The largest grab dredger bucket weighs 477 tons (1,051,604.99 lbs) and was manufactured by Mitsubishi Nagasaki Machinery MFG. CO. LTD. (Japan). It was presented and measured in Nagasaki, Japan, on 16 March 2011.

The dredger is 10.057 m (32 ft 11 in) tall, 12.731 m (41 ft 9 in) wide and 5.526 m (18 ft 1 in) deep.