A technical diver handling decompression stage cylinders during a dive

Photo by Teemu Virtanen · CC BY-SA 3.0

OC TechRAID

Extended Decompression Instructor

Official course standards ↗Last updated September 7, 2026

A specialized course for RAID instructors seeking credentials to teach deep air-based technical diving to 55 metres in regions where trimix (helium) is unavailable or impractical. Instructor candidates learn to teach air-based deep diving using compressed air and up to three custom decompression gas cylinders for twinset and sidemount configurations. This course qualifies instructors to deliver advanced technical instruction in regions lacking trimix infrastructure, expanding technical diving accessibility and education.

Prerequisites

Current RAID Open Water Instructor certification. Documented technical diving experience teaching extended decompression techniques. Specific minimum dive counts and prerequisites are not publicly detailed on RAID's website. Contact a RAID centre for enrollment criteria.

Instructors Teaching This Course

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 RAID Extended Decompression Instructor

Where can I take RAID Extended Decompression Instructor?

1 dive centre and 1 instructor in the TecDiveTools directory teach RAID Extended Decompression Instructor, in Thailand. Each is listed further up this page.