A buoyancy tank for a portable floatation apparatus which allows for the elevation of a watercraft above a water-line and which allows for the removal of the watercraft from a body of water. The buoyancy tank has at least one and/or a plurality of integrated cylindrical structures which supports the floatation apparatus in transport and storage. The integrated cylindrical structures provide sufficient support to allow the removal of the floatation apparatus by use of a boat lift and further provide sufficient support to allow a watercraft to be stacked on top of the floating apparatus while the floating apparatus is stacked on top of the floating apparatus for the purposes of storage. A plurality of said buoyancy tanks may be connected to the portable floatation apparatus by use of connecting means. The portable floatation apparatus should have a pumping device which pumps a sufficient volume of air into a plurality of the buoyancy tank which is effective to selectively and conveniently elevate a watercraft above a water line.

A floating dock system can include a base portion, a cradle, at least one guide assembly, and a lift assembly. The base portion can include a lateral deck portion extending along a first plane and defining a boat slip, and at least one float element configured to provide a float element buoyancy force sufficient to maintain at least part of the deck portion above the water surface. The can include a lateral upper portion extending along a second plane, and a support structure configured to support the nautical vessel. A guide can include male and female guide portions. A lift assembly can include a motor configured to move the cradle between upper and lower positions.

A floating platform is attached to another object. The object may be fixed to the earth or it may be a floating object such as a floating dock or a vessel. The floating platform is held in horizontal position relative to the object to which it is attached, but vertical movement of the floating platform relative to the object is permitted. The object is connected to the floating platform by devices that have blades extending from. Each blade slidably engages a bracket, with the slidable blade permitting horizontal adjustment of the distance of the floating platform from the object during installation of the floating platform. Guide posts or piles slidably engage pile guides mounted to the object, permitting the floating platform to move vertically relative to the object, but fixing the floating platform's horizontal position relative to the object.

A floating platform is attached to another object. The object may be fixed to the earth or it may be a floating object such as a floating dock or a vessel. The floating platform is held in horizontal position relative to the object to which it is attached, but vertical movement of the floating platform relative to the object is permitted. The object is connected to the floating platform by devices that have blades extending from. Each blade slidably engages a bracket, with the slidable blade permitting horizontal adjustment of the distance of the floating platform from the object during installation of the floating platform. Guide posts or piles slidably engage pile guides mounted to the object, permitting the floating platform to move vertically relative to the object, but fixing the floating platform's horizontal position relative to the object.

A loading ramp includes a contoured component with upwardly sloping surfaces and an opening for receiving the hull of a watercraft. The contoured component has a centrally located lower surface relative to the sides and front of the contoured unit. The loading ramp incorporates a way for the loading ramp to attach to a modular floating vessel platform.

A weight distribution and stiffening system is provided for modular floating platforms by creating internal channels that allow for the incorporation of stiffening members within the modular floating platform assembly. Float modules with horizontal recessed areas that are aligned with adjacent float modules to create open channels within the body of a modular floating platform.

A free-floating watercraft lift includes a plurality of pairs of tanks each having a first tank and a second tank, a plurality of lower frame assemblies, first and second upper frame assemblies, and a control system comprising at least one blower for selectively providing air to each of the first and second tanks of the plurality of pairs of tanks. The first and second tanks of each pair of tanks are laterally spaced-apart and facing one another. Each one of the lower frame assemblies connects the first tank and the second tank of a separate one of the pairs of tanks The first upper frame assembly connects each of the first tanks of the plurality of pairs of tanks and the second upper frame assembly connects each of the second tanks of the plurality of pairs of tanks.

One example provides a roller assembly for conveying a watercraft on a floating drive-on watercraft port. The roller assembly includes an axle, a center roller disposed on the axle, and a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle. Each shoulder roller includes an outer sidewall facing away from the center roller, and an inner sidewall facing the roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the inner sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.

One example provides a roller assembly for conveying a watercraft on a floating drive-on watercraft port. The roller assembly includes an axle, a center roller disposed on the axle, and a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle. Each shoulder roller includes an outer sidewall facing away from the center roller, and an inner sidewall facing the roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the inner sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.

One example provides a floating drive-on pontoon port including a plurality of floating sections pivotally coupled together in series with one another to form an articulating port track base and an articulating starboard track base extending longitudinally in parallel with one another, the port and starboard track bases each having a lower surface to be disposed in water and an opposing upper surface to face away from the water. A port transport track extends longitudinally across the upper surface of the port track base, and a starboard transport track extends longitudinally across the upper surface of the starboard track base and in parallel with the port transport track, the port and starboard transport tracks each comprising a series of spaced apart rollers configured to respectively receive, transport, and support a port pontoon and a starboard pontoon of a pontoon during loading, unloading, and storage of the pontoon boat on the pontoon port. A lateral position of the port and starboard transport tracks relative to one another is adjustable to adjust a lateral distance between the port and starboard transport tracks to accommodate pontoon boats of different widths.