Air Diluent CCR Decompression Procedures
Extends closed-circuit rebreather diving into staged decompression on air/nitrox diluent to 40m/130ft maximum depth. Teaches decompression gas planning, bailout procedures with mandatory decompression obligations, and risk management when ascent is no longer immediate. Second rung on TDI's CCR progression ladder.
Centres that teach this course
7 dive centres in the directory publish a price for this exact certification, checked Sep 2026. Each centre's own wording is shown beneath its name. Ranges cover whole-course prices only — where a centre charges per day or per dive, its rate is listed separately below, since a daily figure is not comparable with a course total.
- IDR 23,000,000total
- IDR 24,900,000total
- IDR 24,900,000total
Charged by the day or dive rather than as a course price:
- Cave AdventurersUnited StatesAir Dil DecoPrivate class$550/day→ $2,750 for the 5-day minimumGroup class$450/day→ $2,250 for the 5-day minimum each$550per day
- $425per day
- THB 56,900total
- Dive Systems MaltaMaltaTDI CCR Level 1: Air Diluent Deco Diver or Helitrox Diverone price, several agencies€1,400total
Same training under a different agency
5 centres
A separate set of centres, teaching CCR Air Diluent Decompression under a different agency. These are not the same certification — the standards and the card differ — but they cover the same depth and scope, which is why centres price them alike. Every row here names whose rating it is, and none of them is counted above.
- IDR 23,000,000total
- IDR 23,000,000total
- THB 55,000total
- THB 40,000total
- €1,400total
- €1,100total
Same tier, agency not stated
3 centres
These centres publish a price for CCR Air Diluent Decompression, but their own wording does not say which agency's certification it buys — many teach several and name the card only once you enquire, and some price one course for either agency. The figure is comparable; the certification is not identified, so we do not guess at one.
- €1,250total
- €1,250total
- £1,500total
- IDR 23,000,000total
These prices are not like-for-like. Two centres can charge very differently for the same certification because they include different things. One price may cover twinsets, stages, deco gas and cylinder rental for every training dive, a dedicated classroom for the theory, boat or transport to the site, and the agency's registration and materials; another may be tuition only, with all of that charged separately — or the other way round, with a centre bundling in extras the first leaves out. Class size, whether the course is one-to-one, and how many days are allowed for it move the figure too. Check what each centre's price includes before comparing them, and confirm with the centre before booking.
Consumables are usually extra. Sorb, helium, O₂ and other fills, park and cenote fees, certification fees and rental are commonly charged on top.
Packages combining several certifications, upgrades from an existing one, and open-ended day rates are excluded — none of them is the standalone price of this course, and including them would move the figures away from what a new student can actually book.
Prerequisites
(TDI Advanced Nitrox Diver AND TDI Decompression Procedures Diver with 50 logged dives) OR (TDI Air Diluent CCR Diver with 30 hours/30 dives on unit and 6 months CCR experience); Minimum age 18; Minimum 5 logged staged decompression dives to 30m/100ft as part of prerequisites
Standards
What a diver must demonstrate to pass this course — not always published by the certifying agency.
Minimum 7 dives with 420 minutes accumulated bottom time, maximum 40m/130ft depth. Pre-dive: staged decompression planning with bailout gas calculations. In-water skills: CCR operation in decompression, mandatory stop execution, bailout procedures with decompression obligation, emergency gas switching. Competency on unit-specific decompression procedures.
Instructors Teaching This Course
United States
Egypt
Indonesia
Malta
Philippines
Thailand
Dive Centres Offering This Course
United States
Indonesia
Egypt
Malta
Thailand
Mexico
We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.
Common questions about TDI Air Diluent CCR Decompression Procedures
How much does TDI Air Diluent CCR Decompression Procedures cost?
Published prices for TDI Air Diluent CCR Decompression Procedures range across 5 centres in the TecDiveTools directory — roughly US$1,250 to US$1,700 at current exchange rates. In each centre's own currency: IDR 23,000,000–24,900,000 (3 centres), THB 56,900 (1 centre) and €1,400 (1 centre). 2 centres charge by the day instead, which is not comparable with a course total. Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.
How long does TDI Air Diluent CCR Decompression Procedures take?
Between 3 and 7 days, based on the durations 5 centres publish for it. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.
What are the prerequisites for TDI Air Diluent CCR Decompression Procedures?
TDI's standards require: (TDI Advanced Nitrox Diver AND TDI Decompression Procedures Diver with 50 logged dives) OR (TDI Air Diluent CCR Diver with 30 hours/30 dives on unit and 6 months CCR experience); Minimum age 18; Minimum 5 logged staged decompression dives to 30m/100ft as part of prerequisites.
What is the minimum age for TDI Air Diluent CCR Decompression Procedures?
TDI's standards state: Minimum age 18.
How deep can you dive with TDI Air Diluent CCR Decompression Procedures?
TDI's standards for TDI Air Diluent CCR Decompression Procedures set a maximum depth of 40 m.
What does TDI Air Diluent CCR Decompression Procedures training involve?
According to TDI's published standards: Minimum 7 dives with 420 minutes accumulated bottom time, maximum 40m/130ft depth. Pre-dive: staged decompression planning with bailout gas calculations. In-water skills: CCR operation in decompression, mandatory stop execution, bailout procedures with decompression obligation, emergency gas switching. Competency on unit-specific decompression procedures.
What is the equivalent of TDI Air Diluent CCR Decompression Procedures in other agencies?
At the same tier in TecDiveTools' cross-agency comparison: RAID 40/45m (130ft/150ft) CCR Course, IANTD CCR Advanced EANx Diver and ANDI CCR Level 3. They cover comparable training, but each agency sets its own standards, depth limits and certification card, so they are comparable rather than interchangeable — check which one your next course accepts.
What course comes after TDI Air Diluent CCR Decompression Procedures?
The next step in TDI's progression is TDI Mixed Gas CCR.
Where can I take TDI Air Diluent CCR Decompression Procedures?
83 dive centres and 127 instructors in the TecDiveTools directory teach TDI Air Diluent CCR Decompression Procedures across 7 countries, most in the United States, Indonesia, Egypt and Malta. Each is listed further up this page.
Does the price of TDI Air Diluent CCR Decompression Procedures include gas and equipment?
Not always — it varies by centre. Sorbent and oxygen, certification fees, equipment rental and boat or site fees are commonly charged on top of the course price. Each centre's price list on TecDiveTools shows what it notes as included.