Monitoring Army radio-communications networks at high altitude.
D000337:Aerospace Medicine; D000531:Altitude; D001273:Atmosphere Exposure Chambers; D001288:Attention; D001307:Auditory Perception; D003142:Communication; D006801:Humans; D008297:Male; D009042:Motivation; D011845:Radio; D011930:Reaction Time; D013312:Stress, Physiological