Dangerous Atmosphere 1 : An atmosphere that may expose employees to the risk of death, incapacitation, impairment of ability to self-rescue (i.e., escape unaided from a confined or enclosed space), injury, or acute illness
US Department of Labor, Occupational Safety & Health Administration, Shipyard Employment eTools - Glossary, Washington, DC, USA 2012. http://www.osha.gov/SLTC/etools/shipyard/glossary. html, (Shipyard Employment - Amer) {562}