Two sludge suction machines shall be delivered on the hook lift frame and with an option for a further 2 additional units. The objective of the sludge suction system is to cover the contracting authority ́s need to drain seabed water while the Norwegian Armed Forces vessels are quaying. This shall be a sludge suction on a hook lift frame, where the Assignment ́s vehicle (hook lifts) carries the equipment on its way between the quay and the tank facility for emptying.