Abstract: The invention relates to a device for dumping material onto an underwater bottom or installation, such as a pipeline. The device comprises a vessel, provided with a fall pipe through which the material is dumped on the underwater bottom; a steering device adapted to control the motion of the fall pipe relative to the underwater bottom; first monitoring means adapted to monitor the state of the underwater bottom; second monitoring means adapted to monitor the position of the steering device; and computing means adapted to compute, control signals for moving the steering device. The invention also relates to a method for dumping material onto an underwater bottom or installation.

Abstract: A device for spreading aggregate material from a discharge conveyor onto a work surface includes a tremie attached relative to the discharge conveyor and a flexible hose connected to the tremie. A crank connected between the tremie and the discharge conveyor permits adjustment of a frequency and an amplitude of the tremie to provide a desired windrow of material on the surface. A distal end of the discharge conveyor is preferably moveable relative to a supply of material to further optimize the desired windrow of material.

Abstract: A self-loading, self-discharging, bulk cargo transhipper 20 comprising a buoyant vessel 21 capable of receiving water as ballast inside the buoyant vessel 21, a bulk material receiving system 22, a bulk material distribution system 25 and a bulk material holding system 28, which transhipper 20 is a deep sea transhipper for the transfer of bulk cargo between vessels or between a port without deep draft loading facilities and a vessel at sea. The invention also relates to method of material transfer between vessels at sea or between a port without deep draft loading facilities and a vessel at sea.