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.

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 floating mooring structure including a framework formed by a plurality of equidistant parallel tubes, a second plurality of tubes extending through the first plurality tubes and a third plurality of tubes extending through the first plurality spaced from and below the second plurality of tubes. The structure also includes peripheral berthing beams and additional flotation tanks with shock-absorbing fenders and with vent tubes that help stabilize the structure and serve as mooring posts for vessels.

A pontoon boat is provided that includes a deck and a plurality of pontoons running longitudinally beneath the deck and providing buoyancy to the pontoon boat. The plurality of pontoons include a multi-chine configuration that increases the stability of the pontoon boat and provides handling characteristics similar to that of a hulled boat. The plurality of pontoons may include two outer pontoons and a third pontoon positioned laterally intermediate the outer pontoons. The third pontoon may include a plurality of chines, and each of the outer pontoons may include at least one chine. At least a portion of each of the at least one chines of the outer pontoons may be positioned vertically below the plurality of chines of the third pontoon. The chines on the third pontoon may extend longitudinally further than each of the at least one chines of the outer pontoons.

A boat having a transom and a rear platform extending at least partially across the transom. The rear platform includes a hatch defining at least partially the rear platform, the hatch having a bottom surface, and a hatch pivot for pivoting the hatch about a hatch pivot axis from a first hatch position to a second hatch position. The boat is free of an enclosed engine compartment. The hatch at least partially defines thereunder a space for receiving a marine outboard engine. The space extends rearwardly of the transom and is open at a rear of the boat.

An inflatable water-based motorised device docking station is described. The inflatable water-based motorised device docking station includes an inflatable tube configurable to form an open ended area to receive a water-based motorised device; a floor area coupled to a portion of the inflatable tube; and a ballast bag with dump attached to the floor area and configured to stabilise the inflatable water-based motorised device docking station.

An inflatable water-based motorised device docking station is described. The inflatable water-based motorised device docking station includes an inflatable tube configurable to form an open ended area to receive a water-based motorised device; a floor area coupled to a portion of the inflatable tube; and a ballast bag with dump attached to the floor area and configured to stabilise the inflatable water-based motorised device docking station.

An assembly for a watercraft according to an example of the present disclosure includes, among other things, a flotation device including an elongated slot and a mount that has first and second flanges extending outwardly from a bracket body. The first flange is configured to be mechanically attached to a frame, and the second flange is slideably received in the slot to secure the flotation device. A method of assembly for a watercraft is also disclosed.

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.

An expansion deck system for vessels includes a frame assembly for positioning between a stationary floor of a vessel and a plurality of pontoons of the vessel. The frame assembly including a first side with a first elongated opening, and a second side with a second elongated opening. One or more sliding deck members are telescopically connected to the frame assembly by one or more sliding rails and transition between a retracted position and an extended position. In the retracted position the one or more sliding deck members are positioned between the floor and pontoons of the vessel, and in the extended position the one or more sliding deck members are positioned alongside the frame assembly.