The course is designed to further develop skills from previous levels, to acquire new skills and gain a higher knowledge of safety procedures and techniques. The new techniques that are introduced are free-fall, Frenzel Equalizing, the use of training tables, the risks of increasing and decreasing pressure and also how to minimize these risks. Students will train these skills in the most common disciplines of freediving: Static Apnea, Dynamic Apnea, Free Immersion and Constant Weight.