A cockpit extension that extends aft of a boat transom for increasing the afterdeck area of the boat. The cockpit extension includes a deck that can be accessed from the afterdeck of the boat and an under-face beneath the deck that can be above or below the water-line of the boat. The cockpit extension can also include one or more of a gunwale, inner bulkhead, and outer freeboard. A running surface can also be provided on the under-face that improves the backing down process of the boat. The boat has at least two outboard engines, attached on the port and starboard sides of the boat transom, respectively.

A method for constructing a hull of an offshore structure includes (a) welding a plurality of plates together to form a plate assembly. The method also includes (b) passing the plate assembly through a rolling machine with the plate assembly in a vertical orientation. In addition, the method includes (c) bending the plate assembly into a cylinder during (b). The cylinder includes a pair of circumferentially adjacent free ends. Further, the method includes (d) welding the free ends of the cylinder together after (c) to form a cylindrical external wall.

A method for constructing a hull of an offshore structure includes (a) welding a plurality of plates together to form a plate assembly. The method also includes (b) passing the plate assembly through a rolling machine with the plate assembly in a vertical orientation. In addition, the method includes (c) bending the plate assembly into a cylinder during (b). The cylinder includes a pair of circumferentially adjacent free ends. Further, the method includes (d) welding the free ends of the cylinder together after (c) to form a cylindrical external wall.

A boat pontoon having a concave V-shape on a bottom portion thereof, generally straight vertical sides, a flat top panel member, and a removable and replaceable skid pad running longitudinally along the bottom of the pontoon. Vertically oriented gussets are positioned on an interior of the pontoon, to provide structural integrity and additional strength. In a preferred embodiment, a buoyant foam is provided within the interior cavity of the pontoon.

A boat pontoon having a concave V-shape on a bottom portion thereof, generally straight vertical sides, a flat top panel member, and a removable and replaceable skid pad running longitudinally along the bottom of the pontoon. Vertically oriented gussets are positioned on an interior of the pontoon, to provide structural integrity and additional strength. In a preferred embodiment, a buoyant foam is provided within the interior cavity of the pontoon.

A jet propulsion device is mounted to a vessel body and connected to a drive shaft. A bearing rotatably supports the drive shaft. A bulkhead is disposed inside the vessel body and below a deck. The bulkhead supports the bearing and includes a gap disposed between the drive shaft and the deck. The drive shaft and the gap overlap as seen in a vertical direction.

A floating vessel for use as a hydrogen and/or ammonia floating production storage and offloading vessel comprising an inner hull wall; at least two bulkheads, wherein the at least two bulkheads are disposed within the inner hull wall, forming at least three separate storage spaces; a series of cross-members, wherein the series of cross members are disposed between the at least two bulkheads to provide support and stability to the at least two bulkheads; and a deck, wherein the deck is supported by and disposed upon the at least two bulkheads; and wherein the at least three separate storage spaces are configured to contain gasses and/or liquids.

A floating vessel for use as a hydrogen and/or ammonia floating production storage and offloading vessel comprising an inner hull wall; at least two bulkheads, wherein the at least two bulkheads are disposed within the inner hull wall, forming at least three separate storage spaces; a series of cross-members, wherein the series of cross members are disposed between the at least two bulkheads to provide support and stability to the at least two bulkheads; and a deck, wherein the deck is supported by and disposed upon the at least two bulkheads; and wherein the at least three separate storage spaces are configured to contain gasses and/or liquids.

A bulkhead protector apparatus is described. The protector is configured to be mounted within a cavity of the sheetpile of a bulkhead in order to prevent waves, wake, and debris from reaching the top portion of the bulkhead, minimizing damage and prolonging the life of the bulkhead. An angled waterguard portion is disposed within the cavity, and is configured to deflect water down and away from the top of the bulkhead. The waterguard portion is mounted to a whaler of the bulkhead via a planar mount portion which is secured to the underside of the whaler of the bulkhead via stainless steel lag bolts.

A bulkhead protector apparatus is described. The protector is configured to be mounted within a cavity of the sheetpile of a bulkhead in order to prevent waves, wake, and debris from reaching the top portion of the bulkhead, minimizing damage and prolonging the life of the bulkhead. An angled waterguard portion is disposed within the cavity, and is configured to deflect water down and away from the top of the bulkhead. The waterguard portion is mounted to a whaler of the bulkhead via a planar mount portion which is secured to the underside of the whaler of the bulkhead via stainless steel lag bolts.