How can you breathe using a snorkel while submerged under water ?
The two star diver may dive with a One Star Diver in sheltered shallow water . ” Three Star Diver - “ a fully trained , experienced , senior diver who is considered competent to supervise other divers of any grade in open water and support an instructor in pool and open water training . ” Four Star Diver - “ a three star diver who has attained a higher than average level of knowledge and ability supported by broad diving experience .