Cavern Course


This course is designed to develop the minimum skills and knowledge for cavern and overhead environment diving within the limits of light penetration; in addition outlines specific hazards associated with cave diving. The cavern diver course in not intended to provide instruction for cave diving environments. The objective of this course is to train divers in the proper planning, procedures, techniques and hazards of cavern diving. 


 Qualifications of Graduates 

Upon successful completion of this course, graduates may engage in cavern diving activities without direct 

supervision provided the graduates adhere to the following limits: 

1. Daylight zone, i.e. within natural light of the cavern entrance 

2. Penetration is limited to 1/3 of a single diving cylinder or 1/6th if using double cylinders 

3. 61 linear metres / 200 linear feet from the surface 

4. 40 metres / 130 feet maximum depth 

5. No decompression diving 

6. No restrictions; no areas too small for 2 divers to pass side-by-side 

7. Safety stops as appropriate or necessary 

8. Maintain a continuous guideline 

9. Proper cavern diving equipment is used 

10. No removal of life support equipment shall be permitted within the overhead environment 

Upon successful completion of this course, graduates are qualified to enroll in: 

1. TDI Introductory Cave course 

 Required Equipment:

The following equipment is required for each student: 

1. Primary cylinder, volume appropriate for planned dive and student gas consumption; students are 
permitted to use double cylinders, but would be limited to the 1/6 air rule 

2. Regulator with pressure gauge and alternate air source; although not required, it is suggested one regulator be mounted on a hose approximately 2 metros / 7 feet in length

 3. Buoyancy compensator device (BCD) with power inflator, CO2 device rendered inoperative

 4. Exposure suit adequate for cavern environment 

5. Mask and fins, NO snorkel 

6. Line cutting device 

7. Safety reel with a minimum of 37 metros / 125 feet of guideline 

8. One primary cavern-diving reel with length appropriate for intended dive 

9. Two battery powered lights, each with burn time suitable for the planned dive time 

10. Computer or watch (bottom timer) and depth gauge 

11. Slate or wet notes and pencil 

12. Submersible dive tables or backup dive computer (recommended) 

13. Three directional line arrows 

14. Weight system 

Student Prerequisites:

1. Minimum age 18, 15 with parental consent 

2. Provide proof of an SDI Open Water Scuba Diver or equivalent 

3. Provide proof of a minimum of 25 dives 

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