02 / 09 · TDI & PSAI Catalogue
TDI · No-deco gas
Advanced Nitrox.
EAN 21 through 100. The whole no-deco gas spectrum, twinset or sidemount, max 40 metres.
What this
course is.
Enriched air, properly. Beyond the recreational nitrox sticker, this course teaches the gas analysis, MOD/ppO2 maths and best-mix logic that lets you push bottom time without yet stepping past the no-decompression line. The foundation under every TDI deco course.
Who this
course is for.
- Divers heading toward Decompression Procedures and Extended Range.
- Recreational nitrox divers wanting a tech-shaped understanding.
- Anyone using 50–100% O2 within recreational depth limits.
Ref
Skill
What it means
01
Best-mix maths
ppO2, MOD, CNS clocks. On paper before on a computer.
02
Gas analysis
Calibrate, analyse, label, sign off. Every cylinder, every time.
03
Multi-gas planning
Travel, bottom, deco — the logic of switching at depth.
04
Switch protocol
By the numbers, never by feel. NOTOX. Confirm. Breathe.
05
Conservative computer use
Conservatism, gradient factors, multi-computer redundancy.
06
Gear for rich mixes
Oxygen service, dedicated regs, cylinder protocols.
2–3D
DurationIn-water + theory4
Training divesIncluding assessment40M
Max depthWithin cert limits1:2
Student ratioPer instructor€400
Course priceExcl. cert & gasBefore
you book.
- Adv Open Water with Nitrox
- 25 logged dives
- Twinset or sidemount config
- Intro to Tech recommended
In the
course price.
- Theory + in-water training
- Use of analyser
- Twinset rental if required
- Course manual
Plan
for these.
- Certification fee
- Gas at cost
- Personal kit
- Insurance
Next
Decompression Procedures
Past the no-deco line. Plan and execute staged deco to 45 m.
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Bundle
Adv Nitrox + Deco
The two courses together at a lower combined price.
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Or sideways
Cavern Diver
First taste of overhead within the natural light zone.
VIEW →
Start the
conversation.
A short message with your goals and certification history. No forms, no funnels — you talk to the instructor.