Outriggers 2 : Structural extensions of the mast or pole base protruding at approximately 90 degrees from the longitudinal axis of the rig to provide overturn stability. (RP 54)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}