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 chain mooring windlass may include a frame, a wheel, and an axel extending through the wheel and rotatably coupled to the frame. Drive assemblies may be coupled to the axel via a first stage gear reduction including reduction gears. The axel may be coupled to the wheel via a second stage gear reduction including reduction gears. A movable drive mechanism may include reduction gears, and drive assemblies coupled to the reduction gears. The drive assemblies may drive the reduction gears. A drive gear may be coupled to the reduction gears. The reduction gears may drive the drive gear. The drive gear may be configured to couple to a chain wheel of a chain mooring windlass to drive the chain wheel. A chain wheel coupler may be configured to selectively couple the movable drive mechanism to a chain wheel of a chain mooring windlass.

A chain mooring windlass may include a frame, a wheel, and an axel extending through the wheel and rotatably coupled to the frame. Drive assemblies may be coupled to the axel via a first stage gear reduction including reduction gears. The axel may be coupled to the wheel via a second stage gear reduction including reduction gears. A movable drive mechanism may include reduction gears, and drive assemblies coupled to the reduction gears. The drive assemblies may drive the reduction gears. A drive gear may be coupled to the reduction gears. The reduction gears may drive the drive gear. The drive gear may be configured to couple to a chain wheel of a chain mooring windlass to drive the chain wheel. A chain wheel coupler may be configured to selectively couple the movable drive mechanism to a chain wheel of a chain mooring windlass.

A windlass assembly for a marine craft anchoring system is disclosed. The assembly comprises, before attachment to the craft, a windlass portion and a bow roller portion connected to each other via a connection portion. The connection portion provides a mechanical link between the windlass portion and the bow roller portion, secures alignment between the windlass portion and the bow roller portion and fixes the spacing between the windlass portion and the bow roller portion.

A windlass assembly for a marine craft anchoring system is disclosed. The assembly comprises, before attachment to the craft, a windlass portion and a bow roller portion connected to each other via a connection portion. The connection portion provides a mechanical link between the windlass portion and the bow roller portion, secures alignment between the windlass portion and the bow roller portion and fixes the spacing between the windlass portion and the bow roller portion.

A gypsy is disclosed, adapted for mounting in a windlass for hauling and/or veering anchor rode. A chain-engagement region (12) of the gypsy comprises chain link pockets (18) sized and spaced around the chain-engagement region to engage with chain of the anchor rode. A line-engagement region (24) is provided, with an array of rope grip features (26) spaced around the line-engagement region. The chain-engagement region of the gypsy is formed from a polymeric material and the line-engagement region is formed from a metal material.

A gypsy is disclosed, adapted for mounting in a windlass for hauling and/or veering anchor rode. A chain-engagement region (12) of the gypsy comprises chain link pockets (18) sized and spaced around the chain-engagement region to engage with chain of the anchor rode. A line-engagement region (24) is provided, with an array of rope grip features (26) spaced around the line-engagement region. The chain-engagement region of the gypsy is formed from a polymeric material and the line-engagement region is formed from a metal material.

A chain and cable handling winch system comprising of a winch, the winch having a winch axle, the winch axle having a winch axle end adapted to mount a chain wheel thereon in a working position a cable drum mounted on the winch axle a frame, supporting the winch axle such that the winch axle is supported on opposite sides of the cable drum by a first and second support, the first support being located inbetween the cable drum and the chain wheel end of the winch axle; and a motor drive adapted to drive the winch a chain wheel, the chain wheel having a chain wheel body with a central opening adapted to engage the chain wheel end of the winch axle, the chain wheel being in a working position when mounted on the chain wheel end of the winch axle a chain wheel lock assembly, wherein the assembly is adapted to releasably secure the chain wheel in the working position on the chain wheel end of the winch axle, the chain wheel lock assembly comprising one or more locking members movable between a locking position and an unlocking position; and a chain wheel manipulator adapted to the exchange the chain wheel mounted on the chain wheel end of the winch axle for another chain wheel, the chain wheel manipulator having a chain wheel support adapted to support a chain wheel, the chain wheel support being positionable in a chain wheel exchange position adjacent to the chain wheel end of the winch axle to mount a chain wheel onto the winch axle end and to dismount the chain wheel from the winch axle end.

A chain and cable handling winch system comprising of a winch, the winch having a winch axle, the winch axle having a winch axle end adapted to mount a chain wheel thereon in a working position a cable drum mounted on the winch axle a frame, supporting the winch axle such that the winch axle is supported on opposite sides of the cable drum by a first and second support, the first support being located inbetween the cable drum and the chain wheel end of the winch axle; and a motor drive adapted to drive the winch a chain wheel, the chain wheel having a chain wheel body with a central opening adapted to engage the chain wheel end of the winch axle, the chain wheel being in a working position when mounted on the chain wheel end of the winch axle a chain wheel lock assembly, wherein the assembly is adapted to releasably secure the chain wheel in the working position on the chain wheel end of the winch axle, the chain wheel lock assembly comprising one or more locking members movable between a locking position and an unlocking position; and a chain wheel manipulator adapted to the exchange the chain wheel mounted on the chain wheel end of the winch axle for another chain wheel, the chain wheel manipulator having a chain wheel support adapted to support a chain wheel, the chain wheel support being positionable in a chain wheel exchange position adjacent to the chain wheel end of the winch axle to mount a chain wheel onto the winch axle end and to dismount the chain wheel from the winch axle end.

A chain and cable handling winch system including a winch, a cable drum, a chain wheel, and a chain wheel lock assembly is provided. The chain wheel lock assembly releasable secures the chain wheel in a working position on a winch axle end. An interface body is mounted on the winch axle end such that it rotates with the axle. When the chain wheel is in its working position, slots and/or ribs of the chain wheel interlock with corresponding ribs and/or slots of the interface body, such that a torque load is transferred from the chain wheel to the winch axle via the interface body. The winch system further includes a chain wheel manipulator adapted to the exchange chain wheel mounted on the winch axle for another chain wheel.