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 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.

The invention relates to equipment comprising an underwater robot (1) and a device (2) for the remote control of the robot, which can communicate with each other, wherein: the robot comprises means for underwater movement and an image-capturing device; and the control device comprises 3D glasses designed so that a user wearing the glasses views the underwater environment of the robot in three dimensions on the basis of the images captured by the robot, and means for remotely guiding the movement of the robot on the basis of the three-dimensional underwater environment viewed.

The invention relates to equipment comprising an underwater robot (1) and a device (2) for the remote control of the robot, which can communicate with each other, wherein: the robot comprises means for underwater movement and an image-capturing device; and the control device comprises 3D glasses designed so that a user wearing the glasses views the underwater environment of the robot in three dimensions on the basis of the images captured by the robot, and means for remotely guiding the movement of the robot on the basis of the three-dimensional underwater environment viewed.

A boat lifting crane includes an upper frame, which in turn has two upper beams, and at least two pairs of carriages. Each carriage of each pair is mounted so that it can move on a respective upper beam and can translate for a respective stroke portion. The boat lifting crane further includes at least one lifting belt, which is extended between two carriages of a same pair of carriages. At least part of the stroke portion of a carriage of a pair of carriages is superimposed on at least part of the stroke portion of a carriage of another pair of carriages.

A boat lifting crane includes an upper frame, which in turn has two upper beams, and at least two pairs of carriages. Each carriage of each pair is mounted so that it can move on a respective upper beam and can translate for a respective stroke portion. The boat lifting crane further includes at least one lifting belt, which is extended between two carriages of a same pair of carriages. At least part of the stroke portion of a carriage of a pair of carriages is superimposed on at least part of the stroke portion of a carriage of another pair of carriages.

System for launch and recovery of a surface vehicle, comprising a floating cradle structure configured to receive the surface vehicle, the cradle structure being bottomless such that contact between a submersed portion of the surface vehicle and the cradle structure is avoided upon receiving the surface vehicle.

A boat lift has one or more pumps that evacuate water from a first flotation tank construct and a second flotation tank construct to create flotation of the boat lift. Modular boat lifts may be constructed according to the invention that have substantial size but are transportable by truck for construction on site.

A boat lift has one or more pumps that evacuate water from a first flotation tank construct and a second flotation tank construct to create flotation of the boat lift. Modular boat lifts may be constructed according to the invention that have substantial size but are transportable by truck for construction on site.

Embodiments of a floating bunk system of this disclosure include a hull pad assembly extending in a longitudinal direction and including two hull pads spaced apart from one another and, at each end of the hull pad assembly, a sliding guide assembly including a pair of guide poles, each guide pole of the pair extending in a vertical direction; an upper end channel extending in a lateral direction and connected to the hull pad assembly and to the pair of guide poles; a lower end channel extending in the lateral direction and including a pair of lower bushings; each lower bushing receiving a respective guide pole; the upper end channel being in a fixed position relative to the pair of guide poles; the lower end channel being slidably vertically displaceable along the guide poles toward and away from the upper end channel.