Personal Alert Safety System (PASS) 3 : Means a device that sounds a loud signal if the wearer becomes immobilized or is motionless for 30 seconds or more
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}