How can you breathe using a snorkel while submerged under water ?
The 3 star snorkel diver has acquired life saving skills and can lead snorkel divers in open water dives . ” Introductory SCUBA Experience - “ this training programme aims at providing interested persons with an introductory SCUBA diving experience , to a maximum depth of ten ( 10 ) metres under the direct supervision of a CMAS Instructor , whilst using air as a breathing gas , in a safe manner . ” One Star Diver - “ a diver who is competent in the safe and correct use of all appropriate open water scuba diving equipment in a sheltered water training area and is ready to gain open water diving experience in the company of an experienced diver . ” Two Star Diver - “ a diver who has gained some open water diving experience and is considered ready to take part in dives partnered by a diver of at least the same or a higher grade .