Carabiner 2 : A device utilized extensively by high/low angle rescue teams. It is usually a "D" shaped type of metal link that opens on one side to insert rope or webbing
United States Search and Rescue Task Force, Search & Rescue and Disaster Glossary and Acronyms, Pennsylvania, USA 2014. http://www.ussartf.org/glossary_acronyms.htm, (Dzstr/SAR - Amer) {803}