Altitude Acclimatization and Illness Management

The subject matter of this bulletin is hypobaric hypoxia, an environmental stress resulting from ascent to progressively higher terrestrial elevation or altitude. This bulletin defines the threshold altitude at which hypobaric hypoxia becomes functionally and medically significant at 1,200 meters (m) (3,937 feet (ft)) above sea level. Throughout this bulletin, the terms altitude, elevation, hypobaric hypoxia, or hypoxia are considered interchangeable. This bulletin provides guidance to mili...