The invention relates to a floating maritime vessel including at least one hull beneath a deck, the hull extending between a bow and a stern in a longitudinal direction of the vessel, the vessel including, on its lower part, a removable keel and, on its upper part, a conning tower erected above the deck, the keel being able to be descended below the hull and raised back through the hull, the keel including a lower end and an upper end, the upper end of the keel connecting to the hull when the keel is in its lowered position. According to the invention, the conning tower contains a keel-storage space and the keel and the keel-storage space of the conning tower are aligned such that the keel can be raised by upward translation at least partly into the keel-storage space of the conning tower.

The invention is related to boatbuilding and may be used in construction and modernisation of high-speed monohull motor seagoing boats, where a single hull is used, which is moving in a surfing on a water cushion mode. Stabilised hull of a monohull motor boat, which is using a surfing glide on a water cushion, with the deeply submerged displacement bearing blade, with a hull of a total width of not more than 50% of its length, which, in its lower part over its entire length, has a descending shape of its bottom surface in the direction bow-to-stern, where the bow is elevated up to the distance from the waterline, corresponding to at least 25% of the hull's width, and under the bow is a high wave-piercing stem. Wherein, in the front 40% of the hull's length, the bottom surface has a descending shape, which smoothly flows into the bottom surface of the stern part of the hull, and has an angle of descent in relation to the waterline at zero speed of at least 5 degrees, in the rear 60% of the hull's length, the bottom surface has a descending shape, and the angle of descent in relation to the waterline at zero speed of not more than 5 degrees, while it has an almost flat shape in its cross section, and is submerged by 70% or more of its length below the waterline, where the submerged part becomes the “surfing surface”, which is gliding, during the boat's movement, on a water cushion, and carrying not more than 70% of the boat's fully loaded weight. The hull is made with a longitudinally positioned located underneath the bottom surface, symmetrical with respect to the boat's centerline, and commensurate with its length, vertically oriented, deeply submerged displacement bearing blade of narrow shape and of low wave/hydrodynamic resistance; wherein the ratio of the length to the width of the bearing blade of at least 20 times, with the displacement of the bearing blade corresponding to 30-50% of the boat's fully loaded weight, and with its height (excluding the stem) of not less than 20% of the maximum width of the hull, wherein ensuring a deep submersion of the bottom edge of the bearing blade in relation to the waterline. The bearing blade is made with wave-piercing lines, with a high wave-piercing stem, reaching by its height the bow end of the bottom surface of the hull, with the sharp rear and front lines, and the smooth middle lines; and has a triangular cross section over its entire length, with the most acute angle at its bottom; and the maximum width of the bearing blade is located within 40-60% of its length, which determines the centre of the displacement of the bearing blade within 40-60% of its length, in its upper third. The controllable hull o

The invention is related to boatbuilding and may be used in construction and modernisation of high-speed monohull motor seagoing boats, where a single hull is used, which is moving in a surfing on a water cushion mode. Stabilised hull of a monohull motor boat, which is using a surfing glide on a water cushion, with the deeply submerged displacement bearing blade, with a hull of a total width of not more than 50% of its length, which, in its lower part over its entire length, has a descending shape of its bottom surface in the direction bow-to-stern, where the bow is elevated up to the distance from the waterline, corresponding to at least 25% of the hull's width, and under the bow is a high wave-piercing stem. Wherein, in the front 40% of the hull's length, the bottom surface has a descending shape, which smoothly flows into the bottom surface of the stern part of the hull, and has an angle of descent in relation to the waterline at zero speed of at least 5 degrees, in the rear 60% of the hull's length, the bottom surface has a descending shape, and the angle of descent in relation to the waterline at zero speed of not more than 5 degrees, while it has an almost flat shape in its cross section, and is submerged by 70% or more of its length below the waterline, where the submerged part becomes the “surfing surface”, which is gliding, during the boat's movement, on a water cushion, and carrying not more than 70% of the boat's fully loaded weight. The hull is made with a longitudinally positioned located underneath the bottom surface, symmetrical with respect to the boat's centerline, and commensurate with its length, vertically oriented, deeply submerged displacement bearing blade of narrow shape and of low wave/hydrodynamic resistance; wherein the ratio of the length to the width of the bearing blade of at least 20 times, with the displacement of the bearing blade corresponding to 30-50% of the boat's fully loaded weight, and with its height (excluding the stem) of not less than 20% of the maximum width of the hull, wherein ensuring a deep submersion of the bottom edge of the bearing blade in relation to the waterline. The bearing blade is made with wave-piercing lines, with a high wave-piercing stem, reaching by its height the bow end of the bottom surface of the hull, with the sharp rear and front lines, and the smooth middle lines; and has a triangular cross section over its entire length, with the most acute angle at its bottom; and the maximum width of the bearing blade is located within 40-60% of its length, which determines the centre of the displacement of the bearing blade within 40-60% of its length, in its upper third. The controllable hull o

A watercraft includes a hull having a lengthwise-extending keel and a transom extending perpendicularly to the keel about an aft end of the hull. An electrically-powered propulsion pod is engaged with the hull on opposite sides of the keel. A single control unit is in communication with the propulsion pods, wherein the single control unit is arranged to interact with the propulsion pods to control steering, direction, and velocity of the hull. An associated method of forming a watercraft is also provided.

A watercraft includes a hull having a lengthwise-extending keel and a transom extending perpendicularly to the keel about an aft end of the hull. An electrically-powered propulsion pod is engaged with the hull on opposite sides of the keel. A single control unit is in communication with the propulsion pods, wherein the single control unit is arranged to interact with the propulsion pods to control steering, direction, and velocity of the hull. An associated method of forming a watercraft is also provided.

The invention is related to boatbuilding and may be used in construction and modernisation of high-speed monohull motor seagoing boats, where a single hull is used, which is moving in a surfing on a water cushion mode.

Stabilised hull of a monohull motor boat, which is using a surfing glide on a water cushion, with the deeply submerged displacement bearing blade, with a hull of a total width of not more than 50% of its length, which, in its lower part over its entire length, has a descending shape of its bottom surface in the direction bow-to-stern, where the bow is elevated up to the distance from the waterline, corresponding to at least 25% of the hull's width, and under the bow is a high wave-piercing stem. Wherein, in the front 40% of the hull's length, the bottom surface has a descending shape, which smoothly flows into the bottom surface of the stern part of the hull, and has an angle of descent in relation to the waterline at zero speed of at least 5 degrees, in the rear 60% of the hull's length, the bottom surface has a descending shape, and the angle of descent in relation to the waterline at zero speed of not more than 5 degrees, while it has an almost flat shape in its cross section, and is submerged by 70% or more of its length below the waterline, where the submerged part becomes the “surfing surface”, which is gliding, during the boat's movement, on a water cushion, and carrying not more than 70% of the boat's fully loaded weight.

The hull is made with a longitudinally positioned located underneath the bottom surface, symmetrical with respect to the boat's centerline, and commensurate with its length, vertically oriented, deeply submerged displacement bearing blade of narrow shape and of low wave/hydrodynamic resistance; wherein the ratio of the length to the width of the bearing blade of at least 20 times, with the displacement of the bearing blade corresponding to 30-50% of the boat's fully loaded weight, and with its height (excluding the stem) of not less than 20% of the maximum width of the hull, wherein ensuring a deep submersion of the bottom edge of the bearing blade in relation to the waterline. The bearing blade is made with wave-piercing lines, with a high wave-piercing stem, reaching by its height the bow end of the bottom surface of the hull, with the sharp rear and front lines, and the smooth middle lines; and has a triangular cross section over its entire length, with the most acute angle at its bottom; and the maximum width of the bearing blade is located within 40-60% of its length, which determines the centre of the displacement of the bearing blade within 40-60% of its length, in its upper third.

The cont

The invention is related to boatbuilding and may be used in construction and modernisation of high-speed monohull motor seagoing boats, where a single hull is used, which is moving in a surfing on a water cushion mode.

Stabilised hull of a monohull motor boat, which is using a surfing glide on a water cushion, with the deeply submerged displacement bearing blade, with a hull of a total width of not more than 50% of its length, which, in its lower part over its entire length, has a descending shape of its bottom surface in the direction bow-to-stern, where the bow is elevated up to the distance from the waterline, corresponding to at least 25% of the hull's width, and under the bow is a high wave-piercing stem. Wherein, in the front 40% of the hull's length, the bottom surface has a descending shape, which smoothly flows into the bottom surface of the stern part of the hull, and has an angle of descent in relation to the waterline at zero speed of at least 5 degrees, in the rear 60% of the hull's length, the bottom surface has a descending shape, and the angle of descent in relation to the waterline at zero speed of not more than 5 degrees, while it has an almost flat shape in its cross section, and is submerged by 70% or more of its length below the waterline, where the submerged part becomes the “surfing surface”, which is gliding, during the boat's movement, on a water cushion, and carrying not more than 70% of the boat's fully loaded weight.

The hull is made with a longitudinally positioned located underneath the bottom surface, symmetrical with respect to the boat's centerline, and commensurate with its length, vertically oriented, deeply submerged displacement bearing blade of narrow shape and of low wave/hydrodynamic resistance; wherein the ratio of the length to the width of the bearing blade of at least 20 times, with the displacement of the bearing blade corresponding to 30-50% of the boat's fully loaded weight, and with its height (excluding the stem) of not less than 20% of the maximum width of the hull, wherein ensuring a deep submersion of the bottom edge of the bearing blade in relation to the waterline. The bearing blade is made with wave-piercing lines, with a high wave-piercing stem, reaching by its height the bow end of the bottom surface of the hull, with the sharp rear and front lines, and the smooth middle lines; and has a triangular cross section over its entire length, with the most acute angle at its bottom; and the maximum width of the bearing blade is located within 40-60% of its length, which determines the centre of the displacement of the bearing blade within 40-60% of its length, in its upper third.

The cont

Catamaran boat hulls are described having sponsons, an underside tunnel surface between sponsons, two longitudinal steps disposed across each sponson's keel, and two transverse steps disposed lengthwise on opposing sides of each sponson's keel. The longitudinal steps for a sponson have a profile with a curved longitudinal step portion on the opposing outer edges with an outer edge portion of that curved longitudinal step portion being further away from the sponson's aft section, and an inward step edge offset where each of the two longitudinal steps meets a hull side of the sponson. The transverse steps help define variable deadrise inner lifting pad running portion with a lower deadrise aft transitioning to a higher deadrise forward. Spray rails protruding off the aft end of an underside wave splitter and away from the boat hull's centerline help manage undesired spray and use of radiused chines enhances lift and landing performance.

Catamaran boat hulls are described having sponsons, an underside tunnel surface between sponsons, two longitudinal steps disposed across each sponson's keel, and two transverse steps disposed lengthwise on opposing sides of each sponson's keel. The longitudinal steps for a sponson have a profile with a curved longitudinal step portion on the opposing outer edges with an outer edge portion of that curved longitudinal step portion being further away from the sponson's aft section, and an inward step edge offset where each of the two longitudinal steps meets a hull side of the sponson. The transverse steps help define variable deadrise inner lifting pad running portion with a lower deadrise aft transitioning to a higher deadrise forward. Spray rails protruding off the aft end of an underside wave splitter and away from the boat hull's centerline help manage undesired spray and use of radiused chines enhances lift and landing performance.

Catamaran boat hulls are described having sponsons, an underside tunnel surface between sponsons, two longitudinal steps disposed across each sponson's keel, and two transverse steps disposed lengthwise on opposing sides of each sponson's keel. The longitudinal steps for a sponson have a profile with a curved longitudinal step portion on the opposing outer edges with an outer edge portion of that curved longitudinal step portion being further away from the sponson's aft section, and an inward step edge offset where each of the two longitudinal steps meets a hull side of the sponson. The transverse steps help define variable deadrise inner lifting pad running portion with a lower deadrise aft transitioning to a higher deadrise forward. Spray rails protruding off the aft end of an underside wave spitter and away from the boat hull's centerline help manage undesired spray and use of radiused chines enhances lift and landing performance.