The platform was constructed by McDermott Engineering of Ardersier and Union Industrielle d'Entreprise of Cherbourg, with the sections united at Ardersier before tow out during 1975, with production commencing in late 1976. For safety reasons the modules were organised so that the most dangerous platform operations took place far from the personnel areas. The conversion from oil to gas broke this safety concept, with the result that sensitive areas were brought together; for example, the gas compression was next to the control room. The close position of these two areas played a role in the accident.