreather (Dive Rite O₂ptima CM)

• Bailout cylinder(s) and regulators

• CCR-compatible dive computer

• Redundant monitoring systems

• Appropriate exposure protection

All equipment configurations are reviewed and standardized prior to diving.

Training Platform – Dive Rite O₂ptima CM

The Dive Rite O₂ptima CM is used for the TDI Air Diluent CCR course due to its:

• Manual and electronic PPO₂ control

• Robust and modular design

• Global support and availability

• Compatibility with advanced technical CCR progression

Training on the O₂ptima CM ensures skills learned are transferable to higher-level CCR courses.

Certification & Progression

Upon successful completion, divers receive TDI Air Diluent Closed Circuit Rebreather Diver certification, qualifying them to:

• Conduct CCR dives using air diluent

• Dive within course depth and decompression limits

• Participate in guided CCR dives to build experience

• Progress to TDI Mixed Gas CCR or equivalent advanced CCR courses

Who Is This Course For?

This course is ideal for divers who:

• Want to become certified CCR divers

• Are transitioning from open-circuit to rebreather diving

• Want longer bottom times and efficient gas usage

• Plan to progress into technical CCR diving

• Prefer structured, disciplined training

Book the TDI Air Diluent CCR Diver Course

If you are ready to begin closed-circuit rebreather diving with air diluent, the TDI Air Diluent Closed Circuit Rebreather Diver Course provides the correct foundation for safe and effective CCR progression.

📲 Contact Extreme Watersports to Book the TDI Air Diluent CCR Diver Course