A dredge vessel system

A dredge vessel for recovering materials from seabed and discharge said recovered materials into a barge, the dredge vessel comprising:

• a structure comprising a hull and a deck,
• a steering means and a motor for steering and moving the dredge vessel,
• a reel positioned on said deck,
• an elongated flexible suction hose adapted to be rolled onto the reel and unrolled down into the water,
• an inert rigid dredging head connected to a first end of the flexible suction hose and having a first free end opened downward for downwardly directing a suction, when resting on the seabed,
• a pump connected to the flexible suction hose for suctioning therethrough a mixture of said materials and water,
• a hoisting means disposed on said deck and having hanging ropes adapted to be wound and unwound and connected to both the rigid dredging head and a hanging rope length controller, for:
• moving the flexible suction hose and rigid dredging head between an inactive position located onboard the vessel and an active position located overboard,
• immersing and elevating the flexible suction hose and rigid dredging head,
• at least one delivering tube which is:
• connected at a first end to the flexible suction hose, and
• connected at a second end to a delivery head for discharging therethrough the recovered materials into said barge,
• said delivery tube and delivery head being adapted to move relative to said deck, such that the delivery tube and delivery head can be:
• stored above the deck in a stored orientation, and
• and deployed outside the dredge vessel in a orientation when said recovered materials have to be discharged of the ship, wherein
• the hoisting means is adapted for:
• towing the immersed flexible suction hose and rigid dredging head when the dredge vessel is moving forward and materials are being suctioned,
• while controlling a tilt of the rigid dredging head which has its first free end directed backward and resting on the seabed,
• a suction hose length controller for controlling the length of the flexible suction hose unrolled from the reel,
• a main length controller connected to both the flexible suction hose length controller and the hanging rope length controller for adjusting the unrolled length of the flexible suction hose and an unwound length of the hanging ropes in such a way that the flexible suction hose is curved along the determined length when the dredge vessel is moving forward and said materials are being sucked and whatever the tilt of the rigid dredging head, wherein the flexible suction hose has a determined length between the rigid dredging head and the sea surface.