This paper introduces the composition of a built-in three-cable positioning system and the configuration and function of the special components for the self-propelled cutter suction dredgers. This three-cable positioning system can work in the rough sea conditions without the limitation of the deck area for the self-propelled cutter suction dredger, and can reduce the impact on the resistance. It can significantly improve the operability and the economy of large self-propelled cutter suction dredgers.

The arrangement of bow anchor equipment for some large ships is very difficult because of the excessive equipment on the deck, the limitation of special bow lines and super-large bulb nose. Three different schemes of the anchor arrangement and their corresponding anchor bed are analyzed for large cutter suction dredgers to find the arrangement scheme and new anchor bed that are suitable for the bow lines and complex deck equipment. The finally adopted new anchor bed is different from the ordinary anchor bed, best using the current space to reach the optimum state of the reception and release of the anchor.