The invention relates to a vessel (1), especially a drillship or so-called drilling ship. The vessel comprises a hull (3) having a bottom surface (5) and a deck (7). Said vessel is provided with a moon pool (2), which extends from said bottom surface of the hull in an upward direction through the hull. Further, said vessel is provided with a cavity (10) located at a front side of the moon pool. Said cavity is at least partly open at a bottom side thereof in order to allow water to flow into said cavity. Moreover, said cavity is at least partly open at a rear side of said cavity in order to allow water to flow directly from said cavity into the moon pool, as a result of which moon pool sloshing can be diminished and the mean flow resistance of the vessel when sailing can be reduced.

An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake. A wake modifying system for modifying a wake produced by a watercraft traveling through water may include a rudder pivotally mounted to the watercraft for steering the watercraft, a fin pivotally mounted to the watercraft substantially along a centerline of the watercraft and forward the rudder, wherein the fin pivots about an upright axis to modify the wake produced by the watercraft traveling through the water, an actuator mounted within the watercraft and operably coupled to the fin for pivoting the fin relative to the centerline, and a controller mounted on the watercraft allowing an operator to control the actuator and selectively pivot the fin to a desired angle d relative to the centerline.

An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake. A wake modifying system for modifying a wake produced by a watercraft traveling through water may include a rudder pivotally mounted to the watercraft for steering the watercraft, a fin pivotally mounted to the watercraft substantially along a centerline of the watercraft and forward the rudder, wherein the fin pivots about an upright axis to modify the wake produced by the watercraft traveling through the water, an actuator mounted within the watercraft and operably coupled to the fin for pivoting the fin relative to the centerline, and a controller mounted on the watercraft allowing an operator to control the actuator and selectively pivot the fin to a desired angle d relative to the centerline.

This invention relates to a pipe-like appendage for a sharp-edged pontoon of an offshore vessel, a pontoon structure comprising the pipe-like appendage and a method of converting a sharp-edged pontoon into a pontoon comprising at least one rounded-edge.

This invention relates to a pipe-like appendage for a sharp-edged pontoon of an offshore vessel, a pontoon structure comprising the pipe-like appendage and a method of converting a sharp-edged pontoon into a pontoon comprising at least one rounded-edge.

The invention is a watercraft with at least one hull which creates hydrodynamic lift by using narrowing concave channels (1) on the underside of the said at least one hull where propulsion (3) is placed such that the said propulsion draws water through the said narrowing concave channels (1).

A water diverter for outboard marine motors is presented. In one embodiment, the water diverter is adapted to be secured to a transom bracket which includes a portion adapted to be mounted on a boat transom. The water diverter includes a body and a bracket. The body has a horizontal deflection plate with a triangular shape. Two vertical deflection plates extend upward along the edges of the horizontal deflection plate. The bracket includes a horizontal mounting surface having a triangular shape. Two vertical attachment walls extend downward along the sides of the horizontal mounting surface. The bracket is sized to fit within the body with alignment of attachment openings of the vertical deflection plates and attachment holes of the vertical attachment walls determining a fastener-based selectively adjustable vertical displacement between the horizontal deflection plate and the horizontal mounting surface.

A water diverter for outboard marine motors is presented. In one embodiment, the water diverter is adapted to be secured to a transom bracket which includes a portion adapted to be mounted on a boat transom. The water diverter includes a body and a bracket. The body has a horizontal deflection plate with a triangular shape. Two vertical deflection plates extend upward along the edges of the horizontal deflection plate. The bracket includes a horizontal mounting surface having a triangular shape. Two vertical attachment walls extend downward along the sides of the horizontal mounting surface. The bracket is sized to fit within the body with alignment of attachment openings of the vertical deflection plates and attachment holes of the vertical attachment walls determining a fastener-based selectively adjustable vertical displacement between the horizontal deflection plate and the horizontal mounting surface.

The invention relates to a vessel, especially a drillship or so-called drilling ship. The vessel comprises a hull having a bottom surface and a deck. A moon pool extends from the bottom surface of the hull in an upward direction through the hull. Further, the vessel is provided with a cavity located at a rear side of the moon pool, with the cavity being at least partly open at a front side to allow water to flow from the moon pool directly into the cavity. Further, the cavity is at least partly open at a bottom side to allow water to flow out of the cavity. The cavity is defined at least partly by a trailing wall sloping downwards in a rearward direction and at least partly by a ceiling connecting a rear wall of the moon pool with the downwardly sloping trailing wall.

The invention relates to a vessel, especially a drillship or so-called drilling ship. The vessel comprises a hull having a bottom surface and a deck. A moon pool extends from the bottom surface of the hull in an upward direction through the hull. Further, the vessel is provided with a cavity located at a rear side of the moon pool, with the cavity being at least partly open at a front side to allow water to flow from the moon pool directly into the cavity. Further, the cavity is at least partly open at a bottom side to allow water to flow out of the cavity. The cavity is defined at least partly by a trailing wall sloping downwards in a rearward direction and at least partly by a ceiling connecting a rear wall of the moon pool with the downwardly sloping trailing wall.