A technical diver handling decompression stage cylinders during a dive

Photo by Teemu Virtanen · CC BY-SA 3.0

OC Tech (100m)IANTD

Trimix Diver

Official course standards ↗Last updated September 7, 2026

Advanced technical open-circuit diving using trimix gas mixtures to depths up to 333 fsw (100 msw) with extended decompression procedures. Teaches advanced gas blending, multiple-gas switches, complex decompression management, and self-reliance at extreme depths. Enables exploration of the world's deepest wrecks and cave systems.

Centres that teach this course

9 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.

THB 60,000across 4 centres pricing in Thai Bahtfrom ≈ $1,790
€995 – €5,000across 3 centres pricing in Eurofrom ≈ $1,116
$756 – $2,400across 2 centres pricing in US Dollar

Charged by the day or dive rather than as a course price:

One centre publishes a price in Indonesian Rupiah.

Same training under a different agency

19 centres

A separate set of centres, teaching Hypoxic / Advanced Trimix 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.

€800 – €5,000across 17 centres pricing in Eurofrom ≈ $897
$1,590 – $2,000across 3 centres pricing in US Dollar
  • Horizon DiversUnited States
    PADI Full Tec TrimixPADI TecRec
    $2,000
    total
  • Cenote Cave DivingMexico
    Advanced Trimix Diver TDITDI
    1 student$1,900
    2+ students (10% off)$1,710
    $1,900
    total
  • Squalo DiversMexico
    PADI Trimix DiverPADI TecRec
    $1,590
    total

Charged by the day or dive rather than as a course price:

  • Protec MexicoMexico
    Trimix Level 2PSAI
    1 student$470/day→ $2,820 for the 6-day minimum
    2+ students$420/day→ $2,520 for the 6-day minimum each
    $470
    per day
  • Cave AdventurersUnited States
    Advanced TrimixTDI
    Private class$550/day→ $2,200 for the 4-day minimum
    Group class$450/day→ $1,800 for the 4-day minimum each
    $550
    per day
  • Under The JungleMexico
    Advanced TrimixTDI
    private$345/day→ $1,725 for the 5-day minimum
    per diver in a group$295/day→ $1,475 for the 5-day minimum each
    $345
    per day
IDR 17,000,000 – IDR 20,700,000across 2 centres pricing in Indonesian Rupiahfrom ≈ $947
THB 50,000 – THB 63,000across 2 centres pricing in Thai Bahtfrom ≈ $1,491
₱34,000 – ₱60,000across 2 centres pricing in Philippine Pesofrom ≈ $539
  • Tech AsiaPhilippines
    TDI Advanced TrimixTDI
    ₱60,000
    total
  • Tech AsiaPhilippines
    PADI Tec TrimixPADI TecRec
    ₱34,000
    total

Same tier, agency not stated

1 centre

These centres publish a price for Hypoxic / Advanced Trimix, 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.

One centre publishes a price in Thai Baht.

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

Minimum 18 years old. Must hold one of: IANTD Technical Diver, Technical Cave Diver, Technical Wreck Diver, Normoxic Trimix Diver, or Normoxic Trimix Plus Diver (or equivalent). Proof of minimum 200 logged dives, with at least 25 dives to depths between 140 fsw (42 msw) and 200 fsw (60 msw).

Instructors Teaching This Course

Other locations

Michael David Fowler

Dive Centres Offering This Course

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 IANTD Trimix Diver

How much does IANTD Trimix Diver cost?

Published prices for IANTD Trimix Diver range across 8 centres in the TecDiveTools directory — roughly US$750 to US$5,650 at current exchange rates. In each centre's own currency: €995–€5,000 (3 centres), THB 60,000 (2 centres), $756–$2,400 (2 centres) and IDR 20,700,000 (1 centre). 1 centre charges 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 IANTD Trimix Diver take?

Between 4 and 8 days, based on the durations 6 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 IANTD Trimix Diver?

IANTD's standards require: Minimum 18 years old. Must hold one of: IANTD Technical Diver, Technical Cave Diver, Technical Wreck Diver, Normoxic Trimix Diver, or Normoxic Trimix Plus Diver (or equivalent). Proof of minimum 200 logged dives, with at least 25 dives to depths between 140 fsw (42 msw) and 200 fsw (60 msw).

What is the minimum age for IANTD Trimix Diver?

IANTD's standards state: Minimum 18 years old.

How many dives do I need before starting IANTD Trimix Diver?

IANTD's standards state: Proof of minimum 200 logged dives.

What is the equivalent of IANTD Trimix Diver in other agencies?

At the same tier in TecDiveTools' cross-agency comparison: TDI Advanced Trimix, PSAI Explorer Trimix, SSI XR Hypoxic Trimix, RAID Hypoxic Trimix and PADI TecRec Tec Trimix Diver. 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.

TDI Advanced TrimixPSAI Explorer TrimixSSI XR Hypoxic TrimixRAID Hypoxic TrimixPADI TecRec Tec Trimix Diver

Where can I take IANTD Trimix Diver?

13 dive centres and 23 instructors in the TecDiveTools directory teach IANTD Trimix Diver, in the United States, Mexico, Thailand and Indonesia. Each is listed further up this page.

Does the price of IANTD Trimix Diver include gas and equipment?

Not always — it varies by centre. Helium, 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.

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