Advanced Courses in freediving are specifically designed to drive certified entry level freedivers to the next level. Many students are very happy remaining as RAID freedivers, using their newly acquired skills for pleasure, relaxation or even work. But, as with all sports there are those who like to progress - whether to test (or find) their limits or simply as motivation to maintain and improve their skills and techniques. Freediving is no different. Here's what you need to know