Vessel having an improved hull shape

Abstract

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.

1 . A displacement type vessel comprising a rear end arrangement for reducing wave impact loads on the vessel, which rear end consists of the part of the vessel backwards from the vessel's midship mark, when seen in the vessels primary sailing direction, and which vessel has a transversely symmetrical hull shape about its center line (CL), wherein a stern ( 11 ) of the vessel extend below a design waterline (Tdwl), and wherein opposite side faces ( 14 ,  15 ) of the stern ( 11 ), 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 ( 16 ), wherein the stern centerline of the vessel above the design water line (Tdwl) has a non-concave shape and is sloped forwards in the vessels primary sailing direction, and wherein a vessel bottom ( 17 ) of the rear end arrangement conforms to an engine driven propulsion system ( 18 ).