title: Sleep, mood, and fatigue during a 14-day He-O2 open-sea saturation dive to 850 fsw with excursions to 950 fsw.
abstract: To obtain information on sleep, mood, and performance of divers and surface support personnel during deep dives in the open sea, 12 divers and 12 surface support personnel were monitored during a 14-day open-sea saturation dive using the U.S. Navy Deep Diving System, Mark 2, Mod O. Divers lived in the deck decompression chambers at 850 fsw equivalent and made 5 days of excursion wet dives to approximately 950 fsw via the Personnel Transfer Capsule. Electroencephalographic and self-report measures of sleep, and measures of mood, anxiety, and 4-choice reaction time performance were obtained during a predive base-line period and throughout the dive and decompression. Results suggested that, unless personnel are rotated, there are limitations to the practical duration of very deep open-sea saturation dives caused by the accumulation of sleep debt, fatigue, and loss of psychological vigor.
mesh_terms: D000339:Affect / Q000502:physiology*; D004242:Diving; D004569:Electroencephalography; D005221:Fatigue / Q000503:physiopathology*; D006371:Helium; D006801:Humans; D008297:Male; D010100:Oxygen; D011930:Reaction Time; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation
chemical_list: D006371:Helium; D010100:Oxygen