In this video, Jonathan explains how Nitrox (oxygen-enriched air) extends the no decompression limit for divers over using plain old air, and why this gas has shallower maximum operating depths, making it a good "intermediate" breathing gas for scuba diving.

BLUE WORLD SCUBA 101 is a series of educational videos explaining equipment, technology and techniques of scuba diving. However it is for entertainment purposes only. Scuba 101 should not be considered a replacement or substitute for professional scuba training.

JONATHAN BIRD'S BLUE WORLD is an Emmy Award-winning underwater science/adventure series featuring underwater cinematographer/naturalist Jonathan Bird.

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