Vigilance 1 : Having to pay attention or concentrate for long periods of time. This state of sustained alertness or vigilance is required in some jobs such as driving or flying and is especially demanding mentally
Association of Canadian Ergonomists/ Association Canadienne d'Ergonomie (ACE), Ergonomics Glossary, NW, Canada 2014. http://www.ace-ergocanada.ca/index.php?contentid=2 45, (Ergo - Amer) {740}
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}