A mooring system has a pre-existing subsea foundation at a first seabed location and a catenary mooring line connected to the pre-existing foundation and extending to a moored floating unit. A supplementary subsea foundation is installed at a second seabed location to upgrade the capacity of the mooring system. The mooring line is connected to the supplementary subsea foundation while the connection between the mooring line and the pre-existing subsea foundation is maintained.

A mooring system has a pre-existing subsea foundation at a first seabed location and a catenary mooring line connected to the pre-existing foundation and extending to a moored floating unit. A supplementary subsea foundation is installed at a second seabed location to upgrade the capacity of the mooring system. The mooring line is connected to the supplementary subsea foundation while the connection between the mooring line and the pre-existing subsea foundation is maintained.

A raft anchoring assembly for anchoring a raft in a swimming pool includes a raft for floating in a swimming pool. A plurality of anchors is included and each of the anchors includes a line is coupled to a suction cup. The suction cup on each of the anchors engages a floor or a wall of a swimming pool to secure the anchors. A plurality of attachments is provided and each of the attachments is coupled to the outer surface of the raft. The line of each of the anchors is releasably coupled to a respective one of the attachments to inhibit the raft from drifting in the pool.

A rotatable chain stopper includes a base, an actuator operatively coupled to the base, and a pair of latches pivotably coupled to the base. The orientation of the base and position of the latches are responsive to extension of the actuator. The rotatable chain stopper may be used as a portion of chain jack assembly, such as on an offshore vessel. The rotatable chain stopper may used in a method of pulling-in, paying-out, and positioning of an anchor chain, such as for mooring an offshore vessel.

A rotatable chain stopper includes a base, an actuator operatively coupled to the base, and a pair of latches pivotably coupled to the base. The orientation of the base and position of the latches are responsive to extension of the actuator. The rotatable chain stopper may be used as a portion of chain jack assembly, such as on an offshore vessel. The rotatable chain stopper may used in a method of pulling-in, paying-out, and positioning of an anchor chain, such as for mooring an offshore vessel.

Disclosed is a structure such as a floating structure, including at least one fairlead for guiding an anchoring element thereof at an anchoring point, the fairlead including a guide to guide the anchoring element in translation between the structure and the anchoring point, a unit for moving the anchoring element in translation in the guide in order to place the anchoring element under tension, and a lock to prevent the anchoring element from moving in translation in the guide, for mooring the structure to the anchoring point. The unit for moving the anchoring element in translation in the guide is integrated into a distinct part separate from the rest of the structure of the fairlead, and this part and the rest of the structure of the fairlead include the retractable coupling unit thereof.

Disclosed is a structure such as a floating structure, including at least one fairlead for guiding an anchoring element thereof at an anchoring point, the fairlead including a guide to guide the anchoring element in translation between the structure and the anchoring point, a unit for moving the anchoring element in translation in the guide in order to place the anchoring element under tension, and a lock to prevent the anchoring element from moving in translation in the guide, for mooring the structure to the anchoring point. The unit for moving the anchoring element in translation in the guide is integrated into a distinct part separate from the rest of the structure of the fairlead, and this part and the rest of the structure of the fairlead include the retractable coupling unit thereof.

Disclosed is a fairlead for guiding an anchoring element of an offshore structure, such as a floating structure, at an anchoring point, of the type having a guide for the anchoring element and a lock holding the anchoring element in position, having a locking jaw including two locking jaw elements that are movable by a maneuvering unit actuated by a controller, between a closed position preventing the anchoring element from moving in translation and an open position releasing the anchoring element. The controller is of the impulse-type, and the maneuvering unit includes a pawl that defines successive stable open and closed positions of the jaw-forming unit.

Disclosed is a fairlead for guiding an anchoring element of an offshore structure, such as a floating structure, at an anchoring point, of the type having a guide for the anchoring element and a lock holding the anchoring element in position, having a locking jaw including two locking jaw elements that are movable by a maneuvering unit actuated by a controller, between a closed position preventing the anchoring element from moving in translation and an open position releasing the anchoring element. The controller is of the impulse-type, and the maneuvering unit includes a pawl that defines successive stable open and closed positions of the jaw-forming unit.

Disclosed is a fairlead intended to engage with an anchor chain, for a system for anchoring a floating installation to the ground. The fairlead includes two structures assembled by pivot connection of axis, one upstream, for rigidly connecting the fairlead to the floating installation, and the other downstream, includinga unit for blocking the translational movement of the anchor chain, anda guide, for guiding a change in direction of the anchor chain. Furthermore, the downstream structure includes two lateral plates delimiting the passage of the chain, the upstream end of each of the plates including a U-shaped bearing receiving an additional arm of the upstream structure and engaging together via a journal, the guide extending between the internal branches of the two bearings.