The course of Specialty ESA Cavern Diver intends to furnish the useful formation to the recreational scuba diver to explore in safety the hollow it submerged that they respect the anticipated limits for the recreational underwater activity and in presence of environment conditions similar to those met during the formative phase. The program is typically mainly concentrate on the development of the awareness towards the tied up dangers to the practice of the dives in cavern with the objective to improve the attitude to the prevention and the abilities of management of the emergencies. Through the study and the practical experience, under the guide of an Instructor qualified ESA, the participant receives the theoretical information and learns the techniques to explore the hollow submerged within the anticipated limits in safety and in the maximum respect of the environment. The course foresees the study of the manual of Specialty ESA Cavern Diver, the elaboration of the information from the instructor and the Open Waters dives. The course will not prepare to the practice of the "underwater speleologists" but to the exploration of the "caverns" scuba divers (or parts of submerged hollow) from which is possible to always see the natural light coming from the entry / exit within the limits of the recreational underwater activity and in safety curve. Also keeping in mind of the least finishing lines that obligatorily the participant owes to reach, the program has been set so that to go toward the more possible to the demands of the participants in terms of time, formality of learning and possible repetition of the different formative phases. The instructor ESA has the faculty to model the program, in the respect of the pre-arranged norms, suiting it for the possible demands of logistic character of the people and the involved structures. The course is delineated, so that to guarantee that every participant receives a certification that attests the phases share formative precise and equal for everybody. For the approach, the techniques and the awareness required by the practice of the exploration of submerged hollow, the course of Specialty ESA Cavern Diver is an important formative wedge for those people who intend to pursue the professional career and to get the qualifications ESA Diveleader and ESA Instructor.