Independent course guide · References checked 30 September 2026. Confirm current standards and your eligibility with an authorised instructor.
Where this course fits
A qualifying recreational certification and experience are required; confirm current age, equipment and local requirements.
Ask how the daylight zone, distance and other course boundaries are taught and assessed at the training site.
TDI Cavern Diver: learning scope
Entry & preparation
A qualifying recreational certification and experience are required; confirm current age, equipment and local requirements.
What you study
Learn an introduction to overhead diving within the specific boundaries of cavern training.
- Guideline awareness
- Propulsion and visibility protection
- Overhead planning and emergency skills
Qualification boundary
Cavern training does not permit unrestricted cave penetration or entry beyond its defined limits.
A visual summary of this independent course guide. Confirm current prerequisites and standards with the agency and instructor.
What the training focuses on
| Learning area | Discuss before booking |
|---|---|
| Guideline awareness | How will this be taught and assessed? |
| Propulsion and visibility protection | What preparation and equipment should I bring? |
| Overhead planning and emergency skills | What happens if I need more practice? |
Understand the qualification’s scope
Cavern training does not permit unrestricted cave penetration or entry beyond its defined limits.
Frequently asked questions
Is Cavern the same as Cave Diver?
No. They have different scopes. Cavern is a restricted introduction.
Can I follow a cave diver beyond my limit?
No. A more qualified buddy does not extend your qualification.
Does clear water make an overhead safe for a beginner?
No. Visibility can change and direct ascent is still unavailable.
What should an Australian course quote include?
Ask for an itemised total covering learning materials, practical sessions, certification, equipment, boat or site fees and any extra training. Availability, duration and prices are centre-specific.
Where do I confirm the latest prerequisites?
Use the official TDI information linked below and ask the authorised instructor to check your certification, age, experience, medical and first-aid records. A similar course name from another agency is not automatic equivalence.
Official course information
TDI: Cavern Diver ↗Agency standards determine certification requirements. This guide does not reproduce the full standard or imply agency endorsement.
Related next steps
Check prerequisites and readiness before choosing another course.