The Celtic Array was a proposed UK round 3 offshore wind farm in the Irish Sea south east of the Isle of Man.The wind farm zone was awarded to Centrica for development in 2012, and in 2012 Centrica formed a joint venture with Dong Energy to develop the zone; a "zone appraisal report" published in 2012 split the area into 3 development zones, with large scale gaps between, primarily to prevent disruption to shipping; the three development zones were estimated to have a total capacity of between 2.9 to 5.4 GW.