'' Queen of the Netherlands '' is a Dutch Trailing suction hopper dredger ship constructed in 1998 . After lengthening in 2009 , she was the largest and most powerful dredger in the world . The vessel has been used in high-profile salvage and dredging operations including the investigation into the Swissair Flight 111 crash and in the Port Phillip Channel Deepening Project . It has been called " the world 's largest floating vacuum cleaner "
Swissair Flight 111
Swissair Flight 111
Queen of the Netherlands (ship)