A functionalised ship (1, 2) consisted of a base ship and a removable module (3, 30), the base ship comprising a system for adapting a removable module and a removable module being installed into said system for adapting the base ship to form the functionalised ship, the functionalised ship being extended longitudinally between a bow on the front and a stern on the rear and comprising at least one deck, one shell and propelling means, the shell being symmetrical with respect to a longitudinal vertical sagittal plane, the submerged lower face of the shell defining towards the front a front hull portion and defining towards the rear a rear hull portion, in which base ship, the rear hull portion is consisted of two parts assembled together, a sagittal hull part of the base ship and a U-shaped hull part, having a U-shape in vertical view, the U-shaped hull part being in continuity with the front hull portion, the two legs of the U defining two rear lateral shell parts, the two rear lateral shell parts being closed on the rear by two lateral tables, the sagittal hull part of the base ship being arranged between the two legs of the U of the U-shaped hull part, and in which base ship, the rear part of the ship comprises, towards the top, two rear lateral deck parts topping the two rear lateral shell parts, in which base ship, the two rear lateral deck parts, the two rear lateral shell parts and the two lateral tables delimit two rear lateral volumes of the base ship, the module (3, 30) being inserted and secured between the two rear lateral volumes of the base ship to form the functionalised ship, the module having a lower face, the lower face of the module forming a sagittal hull part of the functionalised ship, in which functionalised ship, the module is removable and can be replaced by another module, the modules allowing the launching to water and the recovery on the ship, for the storage thereof out of water, of a marine or underwater drone, the floating or diving drone being able to dock in said module (3, 30), and wherein the module allowing the launching to water and the recovery on the ship of a drone is U-shaped in vertical view, said module (3, 30) being open towards the rear, the top and at least in part towards the bottom to delimit, when said module is inserted in the base ship, a longitudinal sagittal manoeuvring area towards the rear of the ship and that is open to the rear of the ship and submerged at least in part, in such a way that a floating drone can enter into said module to dock in the manoeuvring area or exit therefrom, the floating drone docking and exiting through the rear of the ship and in such a way that the drone can be launched to water and recovered from the ship by passing through the manoeuvring area. the base ship comprising a system for adapting a removable module and a removable module being installed into said system for adapting the base ship to form the functionalised ship, the functionalised ship being extended longitudinally between a bow on the front and a stern on the rear and comprising at least one deck, one shell and propelling means, the shell being symmetrical with respect to a longitudinal vertical sagittal plane, the submerged lower face of the shell defining towards the front a front hull portion and defining towards the rear a rear hull portion, in which base ship, the rear hull portion is consisted of two parts assembled together, a sagittal hull part of the base ship and a U-shaped hull part, having a U-shape in vertical view, the U-shaped hull part being in continuity with the front hull portion, the two legs of the U defining two rear lateral shell parts, the two rear lateral shell parts being closed on the rear by two lateral tables, the sagittal hull part of the base ship being arranged between the two legs of the U of the U-shaped hull part, and in which base ship, the rear part of the ship comprises, towards the top, two rear lateral deck parts topping the two rear lateral shell parts, in which base ship, the two rear lateral deck parts, the two rear lateral shell parts and the two lateral tables delimit two rear lateral volumes of the base ship, the module (3, 30) being inserted and secured between the two rear lateral volumes of the base ship to form the functionalised ship, the module having a lower face, the lower face of the module forming a sagittal hull part of the functionalised ship, in which functionalised ship, the module is removable and can be replaced by another module, the modules allowing the launching to water and the recovery on the ship, for the storage thereof out of water, of a marine or underwater drone, the floating or diving drone being able to dock in said module (3, 30), and wherein the module allowing the launching to water and the recovery on the ship of a drone is U-shaped in vertical view, said module (3, 30) being open towards the rear, the top and at least in part towards the bottom to delimit, when said module is inserted in the base ship, a longitudinal sagittal manoeuvring area towards the rear of the ship and that is open to the rear of the ship and submerged at least in part, in such a way that a floating drone can enter into said module to dock in the manoeuvring area or exit therefrom, the floating drone docking and exiting through the rear of the ship and in such a way that the drone can be launched to water and recovered from the ship by passing through the manoeuvring area.