Four J D Neuhaus type EH50 air operated monorail hoists have been supplied and mounted by Westcon Løfteteknikk AS of Bergen to the Maersk offshore rig Guardian. These products have been specified for the synchronized lifting and handling of an 18.3/4-inch 15,000 psi BOP unit before and after drilling operations. Two hoists are each mounted on twin parallel overhead rails, with each hoist providing 50 ton load and 20 metre lift capacities for between deck operations. Removable connector bars have also been supplied for fitting between paired hoists on the individual rails to maintain a fixed working distance of 4,060 mm between the load hook centers. With the two sets of hoists operating together, a combined lift capacity of 200 tons is made available. The minimum horizontal travel distance of the trolleys with the connector bars fitted is 14.81 metres. The maximum available free travel without the connector bars in place is 18 metres, with the travel distance limited by pneumatic end switches mounted on the hoist trolleys.