Tag, 'passport', or other system for identification and tracking of personnel at an incident, especially those entering and leaving an IDLH area; intended to permit rapid determination of who may be at risk or lost during sudden changes at the scene
Wikipedia, The Free Encyclopedia, Glossary of firefighting terms, Wikimedia Foundation, CA, USA 2012. http://en.wikipedia.org/wiki/Glossary_of_firefight ing_terms, (Fr Srvc - Amer) {510}