TDI Rebreather Intro to Cave Diver


This course is an introduction to the basic principles of rebreather cave diving utilizing a single primary guide line. The TDI Rebreather Intro to Cave is the second level in the development of safe techniques for rebreather cave diving, directly building upon the TDI Rebreather Cavern Diver course. This introduction to cave diving is not intended to train divers for all facets of rebreather cave diving. The objective of this course is the perfection of skills taught in the TDI Rebreather Cavern Diver program, in addition to the adoption of additional techniques and procedures required for elementary rebreather cave dives.



Class Duration:  

1. The minimum number of classroom and briefing hours is 4 

2. Course must be taught over a minimum of 2 days



Course Structure

Water Execution 

1. One open water evaluation dive must be conducted if students are new to the instructor or a period of 6 months has passed since their

    last cavern dive. 

2. Minimum of 4 single guideline cave dives with a total bottom time of 160 minutes conducted at 2 different sites 

3. Only 2 dives from the TDI Introductory Rebreather Cave Diver course may be credited towards the total dives required for TDI CCR Air

    Diluent Decompression Procedures course



Student Prerequisites

1. Minimum age 18 

2. Minimum certification requirement; TDI CCR Air Diluent Diver or equivalent 

3. Provide proof of certification as a: 

    a. TDI Rebreather Cavern Diver or equivalent

    b. TDI Introductory Cave Diver or equivalent 

4. Provide proof of a minimum of 50 logged dives and 30 hours on the rebreather unit used



Required Equipment:  

The following equipment is required for this course:

1. A complete TDI approved Rebreather

2. Minimum of 1 rebreather enabled computer or PO₂ monitoring device 

3. Off board bailout cylinder(s) – volume appropriate for planned dive 

4. Bailout regulator(s) equipped with pressure gauge and low pressure off
board (quick connect) gas supply hose 

5. Buoyancy compensator device (BCD) with power inflator
6. Exposure suit adequate for diving environment
7. Access to an oxygen analyzer (instructor may supply)
8. Mask and fins
9. Minimum of 2 cutting devices
10. Slate and pencil
11. Three battery powered lights; 1 primary and 2 back-ups, each with a with
burn time suitable for the planned dive time
12. Safety reel with a minimum of 37 metres / 125 feet of guideline
13. One primary cave-diving reel with length appropriate for intended dive
14. Computer, watch or bottom timer and depth gauge
15. Slate or wet notes with a pencil
16. Submersible dive tables or backup dive computer
17. Three directional line arrows

Note: The instructor and any certified assistant will also carry a bailout gas supply during all open water sessions. This redundant gas source must be greater than the instructor and any certified assistant’s bailout requirements.

Total  Cost: Call For Pricing

Rental of a rebreather is available upon request.

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