Intermediate Columns : Vertical, cylindrical or multifaceted buoyancy members of the hull structure, which primarily assist in deck and/or pontoon support. (RP 2T)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}