Abstract: The present invention relates to structured, gas-holding surfaces for improving the friction-reducing properties of gas layers held under a liquid and for the simultaneous suppression of turbulence. The present invention furthermore relates to a device comprising this structured, gas-holding surface and to the use of this structured, gas-holding surface.

Abstract: The present invention concerns a bulbous bow for a sea-going vessel, said bow comprising a load-carrying inner structure mounted at the stem of the vessel and an outer shell structure defining the hydrodynamic properties of the bulbous bow, wherein said outer shell structure is provided with a sub-structure for replaceably mounting on the inner structure. The invention further concerns a seagoing vessel comprising such bulbous bow as well as a method of producing a bulbous bow and a method of mounting or replacing a bulbous bow.

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 a ship of the displacement type with a Ramform™ hull that has a transom stern (100), a longitudinal length L in the design waterline plane (300), a base plane (400) parallel with the design waterline plane at a distance T corresponding to the design draught of the hull and including essentially sinusoidal waterlines (602), a sloping plane (200) that comprises the bottom of the after end of the ship and which extends from the transom stern (100) at the design waterline plane (300) to the base plane (400) at approximately L/2 and a bulge on each side along a considerable part of the length of the hull, terminating at the forward end of the hull ahead of the length L in a tongue-like bulb member (900).

Abstract: A stern structure of a ship includes a plurality of propellers, a plurality of propeller shafts and a stern structural body. A plurality of propeller shaft tubes is provided correspondingly to the plurality of propellers, and the plurality of propeller shafts connected to the plurality of propellers is inserted into the plurality of propeller shaft tubes. The stern structural body extends backwardly from the stern body, spreads externally with respect to a ship body center line C, and contains portions of the plurality of propeller shafts extending backwardly from the stern body. An inner side of the stern structural body is equivalent to an interior portion of a ship body. The stern structural body supports the plurality of propeller shaft tubes in the interior portion of the ship body.

Abstract: A small size floating vessel having a dual fuel system, optimized cargo capacity, and options for selectively operating on diesel fuel and natural gas for maximizing the range of vessel operation and reducing vessel emissions of nitrogen oxides and particulates.

Abstract: The invention relates to a ship of the displacement type with a Ramform™ hull that has a transom stern (100), a longitudinal length L in the design waterline plane (300), a base plane (400) parallel with the design waterline plane at a distance T corresponding to the design draught of the hull and including essentially sinusoidal waterlines (602), a sloping plane (200) that comprises the bottom of the after end of the ship and which extends from the transom stern (100) at the design waterline plane (300) to the base plane (400) at approximately L/2 and a bulge on each side along a considerable part of the length of the hull, terminating at the forward end of the hull ahead of the length L in a tongue-like bulb member (900).

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: A course-holding, high-speed, sea-going vessel having a hull which is intended to hold payloads or passengers and at least one rotatable, preferably electric, rudder propeller (POD) which is arranged gondola-like under the hull of the vessel and has, to supply it with power, at least one motor/generator unit which is arranged in the hull of the vessel, the hull of the vessel having at least in part a bottom which rises somewhat toward the two sides of the hull, and in that the front part of the hull is designed so as to stabilize the course and movement of the vessel and ending under water, in particular in a relatively slender bow with a bulb, and in that a flow-guiding element (skegg) is arranged upstream of each rudder propeller in order both to optimize the handling characteristics and to achieve an optimized flow against the rudder propeller, which has a displacement volume for the water flowing against the respective rudder propeller.