A ship including at least two hull sections spliced together along the axial direction of the ship. The two adjacent hull sections are connected through a splicing structure. The splicing structure includes a first matching structure and a second matching structure. The first matching structure includes a protrusion and a groove that are in a vertical inserting fit. The second matching structure includes a fixed base and a rotating base for rotating to press the fixed base. The hull sections of the present invention are stable to connect and convenient to disassemble and assemble.

A watercraft suitable for fishing has a rotomolded deck and hull. The deck includes a cockpit with substantially vertical sidewalls, a rear wall, a pedaling installation, and a flat floor between the sidewalls extending from the rear wall to the pedaling installation in the cockpit. The hull includes a depression between lateral protrusions amidships and a stern with a rounded cross section so that the combination of the lateral protrusions and rounded stern cross section allow the watercraft to track straight on water and for the stern to move laterally when the watercraft is turned on a body of water. The watercraft may also include a seat movably mounted onto spaced apart grooves installed on the flat floor of the cockpit that extend from a rear position near the rear wall to a forward position near the pedaling installation.

A watercraft suitable for fishing has a rotomolded deck and hull. The deck includes a cockpit with substantially vertical sidewalls, a rear wall, a pedaling installation, and a flat floor between the sidewalls extending from the rear wall to the pedaling installation in the cockpit. The hull includes a depression between lateral protrusions amidships and a stern with a rounded cross section so that the combination of the lateral protrusions and rounded stern cross section allow the watercraft to track straight on water and for the stern to move laterally when the watercraft is turned on a body of water. The watercraft may also include a seat movably mounted onto spaced apart grooves installed on the flat floor of the cockpit that extend from a rear position near the rear wall to a forward position near the pedaling installation.

A cooler installable on a kayak includes: a hollow cooler body tapering from an end adjacent to a kayak seat to a narrower end adjacent an end of the kayak; a flange portion formed around an upper end of the cooler body and located above a deck of the kayak when the cooler is installed on the kayak, the flange portion shaped to fit flush against an upper surface of the deck of the kayak; and a lid hingedly attached to the flange portion and shaped to cover an opening formed within the flange portion when in a closed position.

A cooler installable on a kayak includes: a hollow cooler body tapering from an end adjacent to a kayak seat to a narrower end adjacent an end of the kayak; a flange portion formed around an upper end of the cooler body and located above a deck of the kayak when the cooler is installed on the kayak, the flange portion shaped to fit flush against an upper surface of the deck of the kayak; and a lid hingedly attached to the flange portion and shaped to cover an opening formed within the flange portion when in a closed position.

In one example, a method includes positioning, within a mold, a device with a movable element that defines a portion of a volume, and the volume is contained within the mold, as part of a molding process, at least partly defining a molded watercraft by introducing plastic into the mold, disposing the plastic about the movable element, and with the movable element, excluding the plastic from the portion of the volume that is defined by the movable element so as to define a recess and an undercut that are integral with the watercraft and extend lengthwise with respect to a centerline of the watercraft, and the recess and undercut are integral, and communicate, with each other.

In one example, a watercraft includes a hull in the form of a unitary, single-piece structure that is substantially hollow, and made of plastic. A grip is provided that is integral with the hull and includes a recess that is formed in a skin of the hull and is integral with the hull, and the grip also includes an undercut that is formed in the skin of the hull proximate an edge of the recess. The undercut is integral with the hull and communicates with the recess.

A personal standing balance assist assembly is adapted for use in a recreational watercraft. The balance assist assembly includes a balance assist pole having a distal end for being grasped by an occupant in a standing position on the recreational watercraft. A scupper plug is located at a proximal end of the balance assist pole and is configured to engage the watercraft adjacent a top mouth of the scupper hole. A hull plug is configured to engage the watercraft adjacent a bottom mouth of the scupper hole. An elongated assembly connector extends vertically through the scupper hole and is adapted for urging the scupper plug and hull plug into close contact with the watercraft proximate respective top and bottom mouths of the scupper hole, thereby securing the balance assist assembly to the watercraft.

A personal standing balance assist assembly is adapted for use in a recreational watercraft. The balance assist assembly includes a balance assist pole having a distal end for being grasped by an occupant in a standing position on the recreational watercraft. A scupper plug is located at a proximal end of the balance assist pole and is configured to engage the watercraft adjacent a top mouth of the scupper hole. A hull plug is configured to engage the watercraft adjacent a bottom mouth of the scupper hole. An elongated assembly connector extends vertically through the scupper hole and is adapted for urging the scupper plug and hull plug into close contact with the watercraft proximate respective top and bottom mouths of the scupper hole, thereby securing the balance assist assembly to the watercraft.

A process and associated system for creating color effects using extrudable material, such as plastic and metal for example, are presented. Flows of first and second viscous materials of respective colors are provided and then combined in a predetermined pattern to form a stream of combined viscous material. A dynamic mixer is the then used to apply a predetermined dividing, overturning and combining motion to the stream of combined viscous material to partially mix the first viscous material and the second viscous material, such that upon exiting the dynamic mixer, the first material of the first color and the second material of the second color form a color pattern in the stream of combined viscous material. The dynamic mixer has elements configured for acquiring a specific radial orientation in a range of radial orientations that may be varied during the application of the dividing, overturning and combining motion to the stream of combined viscous material to cause variations in the color pattern in the stream of combined viscous material. Sheets of extruded material may be created using such process and system and used in the manufacturing of many different products including, but not limited to, kayaks, stand-up paddle boards, garden furniture and many others. In some embodiments, the sheets may be characterized by color bands extending diagonally with reference to a longitudinal extent of the sheet.