In a shallow water anchor of a parallelogram design which lowers a rod down from a fishing boat into contact with the ground to keep a boat from drifting out of a chosen location, a depth the rod can reach depending on the combined extended length of the unfolded parallelogram and the length of the vertical rod, a first improvement to increase the maximal depth without concomitantly increasing the length of the parallelogram frame, the improvement using the relative motion and geometry of parallelogram parts to lengthen a telescoping rod, and a second improvement of a flexible coupling to an electric drive motor.

In a shallow water anchor of a parallelogram design which lowers a rod down from a fishing boat into contact with the ground to keep a boat from drifting out of a chosen location, a depth the rod can reach depending on the combined extended length of the unfolded parallelogram and the length of the vertical rod, a first improvement to increase the maximal depth without concomitantly increasing the length of the parallelogram frame, the improvement using the relative motion and geometry of parallelogram parts to lengthen a telescoping rod, and a second improvement of a flexible coupling to an electric drive motor.

A method is presented for simulating marine assets (MA) in an offshore operation. The marine assets comprise at least an anchor, a line coupling the anchor with a winch, and a support platform located offshore for supporting the winch. The method involves a computation stage for estimating a state of the marine assets using a computational model and received sensor data (Ds) pertaining to a state of the marine assets and/or of an environment (ME) wherein the marine assets are used. The computational model of the marine assets (MA) includes at least a specification of an anchor, a specification of a winch and a specification of a line coupling the anchor with the winch. The at least a line is modeled as a first portion extending between the winch and a touch-down point where the line touches the seabed and a second portion extending between the touch-down point and the anchor. Additionally a simulation system is presented for simulating the marine asset, and an arrangement including the marine asset and the simulation system.

A rotary chain jack may include a frame, a dual chain wheel rotatably coupled to the frame, and a stopper assembly mechanically coupled to the frame. The stopper assembly may include latches. The stopper assembly may be positioned to selectively engage a chain passing over the dual chain wheel. The rotary chain jack may be used to moor offshore structures.

A rotary chain jack may include a frame, a dual chain wheel rotatably coupled to the frame, and a stopper assembly mechanically coupled to the frame. The stopper assembly may include latches. The stopper assembly may be positioned to selectively engage a chain passing over the dual chain wheel. The rotary chain jack may be used to moor offshore structures.

A mooring system comprising: a ballast platform; and a chain comprising a plurality of links that are pivotally connected to each other via parallel pivot pins such that the chain is configured to not rotate about a vertical axis that is orthogonal to axes of rotation of the pivot pins, wherein the chain has proximal and distal ends, and wherein the proximal end is attached to a top of the ballast platform and the distal end is configured to be attached to a buoyant object.

Disclosed is a chain tensioner for employment on a bottom of a water body, wherein the chain tensioner is configured for adjustment of the length of a tensioning chain that extends between the chain tensioner and a floating offshore facility, wherein the chain tensioner includes a chain lock for engaging and confining a link of the tensioning chain in the chain passage from aside the tensioning chain, and a chain switch device having a chain guide for engaging the tensioning chain in the chain passage from aside the tensioning chain, wherein the chain guide is moveable between a first position in which the chain lock engages a link of the tensioning chain, and a second position in which the tensioning chain passes the chain lock.

An anchor roller incudes side walls to allow an anchor to be stored therein. Openings are provided in the side walls to allow the anchor line to pass there through to allow tying to a cleat.

An anchor roller incudes side walls to allow an anchor to be stored therein. Openings are provided in the side walls to allow the anchor line to pass there through to allow tying to a cleat.

A dual axes connection device for use with a mooring line, a line guide and pulling means for connecting a floating body and a fixed body is provided. The connecting device comprises a dual axes hinge unit, with orthogonal rotational axes x and y, comprising means for fastening the unit to the floating or fixed body, a connecting link fastened to the hinge unit comprising two parallel arms, a funnel connected to the two parallel arms enveloping the mooring line, and locking means for locking the mooring line to the funnel. The mooring line, the line guide and connection device are positioned in one plane.