Semi-Closed Rebreather Diver (Ray)
This is the Ray-specific version of TDI's semi-closed rebreather entry-level course. Students learn Ray unit mechanical operation, gas mixing considerations, and Ray-specific diving procedures. Entry rebreather certification providing extended bottom time and introducing rebreather technology before CCR progression.
Prerequisites
Minimum age 18; TDI Nitrox Diver or current enrollment (or equivalent).
Standards
What a diver must demonstrate to pass this course — not always published by the certifying agency.
Minimum dives and bottom time per TDI SCR standards for Ray unit. Maximum depth 40m/130ft, no decompression diving. Demonstrate Ray-specific mechanical operation, gas management, and emergency response.
Instructors Teaching This Course
Dive Centres Offering This Course
Philippines
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 Semi-Closed Rebreather Diver (Ray)
What are the prerequisites for TDI Semi-Closed Rebreather Diver (Ray)?
TDI's standards require: Minimum age 18; TDI Nitrox Diver or current enrollment (or equivalent).
What is the minimum age for TDI Semi-Closed Rebreather Diver (Ray)?
TDI's standards state: Minimum age 18.
How deep can you dive with TDI Semi-Closed Rebreather Diver (Ray)?
TDI's standards for TDI Semi-Closed Rebreather Diver (Ray) set a maximum depth of 40 m.
What does TDI Semi-Closed Rebreather Diver (Ray) training involve?
According to TDI's published standards: Minimum dives and bottom time per TDI SCR standards for Ray unit. Maximum depth 40m/130ft, no decompression diving. Demonstrate Ray-specific mechanical operation, gas management, and emergency response.
Where can I take TDI Semi-Closed Rebreather Diver (Ray)?
2 dive centres and 6 instructors in the TecDiveTools directory teach TDI Semi-Closed Rebreather Diver (Ray), in Egypt, Malta and the Philippines. Each is listed further up this page.