Fender arrangement for docking a marine vessel (1) with a boat landing (2) of a marine offshore structure (3) such as a wind power plant, including at least one fender unit (12, 13) composed of elastically deformable material and provided with a receiving recess (18) for a docking rail (5) of said boat landing (2). The fender arrangement is especially characterized in that fender unit (12, 13) exhibits an internal deformation control cavity (20) positioned at a distance from the receiving recess (18) within the fender unit (12, 13) and extending at least along the width of said receiving recess (18), controlling deformation of the fender unit (12, 13) into forming a gripping hold of a docking rail (5) by compression of the internal deformation control cavity (20) when the fender unit (12, 13) is pressed against the docking rail (5).

A pneumatic fender includes: a ring-shaped metal fitting housing that is mounted on at least one end of a pneumatic fender and forms a penetrating part penetrating the inside and outside of the pneumatic fender; a plate-shaped flange that is mounted on the penetrating part to block the inside and outside of the pneumatic fender; a wireless transmitter that is mounted on the front surface of the flange defining a surface formed in the external direction of the pneumatic fender; a cover that is mounted on the front surface of the flange; a shaft that has a predetermined length and is mounted on the rear surface of the flange; a position sensor that is mounted on the internal direction end of the shaft and generates position information of the pneumatic fender; and a reflective member that is connected to the shaft between the flange and the position sensor.

A boat hull protection system to prevent structural and cosmetic damage to vessels and prevent them from sinking. The system includes inflatable members inflated using pneumatics such as compressed air that can be selectively inflated by a user along the stern, starboard or port sides, or bow of a given vessel. The inflatable members are inflated using a plurality of inflatable compartments housed within the inflatable members thereby allowing the system to continue being effective in light of a failure to a portion of the inflatable member.

A fender element which is inflatable and includes a flexible, waterproof shell which, in a deflated state, forms a bag which is housed inside a box and an external face of which delimits a chamber with the box. In the deflated state, the bag is suitable for being deployed outside the box by passing through a slot-shaped opening of the box and turning inside out by air being blown under pressure into said chamber and for being inflated outside the box to form an elongate permanent fender. In the inflated state, the shell is suitable for being deflated and retracted inside the box by forced extraction of the air contained in said chamber.

A boat fender is disclosed. The fender has a body having a width, a depth, a first bumper, and a second bumper. The first and second bumper may have an enlarged first intermediate portion. The first bumper is width adjacent the second bumper.

An arrangement of fenders nested together for compact storage, the fenders including two or more cylindrical bodies having a cavity accessed through the fender top, the fenders being similar shape but graduated in size such that the cavity of a larger fender tensionally receives the next smaller sized fender, the outer diameter of the smaller fender equal to the inner diameter of the larger fender cavity. A fender has a rigid inner core surrounded by a compressible shell made of foam or similar material. The inner core has attachment points for a rope or line. The smallest nesting fender in the set has a cavity diameter sized to fit a commercially-available, off-the-shelf fender. The fenders may be separated and deployed at individual locations on a vessel, or kept together and deployed as a single fender capable of absorbing a greater impact than any of the fenders individually would absorb.

A pneumatic fender and a mouth piece metal for a pneumatic fender with an open/close valve fixed at a position in which a through hole formed in a dividing wall constituting a receiving chamber, where the valve is closed by closed position fixing members. A safety valve is isolated from a cavity of a fender bladder by a receiving chamber, the safety valve being able to be detached and attached while the pneumatic fender is in use. A confirmation test of a valve opening pressure of the safety valve is performed by opening a receiving chamber open/close valve and raising an internal pressure of a cavity of the receiving chamber to a pressure threshold via a receiving chamber communication passage. The open/close valve is fixed at a position in which the through hole is open by open position fixing member.

A pneumatic fender and a mouth piece metal with an open/close valve is biased by a resilient member toward a closing direction of a through hole formed on a dividing wall constituting a receiving chamber. A safety valve is isolated from a cavity of a fender bladder by a receiving chamber, thus allowing the safety valve to be able to be detached and attached while the pneumatic fender is in use. A confirmation test of a valve opening pressure of the safety valve is performed by opening a receiving chamber open/close valve and raising an internal pressure of a cavity of the receiving chamber to a pressure threshold (Pm) via a receiving chamber communication passage. Upon an internal pressure (P) of the cavity being less than the pressure threshold (Pm) and greater than a standard pressure (Pc), the open/close valve opens the through hole, thus allowing the safety valve to function.

A locking device for securing and positioning an object when it is strung on a line by a through-hole of the object. The locking device comprises an elongated shaft defining a partial cavity formed therein. The elongated shaft or a deepest portion of the partial cavity or both is tapered relative to a longitudinal axis of the shaft. The partial cavity extends along the longitudinal axis of the shaft, and the deepest portion of the partial cavity and the exterior surface of the elongated shaft forms a tapering angle. The locking device is inserted into through-hole of the object such that the rope or line fits into the partial cavity. Pressure may be applied to put the locking device into the through-hole such that there is no movement between the object and the line; thus securely positioning the object on the line. The locking device may be used to securely position a through-hole type boat fender on a line.

A sponson attachment for an airboat allows the airboat to increase its safety and stability very quickly. A method for attaching a sponson to an airboat hull includes attaching first and second flexible tethers to a side of the sponson. The method also includes removably securing the first flexible tether to an exterior of the airboat hull adjacent a gunnel, and removably securing the second flexible tether below the first flexible tether on the exterior of the hull.