Tag Archives: Scuba diving

Scuba Diving


Scuba Diving

Deep sea diving is generally performed with the aid of a breathing apparatus. Scuba (an acronym for Self-Contained Underwater Breathing Apparatus) is a system that delivers air to the diver at the same pressure exerted by the surrounding water. Most scuba divers limit their descent to about 130 ft (40 m), though certain record setters have reached depths of 300 ft (91 m) or more. At depths beyond 130 ft, nitrogen narcosis may set in; how does this condition impair a diver’s judgment? More… Discuss

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National Geographic: Sticky Octopus



A scuba diver is caught in the death grip of a Giant Pacific Octopus. DO OR DIE PREMIERES THU JAN 2 at 10P.

HIGH-ALTITUDE PILOTS SUBJECT TO BRAIN LESIONS


High-Altitude Pilots Subject to Brain Lesions

Decompression sickness, or “the bends,” is typically seen in scuba divers, but high-altitude pilots, who regularly fly at 64,000 feet and higher in planes that maintain a lower cabin pressure than typical commercial flights, are also at risk. Even those that escape decompression sickness are not unaffected by the repeated and prolonged exposure to a low-pressure environment. Researchers have found that high-altitude pilots have a higher incidence of brain lesions calledwhite matter hyperintensities than other military personnel. The pilots show no discernible cognitive impairments, but further study is needed to ascertain whether these lesions are harmful. More… Discuss