Jack Up Barge (JUB) has completed a support and supply contract for the hook-up and commissioning of two offshore platforms at the Kriegers Flak offshore wind farm.The project involved several phases; the first is an AC Substation that will transfer power from the 600MW capacity Kriegers Flak wind farm onshore. The second platform is part of the so-called Combined Grid Solution (CGS); a joint project between Energinet and 50Hertz. Due to Krieger Flak’s close proximity to the German offshore wind farm Baltic 2, Energinet and 50Hertz intend to connect the two with two submarine cables. Representing the first time that the national power grids of two different countries have been connected, CGS will allow producers and consumers to combine and exchange power. For this project JUB mobilised its 55.5-metre long self-elevating jack-up vessel JB-115. JUB carried out modifications in order to make the vessel ‘project-ready’. They installed a second access gangway to provide personnel access to the nearest topside. Additional accommodation modules with twin-bed cabins, complete with own bathroom, Wi-Fi, TV and effective sound insulation were also installed meeting Danish standards.