05 / 09 · TDI & PSAI Catalogue
TDI · The depth gate
Extended Range.
From 45 m to 55 m, with up to two stages. The depth gate that opens the road to trimix.
What this
course is.
Past 45 metres, the rules change. Gas density goes up, narcosis goes up, decisions get more expensive. This course takes you to 55 metres on air with up to two decompression stages, builds the cold-water judgement that deeper diving demands, and prepares the in-water skill set you need before you ever pick up a helium fill.
Who this
course is for.
- Divers with Decompression Procedures wanting to push depth and bottom time.
- Wreck divers eyeing the deeper wrecks of Cabo de Palos.
- Anyone planning Trimix later who wants the depth conditioning first.
Ref
Skill
What it means
01
Two-stage management
Travel + deco. Clip discipline. Switch sequence. Stowage on ascent.
02
Deep air judgement
Reading your own narcosis. Slowing down. Saying no.
03
Extended deco
Stop times reaching the hour. Buoyancy without thinking.
04
Run-time discipline
Watch the clock. Hit the schedule. Adjust without panic.
05
Wreck navigation
Penetration limits, line drills, no-mount entries.
06
Helium-readiness
What changes at 55 m+ and why your next course is trimix.
4D
DurationIn-water + theory6
Training divesIncluding assessment55M
Max depthWithin cert limits1:2
Student ratioPer instructor€500
Course priceExcl. cert & gasBefore
you book.
- TDI Decompression Procedures
- 75 logged dives
- Twinset or sidemount kit
- Minimum age 18
In the
course price.
- Theory sessions
- Six in-water training dives
- Additional stage bottle
- Course manual
Plan
for these.
- Certification fee
- Gas at cost
- Boat fees for deep dives
- Insurance
Next
TDI Trimix
Helium for the 60 m wrecks. Coming next on the programme list.
VIEW →
Sideways
Intro to Cave
Past the daylight in Cueva del Agua, on the line.
VIEW →
Field
Wreck Week
Five days on the Sirio, Stanfield and Naranjito.
VIEW →
Start the
conversation.
A short message with your goals and certification history. No forms, no funnels — you talk to the instructor.