This is the second level certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for mixed gas diving using a Helitrox Diluent. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills, to a maximum of 45 metres/150 feet, using an air/nitrox/helium diluent for formal decompression diving. Students are permitted to utilize a diluent and bailout mix with no greater than a 35% helium content and no less than a 21% oxygen content, and are permitted to use up to 100% oxygen for decompression.

Who this course is for:

The certified TDI Air Diluent Diver (or equivalent) who is looking to extend their depth limitations, learn CCR decompression procedures, and reduce narcosis
The open circuit TDI Advanced Nitrox and Decompression Procedures or Helitrox Diver looking to utilize CCR technology to extend their depth limits and bottom times

Course Duration:
Courses should not be treated as a race or something that can be skipped through quickly. Please remember training does not guarantee certification, we need to ensure you fully understand the training and will be a safe diver on certification. We follow a loved one clause that when certified we would be happy you could safely dive with one of our loved ones.

We will strive to meet your timelines and requirements where possible and will always be dependant on student availability to attend sessions.

Course prerequisites & forms:
Minimum age 18
Proof of 50 logged dives
Minimum certification level of TDI Advanced Nitrox Diver, Deco Procedures Diver or Helitrox diver or equivalent from agencies recognized by TDI
If the rebreather is a TDI approved sidemount rebreather, the student must hold the TDI Sidemount Diver Certification or equivalent and provide proof of 10 logged sidemount dives
Forms:
Medical Form
Liability Release

What you can expect to learn:
The TDI Diving Rebreathers Student Manual and the manufacturer’s manual are mandatory for use during this course but instructors may use any additional text or materials that they feel help present these topics. The following topics must be covered during the course:
History and evolution of rebreathers
Comparison of open circuit, closed circuit and semi closed circuit rebreather systems and the benefits/problems with each
Practical mechanics of the system
Assembly and disassembly of the unit
Layout and design of the unit
Absorbent canister design and maintenance
Proper packing of canister, in accordance with manufactures recommendations
Breathing loop de-contamination procedures
Manufacturer supported additional items (automatic diluent valve, etc.)
Gas physiology
Oxygen toxicity
Nitrogen absorption
CO2 toxicity
Gas consumption
Electronic and manual systems design and maintenance
O2 metabolizing calculations
Fuel cells
Maintenance
Replacement
Manufacturing date
System electronics functionality and calibration procedures
Dive tables
Constant partial pressure of oxygen (PPO2) theory
Central nervous system (CNS) and awareness of oxygen tracking units (OTU)
Dive computers
Mix ajustable
Constant PO2
O2 integrated
Dive planning
Operational planning
Gas requirements including bailout scenarios
Oxygen limitations
Nitrogen limitations
Emergency procedures
Use of B.A.D.D.A.S.S.
Three H’s problems
Flooded loop
Cell warnings
Battery warnings
Bailout gas requirements
Helium considerations
Helium absorption and elimination
Advantages of hyperoxic mixes for decompression
Advantages of helium for bottom gas
Hypoxia
HPNS
Effects on respiration
Effects as an insulator
Helium limitations

What’s in it for you?
Upon successful completion of this course, graduates may engage in decompression diving activities utilizing a CCR without direct supervision provided:
The diving activities approximate those of training
The areas of activities approximate those of training
Environmental conditions approximate those of training
Upon successful completion of this course, graduates are qualified to enroll in:
TDI Mixed Gas CCR unit specific course
TDI Advanced Wreck Course

How to take this course?
Get in touch with us by phone, whatsapp, facebook or e-mail

Price & Value:
TDI Helitrox CCR – Please Enquire
*Fully inclusive of all e-learning, training and certification on successful completion. Gas costs are separate and instructors Gas bill must be covered by students.

We focus on and are proud of the skill level, knowledge, decision making, experience and readiness of divers to dive at levels which they have been trained. We want to invest in you, your safety and ability to dive, then come home with amazing stories.

Our courses are priced as such and we do not hide additional costs. We are are very flexible for training, especially in terms of dates or location as we know we all have busy lives and work commitments. However if for reasons outside of weather, illness or other such emergencies a course/training can not be completed in the standard training schedule we will charge for extra days at €150,00 per day.