Pleasure craft, comprising: - a hull, including a bow, a stern, a symmetry plane and two flanks (3c, 3d) connecting said bow to said stern on opposite sides of said hull relative to the symmetry plane; - a deck substantially perpendicular to the symmetry plane; - a superstructure arranged on said deck, the outer perimeter of said superstructure comprising a first lateral wall extending over a first flank of said hull in a direction substantially parallel to the symmetry plane of said craft and is substantially aligned with said first flank of said hull, a first transverse wall extending from the end of said first lateral wall facing towards the bow in a plane substantially transverse to the symmetry plane of said craft, a second transverse wall extending from the end of said first lateral wall facing towards the stern in a plane substantially transverse to the symmetry plane of said craft, and a second lateral wall connecting the ends of said first and second transverse walls (7a, 7b) opposite to the ends thereof connected to said first lateral wall, wherein the width (W') between said first and said second lateral walls (7c, 7d) of said superstructure along an axis perpendicular to the symmetry plane is smaller than the width between said first and said second flanks (3c, 3d) of said hull along the same axis, a lateral passageway being thus defined between said second lateral wall of said superstructure and said second flank of said hull, wherein the width along an axis perpendicular to the symmetry plane of at least said first transverse wall of the superstructure is smaller than the maximum width (W") between said first and said second lateral walls (7c, 7d) of said superstructure, characterized in that at least one bulkhead is arranged on said deck, said bulkhead comprising at least a first wall extending from said second flank of said hull and being substantially coplanar with said first transverse wall of said superstructure, wherein said first wall of said bulkhead has such a width along an axis perpendicular to said symmetry plane that the distance (d) of the end of said first wall of said bulkhead adjacent to said first transverse wall from said symmetry plane is equal to or smaller than the maximum distance (d') of said second lateral wall of said superstructure from said symmetry plane, and in that said transverse walls (7a, 7b) and said lateral walls (7c, 7d) of said superstructure all have the same height and wherein the height of said first wall of said bulkhead is substantially the same as the height of said walls (7a - 7d) of said superstructure. - a hull, including a bow, a stern, a symmetry plane and two flanks (3c, 3d) connecting said bow to said stern on opposite sides of said hull relative to the symmetry plane; - a deck substantially perpendicular to the symmetry plane; - a superstructure arranged on said deck, the outer perimeter of said superstructure comprising a first lateral wall extending over a first flank of said hull in a direction substantially parallel to the symmetry plane of said craft and is substantially aligned with said first flank of said hull, a first transverse wall extending from the end of said first lateral wall facing towards the bow in a plane substantially transverse to the symmetry plane of said craft, a second transverse wall extending from the end of said first lateral wall facing towards the stern in a plane substantially transverse to the symmetry plane of said craft, and a second lateral wall connecting the ends of said first and second transverse walls (7a, 7b) opposite to the ends thereof connected to said first lateral wall, wherein the width (W') between said first and said second lateral walls (7c, 7d) of said superstructure along an axis perpendicular to the symmetry plane is smaller than the width between said first and said second flanks (3c, 3d) of said hull along the same axis, a lateral passageway being thus defined between said second lateral wall of said superstructure and said second flank of said hull, wherein the width along an axis perpendicular to the symmetry plane of at least said first transverse wall of the superstructure is smaller than the maximum width (W") between said first and said second lateral walls (7c, 7d) of said superstructure, characterized in that at least one bulkhead is arranged on said deck, said bulkhead comprising at least a first wall extending from said second flank of said hull and being substantially coplanar with said first transverse wall of said superstructure, wherein said first wall of said bulkhead has such a width along an axis perpendicular to said symmetry plane that the distance (d) of the end of said first wall of said bulkhead adjacent to said first transverse wall from said symmetry plane is equal to or smaller than the maximum distance (d') of said second lateral wall of said superstructure from said symmetry plane, and in that said transverse walls (7a, 7b) and said lateral walls (7c, 7d) of said superstructure all have the same height and wherein the height of said first wall of said bulkhead is substantially the same as the height of said walls (7a - 7d) of said superstructure.