A coupling device for recovering an unmanned ship includes: a coupling unit, which is lifted and lowered by being connected to a crane provided in a mother ship; an accommodation unit provided in the unmanned ship, and having a vertically communicating coupling hole; a guide unit performing guiding such that the coupling unit is coupled to the accommodation unit, and including a towing line formed to be long, and a winch connected to the other side of the towing line so as to selectively wind or unwind the towing line; and a control unit including a sensing part for sensing the tension applied to the towing line by the driving of the winch, and a control part for lowering the coupling unit connected to the crane, if the intensity of the tension sensed by the sensing part is a preset value or higher.

An unmanned seismic vessel system can include a hull system configured to provide buoyancy and a storage apparatus configured for storing one or more seismic nodes, each seismic node having at least one seismic sensor configured to acquire seismic data. A deployment system can be configured for deploying the seismic nodes from the storage apparatus to the water column, where the seismic data are responsive to a seismic wavefield, with a controller configured to operate the deployment system so that the seismic nodes are automatically deployed in a seismic array.

An unmanned seismic vessel system can include a hull system configured to provide buoyancy and a storage apparatus configured for storing one or more seismic nodes, each seismic node having at least one seismic sensor configured to acquire seismic data. A deployment system can be configured for deploying the seismic nodes from the storage apparatus to the water column, where the seismic data are responsive to a seismic wavefield, with a controller configured to operate the deployment system so that the seismic nodes are automatically deployed in a seismic array.

A system, an arrangement and a method, all for motion damping of a floating marine structure. Also disclosed is a use of the system. The system has at least one dampening device configured to dampen a movement in one direction and allowing a movement in the opposite direction, and a suspension arrangement has a respective wire configured to suspend the at least one dampening device hanging at a suspended depth in the water from the marine structure and with the dampening device oriented so that a dampening force induced by the dampening device is subjected in the extension of the wire. Also, each dampening device is a passive damping device has a valve structure configured to dampen a movement in one direction and allowing a movement in the opposite direction essentially without damping interaction.

A hydrokinetic turbine system for harvesting energy from riverine and tidal sources, including a first floating dock, a marine hydrokinetic turbine mounted on the first floating dock, and a second floating dock. The system further includes a winch assembly mounted on the second floating dock and operationally connected to the first floating dock and a linkage assembly operationally connected to the first floating dock and to the second floating dock. The linkage assembly may be actuated to pull the first floating dock into contact with the second floating dock. The linkage assembly may be actuated to distance the first floating dock from the second floating dock, and the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is above the first floating dock and wherein the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is below the first floating dock.

A hydrokinetic turbine system for harvesting energy from riverine and tidal sources, including a first floating dock, a marine hydrokinetic turbine mounted on the first floating dock, and a second floating dock. The system further includes a winch assembly mounted on the second floating dock and operationally connected to the first floating dock and a linkage assembly operationally connected to the first floating dock and to the second floating dock. The linkage assembly may be actuated to pull the first floating dock into contact with the second floating dock. The linkage assembly may be actuated to distance the first floating dock from the second floating dock, and the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is above the first floating dock and wherein the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is below the first floating dock.

Methods and apparatus for monitoring windlass rotation are provided to determine the real time rate and length of rode release when anchoring a boat. The rotation can be monitored in real time using directional sound and/or electromagnetic radiation receivers and/or transmitter in a module attached to the windlass. Another windlass module can monitor windlass rotation using micro-electromechanical systems (MEMS) components such as accelerometers, magnetometers, gyroscopes, and/or inertial measurement units (IMU) to sense motion and/or position.

There is provided a self-restoring motion compensating mooring system for a floating unit. The mooring system includes a plurality of mooring anchors, a plurality of top fairleads attached near the top edges of the floating unit, a plurality of bottom fairleads attached near bottom edges of the floating unit, a stabilizer, a plurality of mooring cables passing through the respective top and bottom fairleads, connected between the plurality of mooring anchors and the stabilizer. Further, in respective equilibrium positions of the floating unit and the stabilizer, the center of gravity of the stabilizer is located directly below the center of gravity of the floating unit.

This document describes a system for the deployment, towing and recovery of marine equipment from a waterborne carrier, which carrier comprises a hoisting arrangement for lifting the marine equipment into the water. The system cooperates with the hoisting arrangement, and comprises a lateral deployment-recovery assembly for deployment and recovery on a lateral side of the carrier, and includes: a tow winch and an aft lateral outrigger connected to the carrier. The assembly also comprises a tow line guide and a guider winch including a guide line attachable to the tow line guide. The aft outrigger comprises a seat for the tow line guide and a sheave for the guide line to enable guiding of the tow line guide to the seat. The document also describes a method.

This document describes a system for the deployment, towing and recovery of marine equipment from a waterborne carrier, which carrier comprises a hoisting arrangement for lifting the marine equipment into the water. The system cooperates with the hoisting arrangement, and comprises a lateral deployment-recovery assembly for deployment and recovery on a lateral side of the carrier, and includes: a tow winch and an aft lateral outrigger connected to the carrier. The assembly also comprises a tow line guide and a guider winch including a guide line attachable to the tow line guide. The aft outrigger comprises a seat for the tow line guide and a sheave for the guide line to enable guiding of the tow line guide to the seat. The document also describes a method.