Abstract: A hull control device is provided, which includes an error distance calculating module, an approaching speed calculating module and a command value setting module. The error distance calculating module calculates an error distance between a target position of a fixed-point hold and a ship position. The approaching speed calculating module calculates an approaching speed of a ship to the target position. The command value setting module sets a throttle command value according to a combination of the error distance and the approaching speed.

Abstract: A ship hull comprises a bottom portion having a wave piercing bow, a top portion having first and second side surfaces extending to a top deck and a substantially horizontal surface extending away from the bottom portion at a position between the bottom portion and the top portion.

Abstract: A method for maintaining the heading of a ship during movements caused by waves approaching the ship from a stern direction by activating a control surface in a bow of the ship such that the control surface converts a water flow along the bow into a lateral force that opposes roll, yaw, or heeling movements and course changes.

Abstract: A ship for use at high speed and/or heavy seas having a single long and slender hull, a sharp bow and the aft end of the hull has a flat or slightly V-shaped bottom with at least one aft rudder, and at least one propeller or water jet for propulsion whereby the foreship has a draught that is equal or more than the draught of the aft end. The bow has a control surface that converts the water flow along the forward moving ship into an adjustable lateral force.

Abstract: To measure salinity and water temperature in a marine surface layer using data obtained by a marine radar, a deviation ?S' between effect of an ocean wave on received power RSI0? in a reference time zone and effect of the ocean wave on received power RSIm? in a measurement time zone is estimated, a deviation ?s? between effect of the ocean wave on the received power RSI0? in the reference time zone and effect of the ocean wave on the received power in an electrical conductivity variable time zone is estimated, a regression function f(?) of a relationship between received power obtained by subtracting the deviation ?s? from the received power in the electrical conductivity variable time zone and electrical conductivity ? in the electrical conductivity variable time zone is estimated, and a value of electrical conductivity ?c in a measurement time zone is estimated, thereby calculating practical salinity.

Abstract: A ship comprising a hull at the bow of which an opening is formed, and on each side of said opening a recovery device designed to recover floating objects and guide them towards said opening, each recovering device comprising: a rigid vane having meshes sized so as to not allow the floating objects to pass but to allow water to pass, said vane being designed to adopt a stowed position in which it is out of the water, a collection position in which it is immersed and disposed in a plane substantially perpendicular to the direction of the advance of the ship and upstream of the opening, and a recovery position in which it is immersed and disposed in a plane substantially parallel to the direction of advance of the ship and upstream of the opening, and a control device mounted on the hull, and on which said vane is mounted, and which comprises means for ensuring the passage successively from the stowed position to the collection position and then to the recovery position and from the recovery position to the col

Abstract: The efficiency of a full form hull is improved by moving the position of the forward shoulder (3) forwards and upwards to obtain at least a partial antiphase interaction between the shoulder wave and bow wave, sufficient to prevent the bow wave from breaking at its second crest, and introducing a forwardly tapered portion (7) between the forward shoulder and the mid-body (1).

Abstract: Jet-powered water craft have become popular recreational pleasure craft for people worldwide as well as providing rapid response in a water environment for life savers, police, customs, etc. However, once the throttle has been cut there is no braking or steering mechanism for such craft. Equally such braking or steering is limited at low speeds. Accordingly it would be beneficial to provide means for braking and/or steering such jet-powered water craft under low speed operation and/or when the throttle is cut. According to embodiments of the invention such mechanisms are provided whilst providing for ease of use during operation as well as beaching/launching/storage.

Abstract: Disclosed is a tug-barge offshore cargo transport device and method, comprised of two separate elements which are removably attached: a barge and a tug boat. The barge includes a bow shaped to cut through and deflect waves, a rectangular cargo deck protected by a bulwark, compartments below the cargo deck, means for maneuvering the barge, and means at the stern of the barge for removably attaching the barge to a tug boat. The tug boat includes means at the bow to removably attach to the barge, and means to control the means for maneuvering the barge from the tug boat.

Abstract: A fore body of a ship has a bow having an upper bow portion, a lower bow portion, and a recessed bow portion between the upper bow portion and the lower bow portion. The recessed bow portion has a blunt shaped surface, curving inwards and backwards from a transition area between the upper bow portion and the recessed bow portion. The blunt shaped surface is designed to reflect smaller waves to reduce added wave resistance in smaller waves which are reflected in the recessed bow portion.

Abstract: The invention relates to an armed stealth surface vessel (1) comprising a hull (2), a deck (5, 6) and superstructures (3). The inventive vessel is equipped with sensors, transmitters, arms and, optionally, handling means. The invention is characterized in that the outer casing (4) of the deadworks comprises walls which are all inclined inwards such that the outer faces thereof are oriented upwards and form an angle that is greater than or equal to 20° with the vertical at least above a line located 5 m above the waterline and, along at least 50% of the length of the vessel, above a line located less than one meter above the waterline. The invention is also characterized in that that the essentially-vertical joint lines between two adjacent walls are inclined inwards and form an angle of more than 20° with the vertical. The invention is further characterized in that the sensors and transmitters, the arms and the handling means are concealed or can be concealed in or under the outer casing of the deadworks.

Abstract: A ship designed for use at high speed and heavy seas having a single long and slender hull with a narrow beam and a more or less vertical bow, whereby the front half of the hull has more or less vertical sides, minimal flare in the bow sections and towards the bow an increase in draught at its center line combined with a more or less similar increase of freeboard and whereby the aft end of the hull has a flat or slightly V-shaped bottom with one or more propellers and/or waterjets as propulsion means. In accordance with the invention the bow has a fillet radius of at least 1% of the beam.

Abstract: A foreship arrangement for a vessel of the displacement type, which foreship consists of the part of the ship in front of the vessel's midship mark (2) and which vessel has a transversely symmetrical hull form about its centre line (CL) and a substantially conventional bow form below its design water line (Tdwl), characterised in that the stem line (1) of the vessel turns substantially backwards in relation to the length direction of the ship from a transition point (B) at or immediately above the design water line (Tdwl).

Abstract: The hull design for this invention includes a sharp bow, deep V concave shape (“VC”) monohull with a reverse curvature running from a flat straight keel to the upper rail and also encompassing the entire hull length from the bow to the stern. The pointed bow with a bow rudder and a deep flat keel results in a smooth hull for guiding a water column free of a wave and water turbulence to the stern. A mainsail mast and a mizzen shroud slide transversely within limits to promote sail proximity and to achieve increased speed via an improved draft. The mizzen foresail is tacked by moving the mast windward; detaching the mizzen shroud; moving it forward to perform a tacking maneuver, and then moving it aft to a leeward position in relation to the mainsail; and re-attaching the mizzen mast to the moveable traveler.

Abstract: The invention relates to a ship's bow with a central inclined plane area and starboard and port catamaran-like runners laterally thereto, the inclined plane area and runners in the midships direction pass roughly into a fictional keel line. The aim is to create such a ship's bow which, whilst being very economic when operating the ship can be used in modular manner for the most varied ship types and operating zones. To this end the runners are given a wedge-like construction and at the front runner end is provided a free flow attack opening for the inclined plane area, which is constructed with a specific inclination angle ?.

Abstract: A foreship arrangement for a vessel of the displacement type. The foreship consists of the part of the ship in front of the vessel's midship mark and the vessel has a transversely symmetrical hull form about its center line and a substantially conventional bow form below its design water line, characterized in that the stem line of the vessel turns substantially backwards in relation to the length direction of the ship from a transition point at or immediately above the design water line.

Abstract: Transport ships having a relatively large structure over the water line, such as a pure car carrier, container ship and a passenger ship tend to receive the air resistance during the sailing. When sailing aslant against the wind, check helm had to be effected so far to cancel the swinging moment causing an extra increase in the underwater resistance. A low-fuel-consumption transport ship described has a structure over the water line, including a bow of a shape integral with the bridge of a hollow nearly semispherical to quarter-spherical shape or a partly cylindrical shape which is smoothly continuing to the stern to decrease the air resistance. The low-fuel-consumption transport ship further has a vertical tail incorporating a chimney and is rotatable on the uppermost stern deck to cancel the swinging moment in the air, without almost requiring check helm and, therefore, decreasing the underwater resistance.

Abstract: A combined hull and steering mechanism for a marine vessel has a substantially rectangularly-shaped upper hull joined to a lower hull that is dual-tapered from its sidewalls to both its forward and aft portions. A directional thrust steering mechanism having a pair of vertical rudder blades positioned on either side of a conventional propeller extending from the centerline of the lower hull directs the water from the propeller, thus enabling the vessel to move more efficiently and with greater maneuverability in both forward and reverse directions. The dual-tapered hull permits a significantly better flow of water to and from the propeller and steering mechanism of the vessel, particularly when operating in reverse, thereby allowing the vessel to turn 360° in its own length.

Abstract: The invention is directed to a watercraft hull design that comprises a hull having a bow, stern, top, and bottom. A wedge-shaped wave spreading system is located at a forward portion of the craft. The wave-contacting surface planes of the wave spreading system are positioned substantially perpendicular to the plane of smooth water. The bottom edge of the wave spreading system is positioned near the level of smooth water when the watercraft is at cruising speed. The wave spreading system has a forward apex which forms a substantially perpendicular or vertical leading wedge to the plane of water. Since the apex and planes of the wave spreader are substantially perpendicular to the water, oncoming waves encountered by the wave spreader will tend to be deflected horizontally. Accordingly, the watercraft will more easily “cut through” waves instead of riding over them. Located rearwardly of the wave spreader, an internal hull prow is spaced from the wave spreading system, creating an air space therebetween.

Abstract: The invention relates to a ship's bow with a central inclined plane area and starboard and port catamaran-like runners laterally thereto, the inclined plane area and runners in the midships direction pass roughly into a fictional keel line. The aim is to create such a ship's bow which, whilst being very economic when operating the ship can be used in modular manner for the most varied ship types and operating zones. To this end the runners are given a wedge-like construction and at the front runner end is provided a free flow attack opening for the inclined plane area, which is constructed with a specific inclination angle ?.

Abstract: A planing pontoon hull is described including a bow section with separate steep and shallow bow planes separated by left and right displacement guides extending upward from a planar bottom. Forward bow angle, steep deflections angles, displacement angles, and shallow planing angles are described for water movement over a range of water speeds and depths.

Abstract: A foreship arrangement for a vessel of the displacement type, which foreship consists of the part of the ship in front of the vessel's midship mark (2) and which vessel has a transversely symmetrical hull form about its centre line (CL) and a substantially conventional bow form below its design water line (Tdwl), characterised in that the stem line (1) of the vessel turns substantially backwards in relation to the length direction of the ship from a transition point (B) at or immediately above the design water line (Tdwl).

Abstract: The invention relates to a watercraft, particularly a river boat, with a hull for receiving useful devices and with propulsion units for generating a driving force and which are located on the hull. The watercraft according to the invention is characterized in that guiding elements are provided in the bow area on the underside of the hull, which have a vertical, forwardly tapering wedge shape, that the propulsion units in the bow area are set back from the wedge-shaped guiding elements, that between the guiding elements is provided a partial area of the hull constructed in the form of a horizontal wedge and that the propulsion units are pivotably mounted.

Abstract: The invention is directed to a watercraft hull design that comprises a hull having a bow, stem, top, and bottom. A wedge-shaped wave spreading system is located at a forward portion of the craft. The wave-contacting surface planes of the wave spreading system are positioned substantially perpendicular to the plane of smooth water. The bottom edge of the wave spreading system is positioned near the level of smooth water when the watercraft is at cruising speed. The wave spreading system has a forward apex which forms a substantially perpendicular or vertical leading wedge to the plane of water. Since the apex and planes of the wave spreader are substantially perpendicular to the water, oncoming waves encountered by the wave spreader will tend to be deflected horizontally. Accordingly, the watercraft will more easily “cut through” waves instead of riding over them. Located rearwardly of the wave spreader, an internal hull prow is spaced from the wave spreading system, creating an air space therebetween.

Abstract: A hull form which operates in the speed ranges where both planing and wave making affect hull resistance is presented with a configuration which reduces wave drag and improves performance in very fast and ultra-faste speed ranges. The specific distribution of immersed cross-sectional area minimizes bow wave making and optimizes the closing wake. Bow wave impedes forward motion of a hull form. Stern closing wake pushes the hull forward and enhances the forward motion. The bow sections are designed so that they have a “hollow” entrance configuration which decreases the effort to spread the water and in turn diminishes the wave making as the hull pushes through the water. The stern sections are designed to be of such a configuration that as the water spread by the bow (34) now must close in around the stern (35) of the hull, the wave height is increased so that the closing wake exerts a forward thrust on the hull.

Abstract: This invention provides an improved shape of the bow of a high speed ocean-going ship. It introduces a set of inverted and inclined surfaces that enclose the bow from above, and cause the hull to move through the waves rather than over them. These surfaces generate a downward lifting force that counteracts the displacement force. Displacement force causes a traditionally-shaped bow to lift above waves and initiate pitching movement. The new type of bow reduces or eliminates pitching movement and slamming loads on the hull, thus improving ride quality, and enabling designers to specify lighter structure under the existing rules. This in turn reduces the overall weight of the craft, enabling reduction in the power required to achieve the service speed, reduction in fuel consumption, and reduction in the associated capital and operating costs. It also improves ride quality for passengers, and reduces damage to cargo due to accelerations. 1 U.S.