Provided is watercraft hull system, including a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a substantially V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and a substantially M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.

A system for controlling aeraulic conditions existing above an aerial arrival zone includes anemometric components and aeraulic components. The anemometric components deliver speed and bearing angle values that characterize a relative wind speed with respect to the aerial arrival zone and to a superstructure located close to the aerial arrival zone. The aeraulic components are capable of modifying air movements above the aerial arrival zone, and are controlled according to the wind speed and bearing angle values. Such a system is particularly suitable for use on board a ship able to carry a helicopter, in particular on its afterdeck.

A V-hull boat design having the engine placed forward of the longitudinal centerline offers advantages over traditional boat designs. The engine is placed forward of the longitudinal centerline of the boat and under the walking deck within the passenger cabin such that it does not interfere with the placement of passenger seating within the boat. Placement of the engine in a position forward of the longitudinal centerline of the boat moves the center of gravity of the boat forward compared with traditional I/O, V drives, and direct drives. By placing the engine forward of the longitudinal centerline, in a location that is generally not utilized in the hull of the boat, substantial passenger and cargo room is preserved in the aft half of the boat. Bow rise during acceleration is reduced; ride comfort is improved through chop or waves; and wake performance behind the boat is improved.

A mounting, positioning, and deployment system for the sonar head of a sonar survey system facilitates rapid, accurate, and repeatable alignment of the sonar head in relation to the keel of a marine vessel. Precision and stability are enhanced with refinements to a cross tube positioning apparatus, and further enhanced with an adjustable Z-pole mount and an extruded aluminum Z-pole embodied as, or encased in, a drag-reducing foil.

This relates to vessels in general, but in particular to vessel designed to be exposed from low to medium to high waves. Both for comfort of persons, animals or fragile goods, steady sailing is preferred, without causing the waves slamming in on the vessel hull or excessive pitching of the vessel. This is also the case for service and supply vessels performing operations in relation to offshore or subsea installations. To obtain a solution to the aforementioned issues the present invention provides a vessel, wherein a stern of the vessel extend below a design waterline (Tdwl), and wherein opposite side faces of the stern, when seen in an opposite direction of the vessels primary sailing direction, form an acute angle under and above the design waterline (Tdwl) to decrease the vessels displacement in the rear end and are adjoined along at a line of symmetry forming a stern centerline.

A marine vessel includes a hull assembly, and the hull assembly includes a deck assembly, a first battery assembly, a second battery assembly and an electric motor assembly. The deck assembly is contained within the hull assembly. The first battery assembly is located completely under the deck assembly. The second battery assembly is located completely under the deck assembly and is physically separate from the first battery assembly. The electric motor assembly receives electric power from the first battery assembly and the second battery assembly to propel the hull assembly through water during operation.

Provided is watercraft hull system, including a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a substantially V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and a substantially M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.

An electrical drive system for a marine vessel is provided. The system comprises an electric machine arranged below a water level, an inboard electrical energy storage system, wherein the electric machine is connected to the inboard electrical energy storage system via at least one electric cable, and at least one cable cutter arranged to cut the at least one electric cable in the event of impact.

A personal watercraft includes a watercraft body and a front bumper unit. The watercraft body includes a hull, a deck, and a gunnel line being a joint between the hull and the deck. The front bumper unit is attached to a front of the watercraft body. The front bumper unit has a front end located above and forward of the gunnel line in a side view of the watercraft body.