To be safe, you must dive within the limits of your experience and level of training | The expansion or compression of enclosed air spaces may cause discomfort or injury while diving |
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There are several commercial products that can be used as an alternative to saliva, some of which are more effective and last longer, but there is a risk of getting the anti-fog agent in the eyes | By always providing the appropriate breathing gas at ambient pressure, demand valve regulators ensure the diver can inhale and exhale naturally and without excessive effort, regardless of depth, as and when needed |
Short quizzes let you gauge your progress, and review and correct anything you might happen to miss.
: 2 These standards include Commercial SCUBA Diver | Not all recreational divers have this training as some agencies do not include it in entry-level training |
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Miami Shores, Florida: International Association of Nitrox Divers | NASA Goddard Earth Sciences Data and Information Services |
Naval Submarine Medical Research Laboratory Technical Report 442.