A hull is for a vessel and includes an elongated body rotatably connected to the vessel and a first end portion and a second end portion. The longitudinal axis of the elongated body substantially coincides with the longitudinal axis of the vessel and the elongated body is formed with a helical shape at least in a portion. The helical portion of the elongated body is provided with a star-shaped cross section.

The men's eight according to the invention has an elongated hull that ends in a pointed bow and a pointed stern. Given a total weight of 938 kg, the waterline is 17,211 mm±5%, preferably ±3% and most preferably ±2%. Given division into 15 segments of equal length and in the case of a total weight of 938 kg, particular values are also presented in table form for the respective cross-sectional area below the waterline WL, the respective circumference below the waterline WL, the respective width at the waterline WL, and the respective width ratio based on the middle segment 7, each having a tolerance of ±5%, preferably ±3% and most preferably ±2%. The women's eight according to the invention is designed with similar lines for a total weight of 858 kg.

The men's eight according to the invention has an elongated hull that ends in a pointed bow and a pointed stern. Given a total weight of 938 kg, the waterline is 17,211 mm±5%, preferably ±3% and most preferably ±2%. Given division into 15 segments of equal length and in the case of a total weight of 938 kg, particular values are also presented in table form for the respective cross-sectional area below the waterline WL, the respective circumference below the waterline WL, the respective width at the waterline WL, and the respective width ratio based on the middle segment 7, each having a tolerance of ±5%, preferably ±3% and most preferably ±2%. The women's eight according to the invention is designed with similar lines for a total weight of 858 kg.

A moon pool control device (5) for a marine vessel (1) comprises one or more closure members (8a,b) arranged for movement in the moon pool, between a moon pool closing position in a region of the moon pool opening (7), a moon pool open position, and a retracted position, and guiding means (14a,b; 15a,b; 17a,b; 18a,b) and motive means (9a,b; 10a,b; 22) configured for moving the closure member between said positions. In a particular embodiment, a pair of closure members (8a,b) and corresponding guiding means (14a,b; 15a,b; 17a,b; 18a,b) and motive means (9a,b; 10a,b; 22) are arranged on opposite lateral sides of the moon pool and configured to cooperate to close the opening (7) when both closure member s are in the closing position. The closure members comprise a continuous surface that forms a fluid barrier. The closure members may be retrieved onto the deck of the vessel.

A moon pool control device (5) for a marine vessel (1) comprises one or more closure members (8a,b) arranged for movement in the moon pool, between a moon pool closing position in a region of the moon pool opening (7), a moon pool open position, and a retracted position, and guiding means (14a,b; 15a,b; 17a,b; 18a,b) and motive means (9a,b; 10a,b; 22) configured for moving the closure member between said positions. In a particular embodiment, a pair of closure members (8a,b) and corresponding guiding means (14a,b; 15a,b; 17a,b; 18a,b) and motive means (9a,b; 10a,b; 22) are arranged on opposite lateral sides of the moon pool and configured to cooperate to close the opening (7) when both closure member s are in the closing position. The closure members comprise a continuous surface that forms a fluid barrier. The closure members may be retrieved onto the deck of the vessel.

A vessel and method to perform subsea wellbore related operations, e.g. slim hole technique drilling of a subsea wellbore are disclosed. The vessel has a hull with at least one moonpool defining first and second moonpool areas. A vertical tower is mounted on a tower supporting hull structure and has a vertical operative face. A hoisting device has a winch and winch driven cable, and is adapted to suspend a load from said vertical tower via said at least one winch driven cable and to manipulate the suspended load in a firing line of the tower that extends along and outside of said vertical operative face of the tower. The tower is slewable about a vertical slew axis by means of a slewing drive at least into first and second operative positions wherein the firing line extends through the first and second moonpool areas respectively.

A vessel and method to perform subsea wellbore related operations, e.g. slim hole technique drilling of a subsea wellbore are disclosed. The vessel has a hull with at least one moonpool defining first and second moonpool areas. A vertical tower is mounted on a tower supporting hull structure and has a vertical operative face. A hoisting device has a winch and winch driven cable, and is adapted to suspend a load from said vertical tower via said at least one winch driven cable and to manipulate the suspended load in a firing line of the tower that extends along and outside of said vertical operative face of the tower. The tower is slewable about a vertical slew axis by means of a slewing drive at least into first and second operative positions wherein the firing line extends through the first and second moonpool areas respectively.

A nonlimiting example of a yacht preserver includes a handle, an inflator device connected to an upper end of the handle and an inflatable bladder connected to a lower end of the handle. In this nonlimiting example, the inflator device includes a gas canister that is connected to the inflatable bladder by a tube and is configured to deliver gas to inflate the bladder upon activation. The yacht preserver may be used to seal an opening of a yacht by placing the uninflated bladder near the opening in the yacht and activating the inflator device allowing the bladder to expand to seal the opening.

A nonlimiting example of a yacht preserver includes a handle, an inflator device connected to an upper end of the handle and an inflatable bladder connected to a lower end of the handle. In this nonlimiting example, the inflator device includes a gas canister that is connected to the inflatable bladder by a tube and is configured to deliver gas to inflate the bladder upon activation. The yacht preserver may be used to seal an opening of a yacht by placing the uninflated bladder near the opening in the yacht and activating the inflator device allowing the bladder to expand to seal the opening.

A stabilized flotation platform that is used for supporting supplies for those enjoying time in the water. The uniqueness is the stability provided by its construction such that materials contained on or in the device do not spill into the water.