Deadman 3 : A substantial timer or plug of concrete buried in the earth to which a guy wire or line is attached for bracing a mast or tower. Also a land-side mooring device used with lines and cables when docking a vessel. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}