Abstract: Scavenging apparatus for embedding cables or the like into the soil of waters, comprising an elongated scavenging sword being adapted to be attached at different heights to an embedding vessel movable on the soil of waters or to a surface water vessel, the sword having a guide channel extending through the sword from the top to the bottom in the rear area thereof for the guidance of the cable and its depositing on the bottom of the trench scavenged free, the sword further including a water channel extending through from the top to the bottom in the front region thereof and connected to a pressurized water supply at the upper end and to a set of scavenging nozzles located at the front side of the scavenging sword, and a vibrator for the scavenging sword, the vibrator being connected to an energy source located on the vessels by energy supply lines, with the vibrator being located with the scavenging sword near the sole of the sword and the energy supply lines for the vibrator extend inside the sword.

Abstract: A method for introducing and moving a rope- or cable-like element in and through a cable channel pipe filled with water wherein a flow of water is pumped through the cable channel pipe, and the element is floated through the cable channel pipe jointly with the water flow.

Abstract: A method for progressively producing an underwater laying-out channel (3) for an object (53) to be laid out, like a cable or the like, in an underwater ground by flushing and by mechanically loosening ground formations (7) which are resistive against flushing, by means of a mechanical loosening device (31) having a given maximum working depth, characterized by lowering the mechanical loosening device (31) to the ground formation (7) which is resistive against flushing, and advancing, in an advancing direction, the mechanical loosening device through the ground formation which is resistive against flushing, with the working depth being effective from the surface of that ground formation.

Abstract: A method for progressively producing an underwater laying-out channel (3) for an object (53) to be laid out, like a cable or the like, in an underwater ground by flushing and by mechanically loosening ground formations (7) which are resistive against flushing, by means of a mechanical loosening device (31) having a given maximum working depth, characterized by lowering the mechanical loosening device (31) to the ground formation (7) which is resistive against flushing, and advancing, in an advancing direction, the mechanical loosening device through the ground information which is resistive against flushing, with the working depth being effective from the surface of that ground formation.

Abstract: A cable or the like is embedded into an underwater ground by introducing the cable into a zone of reduced density which is produced progressively in the ground by a flushing process; upon meeting with ground formations which are only insufficiently loosened by the flushing process, mechanical loosening tools assist the loosening action of the flushing process. Preferably, the mechanical loosening tools are automatically put into and out of operation in dependence upon the depth of penetration of the flushing process.