Cavern divers will swim away from the comfort of the open water under hard ceiling and potential hazards proper to cave and cavern environment. Direct and vertical ascent to the surface is now impossible and we must learn how to solve problems on the spot, or alternatively how to “isolate” it and take it safely back to the surface. This is a new way of thinking for open water divers usually performing no-stop dives. This means that divers must develop a high level of awareness in all field. Preparedness and mind-control become paramount in this kind of diving, and students will have to show a conservative mindset as much for their own safety as for protecting the integrity of the fragile cave / cavern environments. Cavern divers will lay line from the open water into the cavern area. Cave ceilings and bottoms are often covered with thin sediment that can lower visibility very quickly. Refined propulsion techniques and close to perfect buoyancy control and trim are now paramount to avoid silt-outs and disorientation. Divers at that level must know their equipment and it’s configuration to a much higher level as previously, in order to solve problems quickly and rationally, without losing any of the fundamental skills such as buoyancy, trim, position and orientation. Therefore, the training at basic level (Sidemount or Intro to Tech) must be of high level and of quality. As divers swim away from the open water, the psychological aspects are of much higher importance. Knowing one-self, couple with healthy non-egoic motivations and high level of preparedness are extremely important mind-skills and character traits of a good and safe Cavern diver. The TDI Cavern Diver course provides you with simple, efficient protocols and helps you develop clear mindset coupled with sound judgement in stressful situations.