The present invention relates generally to underwater wings for providing lift to boats. More particularly, exemplary embodiments of the present invention include a pair of underwater wings that attach to the hulls of a pontoon. The purpose of the wings is to provide a designated amount of lift to reduce drag and improve performance of the watercraft. This is different from a traditional hydrofoil, which is designed to lift a boat completely out of the water. Ideally, the wings are connected to the deck of the pontoon boat via adjustable mounts that allow the wings to be raised or lowered in the water to adjust the amount of drag.

An alignment guide for a pontoon boat lift that includes a pair of laterally spaced rails, where the spacing corresponds to the spacing between the pontoon floats. The rails are attached to the boat lift by adjustable brackets, so they are positioned at an elevation above the waterline of the pontoon floats, and below the deck that is supported by the floats. A stop bar is positioned at an elevation above the boat motor and extends between rail extensions that are directed downwardly and rearwardly from the spaced rails.

A trailer pontoon bottom has built in wheels designed to fold under the trailer pontoon to be clear of the water and to extend out and lock for land use and be clear of the pontoons. A pair of swing arms each having a first end attached to an inside axial hub of the wheel are designed to rotate on a boss of the first end. A second end of the swing arm is configured to rotate a maximum of 90 degrees from its folded position into a trailer position. An axis parallel to a back end of the trailer pontoon is configured to attach to each of the pair of swing arms at a respective pivot located a swing arm distance from an edge of the trailer pontoon. The axis is rotatable by less than 90 degrees to enable each wheel to retract against a suspension bumper.

An alignment guide for a pontoon boat lift that includes a pair of laterally spaced rails, where the spacing corresponds to the spacing between the pontoon floats. The rails are attached to the boat lift by adjustable brackets, so they are positioned at an elevation above the waterline of the pontoon floats, and below the deck that is supported by the floats. A stop bar is positioned at an elevation above the boat motor and extends between rail extensions that are directed downwardly and rearwardly from the spaced rails. The alignment guide functions to provide support under the deck of the pontoon boat, to limit movement of the craft from port and starboard, and to stop the craft when it has advanced to the full forward position to keep it properly positioned bow to stern.

A pontoon boat includes port and starboard pontoons and cross members connecting the pontoons. A shock absorber may be installed at each point of connection of the pontoons to the cross members. A cross member may be embodied as a double-webbed beam having first and second parallel flanges and first and second webs disposed between and connected to the flanges. Each pontoon may include a two-stage lifting strake having a first surface and a second surface inclined from the first surface.

Embodiments include a retrofit pontoon system including a pontoon, the pontoon having a pontoon body defining a first cavity, the pontoon body having a first aperture; a retrofit assembly, the retrofit assembly including a selectively fillable container sized to pass through the first aperture; and a pump. The pump is operably coupled with the selectively fillable container such that operation of the pump selectively fills and drains water from the selectively fillable container, wherein filling the selectively fillable container lowers the profile of the pontoon in the water and emptying the selectively fillable container raises the profile of the pontoon in the water.

A structure for stabilizing a barrel on a pontoon vessel includes a deck structure. First And second hull frame members are affixed to the deck structure and extend therealong. In spaced relationship to each other. A first and second conduit extends along a respective hull frame member; the first conduit being spaced from the second conduit by a distance to receive a portion of a barrel therebetween and each conduit contacting the barrel above a barrel central line. A strap having a first end anchored near the first conduit, and tracing a path from the anchor beneath, and in contact with, the barrel disposed between the first conduit in the second conduit, along the second conduit, and returning to the first conduit by tracing a path from the second conduit to the first conduit beneath and in contact with the barrel.

The invention relates to a floating mooring structure comprising a framework formed by a first plurality of equidistant parallel tubes (1), having tubes (2) belonging to a second plurality of tubes (2) extending across the top thereof and tubes (3) belonging to a third plurality of tubes (3) extending across the bottom thereof. The structure also comprises peripheral berthing beams (7, 7) and additional flotation tanks (9 and 10) with shock-absorbing fenders (13) and with vent tubes (1) that help stabilise the structure and serve as mooring posts (12 and 12) for vessels.

A device for coupling a propulsor to a marine vessel. The device includes a mounting bracket configured for attachment to the marine vessel. A support frame has a carriage and is configured for the propulsor to be coupled thereto, where the carriage is configured to slidably engage with the mounting bracket into a fixed position. A member is manually engageable to prevent the carriage from sliding out of the fixed position. The propulsor is coupled to the marine vessel by sliding the carriage into the fixed position and engaging the member, where the propulsor is operable to propel the marine vessel in water when the carriage is in the fixed position, and where the propulsor is configured for decoupling from the marine vessel by disengaging the member and sliding the carriage out of engagement with the mounting bracket.

An agricultural amphibious bait feeding boat includes a boat body. A bait feeding device is fixed to one end of the boat body, and a propulsion device is fixed to the other end of the boat body. The boat body includes two foam floating bodies, foam fixing carbon rods, a transverse carbon rod, tube ferrule fixing assemblies, and tee joints. The two foam floating bodies include a left foam floating body and a right foam floating body, the foam fixing carbon rods parallel to each other are respectively arranged above the two foam floating bodies, and the foam floating bodies and the foam fixing carbon rods are fixed through the tube ferrule fixing assemblies. The transverse carbon rod is connected to the foam fixing carbon rods through the tee joints, and the left foam floating body and the right foam floating body are fixedly connected to each other.