The invention is characterized in that the first watertight wall does not extend only in a transversal direction but also in the longitudinal direction so as to provide the first compartment with a first longitudinally extending portion that extends into the second compartment, wherein the first longitudinally extending portion is arranged at a first distance from a first side of the ship, and wherein the first distance is greater than a width or depth of a theoretical damage according to standard requirements for the type of ship concerned. (EN) The invention concerns a ship, said ship comprising a lower deck, such as a tank top, and an upper deck, such as a bulkhead deck, arranged above the lower deck, said lower and upper decks extending in a longitudinal direction of the ship, wherein the lower deck is provided with watertight walls (bulkheads) that extend vertically between the lower and the upper deck and define a plurality of separated watertight compartments distributed between the upper and lower decks, and wherein a first of said watertight walls extends in a transversal manner from side to side of the ship so as to separate two longitudinally adjacent first and second compartments.