Provided is a capsize risk level calculation system which can calculate a capsize risk level providing an index of the capsize risk on an oscillation of hull without using hull information. This system includes an acceleration sensor detecting a reciprocating motion in an up-down direction of a vessel as an oscillation in an up-down direction of a virtual oscillation center axis; an angular velocity sensor detecting a simple pendulum motion in a rolling direction around the vessel center axis as a simple pendulum motion of the vessel COG around the oscillation center axis; and an arithmetic part calculating a capsize risk level from an oscillation radius connecting between the oscillation center axis and the vessel COG, and a capsize limit oscillation radius connecting between the oscillation center axis and the vessel metacenter, which are obtained on the results of detection by the acceleration sensor and the angular velocity sensor.

A marine vessel hull includes an outer hull layer and an inner liner connected to the outer hull layer forming a cavity therebetween. A wireless identification device is contained within the cavity between the outer hull layer and the inner liner. The wireless identification device stores and wirelessly transmits at least one of a vessel identifier, manufacture information, and ownership information for the marine vessel.

The invention relates to a method for applying and molding a moldable coating compound (4), which is viscous during a predetermined application period and is cured once the application period has elapsed, onto a subsurface (2), in particular the outer skin of a watercraft, having the following steps: During the application period, the coating compound (4) is applied onto the subsurface (2); during the application period, a flexible planar substrate (6) is placed onto the applied coating compound (4); and, during the application period, a molding tool (8) is brought temporarily to bear on the substrate (6) to bring the surface (4a) of the coating compound (4) into a required shape.

The invention relates to a method for applying and molding a moldable coating compound (4), which is viscous during a predetermined application period and is cured once the application period has elapsed, onto a subsurface (2), in particular the outer skin of a watercraft, having the following steps: During the application period, the coating compound (4) is applied onto the subsurface (2); during the application period, a flexible planar substrate (6) is placed onto the applied coating compound (4); and, during the application period, a molding tool (8) is brought temporarily to bear on the substrate (6) to bring the surface (4a) of the coating compound (4) into a required shape.

Building a complete ship hull, including many internals (bulkhead, holds), as a single, 3D printed device. A Stewart crane is used for gross positioning, while a multitude of beam deposition arms can be used for finer positioning. In a shipbuilding method, this means that the hull, floors, main piping, tanks, quarters, stairs, doorways, etc. can all be printed, in place, as part of a multi-step process.

Building a complete ship hull, including many internals (bulkhead, holds), as a single, 3D printed device. A Stewart crane is used for gross positioning, while a multitude of beam deposition arms can be used for finer positioning. In a shipbuilding method, this means that the hull, floors, main piping, tanks, quarters, stairs, doorways, etc. can all be printed, in place, as part of a multi-step process.

A vehicle frame may comprise a plurality of interlocking tab and slot frame members forming a three-dimensional structure. A custom vehicle frame construction may be specified, designed and built based on a purchaser's selection. The three-dimensional structure may comprise a tab and slot panel to which additional tab and slot frame members are attached. The tab and slot frame members may have an attachment device disposed thereon for attachment of a vehicle component selected by the purchaser of the vehicle frame.

A fishing net support system includes a boat mount configured to be mounted onto a boat hull. A linkage is attached to the boat mount. A receiver can receive a pole of a fishing net. The receiver is mounted on the linkage, such that the linkage allows pivoting between the boat mount and the receiver within a vertical plane.

An airboat rudder that results in increased turning force on the airboat while also being easily controlled by the airboat driver is disclosed. Airboats can be configured to run on both water and dry ground. Many times, somewhat dry mud and some types of grass are very difficult to run over and will cause an airboat to get stuck. One way of getting an airboat free is to oscillate the one or more airboat rudders from a hard right hand turn to a hard left hand turn. Doing so creates lateral forces on the airboat from both directions at different times causing the back of the airboat to move to the side and slightly forward as well. The airboat rudder disclosed herein increases the amount of lateral force generated on the airboat without increasing the horsepower of the airboat engine, which is highly desirable.

A fishing net support system includes a boat mount configured to be mounted onto a boat hull. A linkage is attached to the boat mount. A receiver can receive a pole of a fishing net. The receiver is mounted on the linkage, such that the linkage allows pivoting between the boat mount and the receiver within a vertical plane.