TDI Full Cave Diver

This course is the 3rd level of training in the TDI’s Cave Diver development program. At this level, student divers are introduced to advanced cave diving planning and execution in different types of cave diving scenarios divers may encounter.


To find out what it takes to become a TDI Full Cave Diver, please visit the link:

What Does it take to become a Full Cave Diver?


The goal of this course is to expand previous skills learned in the TDI Cavern Diver and Intro to Cave Diving programs. Emphasis on dive planning and skill perfection through actual complex navigation dives and cave penetration.




SKU: TDI Full Cave Diver Categories: , Product ID: 2144


What is the TDI Full Cave Diver Course?

The Full Cave Diver course is for divers interested in continuing with their education in overhead environments diving, expanding their diving techniques and capabilities. It is the third course of the series where divers learn to deal with complicated navigation dives, restrictions, and fine-tune all the previously acquired skills.

Why is Divers UnderGround the best TDI dive center to do your Cave Diver course?

At Divers UnderGround we believe that Cave Diving, and Technical Diving in general, is a sport that has to be taken seriously. Sure, it is fun and is very enjoyable but we have to remember, we are getting into one of human’s most inhospitable places on earth. We need to foresee and be prepared to deal with any situation we may encounter, and even more, we need to learn how to avoid getting into dangerous situations.

Once you are a certified cave diver, you will be ready to go cave diving without the supervision of an instructor. However, is not the certification card that keeps you safe, is your ability to plan and execute safe cave dives appropriately and we make sure you are ready to do just that when we sign that certification card. During training, you will encounter almost all possible scenarios, and we treat them as the worst case. By training in this way, divers are prepared to confront any situation in the cave with the confidence necessary to always come out of the dives unhurt.

Course structure:

Water Execution:

The course requires eight Cave Dives at three different sites and at least six different caves

For divers entering the program without Cavern Diver and Intro to Cave certifications, the requierment is 16 dives


The course must be taught in no less than 5 days.

When combined with Cavern and Intro to Cave a minimum  of eight days are required.

Qualifications of graduates:

Progressive cave penetration using the rule of thirds conservatively

A maximum diving depth of 40 Metres / 130 feet

No removal of equipment in the cave

Proper guideline following procedures

Adequate use of cave diving gear

Cave Dives must be within the no-decompression limits unless adequately trained.

Complex navigation dives planning and execution.

Course Prerequisites:

Minimum age 18.

Certified as TDI Intro to Cave or equivalent.

TDI Full Cave Diver Course
Photo: Camilo Garcia - Diver: Gin Tong
Razor Sidemount Cave Instructor
Photo: Robert Standsfield - Diver: Geraldine Solignac

What am I trained to do as a Full Cave Diver?

After completing this course, divers may plan and execute dives without supervision, adhering to the following limits:

Diving activities are approximate to those of training

Plan dives according to your level of comfort and training

Execute cave dives using the rule of thirds conservatively

Cave diving within a maximum depth of 40 meters / 130 feet unless properly trained to go deeper

Always maintain a continuous guideline

Use proper Cave Diving equipment

Some of the skills you will learn and/or practice during the course include:

Aduquate reel work and line deployment.

Use of directional and non-directional line markers

Follow the cave line simulating visibility loss

Share gas while following the permanent system line

Air sharing without lights using touch contact communication and following the exiting line

Replace mask while keeping contact with the guideline

Conservation, awareness and referencing techniques

Light/hand signals and touch contact communication

Anti-silting and propulsion techniques

Primary light failure simulation and proper deployment of backup lights  to exit the cave

Lost diver protocols and line recovery procedures

Adequate use of spools and reels to perform jumps and gaps

Perfect buoyancy control and trim

Proper stress analysis (detection and management)

Gear matching

Adequate pre-dive planning

Awareness and respect for the environment