Mobile Offshore Drilling Unit (MODU) model (scale 1:240) 'Staflo' semi submersible, stucture: rectangular platform 264 feet long x 220 feet beam, 113 feet height, 20 colums, by Furness Shipbuilding (No. 523), Haverton, Hill-on-Tees, England (1967); rig: derrick by Lee C. Moore, USA; drawworks, electric rotary drive and mud-pumps by National, USA, blow-out preventer (BOP) stack by Cameron, USA, for Shell UK Exploration and Production. Mobile Offshore Drilling Unit (MODU) model (scale 1:240) 'Staflo' semi submersible 1967