06 / 09 · TDI & PSAI Catalogue
TDI · Single-tank deco
Basic Decompression.
Planned decompression on a single-tank recreational rig, plus one stage. A gentle, controlled introduction.
What this
course is.
Not every diver wants to commit to a twinset before they understand what deco actually feels like. This course gives recreational divers a structured first taste — planned staged decompression on their existing single-tank rig with a single stage bottle, capped at 40 metres and 15 minutes of deco. Most move on to Decompression Procedures afterwards. Some do not — and that is fine.
Who this
course is for.
- Recreational divers curious about deco without yet buying a twinset.
- Divers extending bottom time on local wrecks within strict limits.
- Anyone evaluating whether full tech is for them.
Ref
Skill
What it means
01
Single-tank + stage
Routing, clip discipline, switch protocol with one extra cylinder.
02
Planned short deco
Up to 15 minutes of stops. Run-time. Conservatism.
03
Best-mix on rec gear
EAN 32 to 40% nitrox as your back gas or stage.
04
Stop discipline
Buoyancy and trim on stops. The same dive every time.
05
Lost-gas contingency
What happens if you cannot reach your deco gas.
06
Honest evaluation
At the end, you know whether you want a twinset next.
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
- 30 logged dives
- Single-tank rec configuration is fine
- Minimum age 18
In the
course price.
- In-water training dives
- Stage cylinder rental
- Course manual
- Honest debrief on your fit for full tech
Plan
for these.
- Certification fee
- Gas at cost
- Boat fees
- Personal kit
Next
Decompression Procedures
The full course on twinset or sidemount. The gate.
VIEW →
Base
Intro to Tech
Twinset and long-hose foundation if you skipped it.
VIEW →
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.