Patent ID: 9003989
Filing Date: 2015-04-14
Classification: B63B,Y02T

Abstract:
1. A ship comprising a full form hull, steering means, and propulsion means, and having a service speed, a length between perpendiculars (LPP), a length axis, and a section area defined as the transverse sectional area of the hull below the waterline in a design condition, the submerged portion of the hull in the design condition comprising a forebody portion, an afterbody portion, and a midbody portion of maximum section area arranged between the forebody portion and the afterbody portion, the forebody portion comprising a bow and a forward shoulder aft of the bow, the forward shoulder positioned to give a phase difference of at least 40 degrees between a shoulder wave generated by the shoulder and a bow wave generated by the bow at the service speed, the midbody and forebody portions having substantially positive curvature as represented on a section area curve of the hull; characterised in that the forebody portion includes a forwardly tapered portion arranged between the forward shoulder and the midbody portion.