Ninian Central was constructed in Loch Kishorn in 1978 . At the time, the 600,000 tonne platform was the world’s largest man-made movable object.
Ninian Cental is a circular concrete gravity structure, 140 m in diameter at its base. It is based on seven concentric walls of stepped heights intersected by radial walls at 45-degree angles. .
At its centre is a 14 m wide central shaft surrounded by a 45 m diameter Jarlin Wall. This 1.6 m thick wall