Advanced Nitrox

The TDI Advanced Nitrox Course qualifies divers to use enriched air nitrox from EAN 21 through EAN 100 within your current certification level to a maximum depth of 40 metres/130 feet during dives hat do not require staged decompression. Often taught in conjunction with the TDI Decompression Procedures course, this can be considered the foundation of your technical diving career. Advanced Nitrox is also a great course for those wanting to extend their bottom times in shallower depths such as scientific diver, and a must for SCR or CCR divers.

The course cover topics like 
Equipment requirements 
Dive planning
Oxygen tracking
Blending methods

Open Water Execution 

1. Four dives are required with a minimum accumulated bottom time of 100 minutes 

2. If advanced nitrox is taught in conjunction with decompression procedures*, only a total of 6 dives are required, more may be conducted at the discretion of the instructor, with a maximum depth of 45 metres / 150 feet 

3. If Advanced Nitrox is taught in conjunction with Intro to Tech*, only a total of four (4) dives are required, more may be conducted at the discretion of the instructor, but all dives must be conducted at depths within the diver’s current level of certification and no dives should exceed 23 metres / 75 feet 

4. Only 2 dives from advanced wreck course may be credited towards the total dives required Course Structure 

1. TDI allows instructors to structure courses according to the number of students participating and their skill level 


1. The minimum number of classroom and briefing hours is 6 

*A 3-way combination of TDI Intro to Tech, Advanced Nitrox and Decompression Procedures is permitted with a minimum of 8 dives required. The prerequisites for advanced nitrox and decompression procedures diver must be met for this combination before starting the program. 

 Required Equipment 

The following equipment is required for each student: 

1. Alternative second stage octopus attached to a primary regulator or a redundant scuba unit; 1.9 litre / 13 cu ft minimum 

2. A submersible pressure gauge 

3. Depth gauge and automatic bottom timer and/or dive computer 

4. Buoyancy compensator device (BCD) with power inflator 

5. Line cutting device 

6. Exposure suit adequate for the open water environment 

7. Cylinder and regulator properly labeled and cleaned as required for EAN mixtures 

8. Access to oxygen analyzer, may be supplied by instructor 


Student Prerequisites 

1. Minimum age 18, 15 with parental consent 

2. Minimum certification of TDI Nitrox Diver, or equivalent 

3. Show proof of 25 logged open water dives 

This course is run over three days if taught stand alone or five days if combined with the TDI Decompression Procedures course. Students looking at moving into further technical diving courses will need Advanced Nitrox certifications to enroll on the higher technical dive courses

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