A ship containment system for storing and/or transporting liquefied hydrogen, which system comprises a spherical cargo tank arrangement within the ship's hull, wherein (a) the cargo tank is supported by a skirt arrangement mounted on the hull of the ship through which the tank is mounted in the ship without direct contact between outer layer of the cargo tank and the hull, with hold spaces between the cargo tank and the hull, and comprising a structural transition joint between the upper part of the skirt and the lower part of the skirt; and which system is further provided with (b) a pump for loading and discharging the liquefied gas located in a pump tower; (c) a tank cover; (d) a cargo tank insulation layer that is applied to the outer layer of the cargo tank; wherein: - the inner side of the ship's hull is provided with an insulation layer, covered by an internal lining at the side of the hold spaces, being any suitable foil at the vertical sides of the inner hull, and at the sides below the cargo tank on the bottom of the ship's hull structure being a membrane showing minimal expansion and/or contraction under the conditions applied; - the hold spaces are filled with an inert gas and are provided with means for managing pressure and means for monitoring temperature; - the skirt is mounted on the hull structure with a mounting setup that comprises a insulating layer in between the skirt and the inner side of the inner hull; and - the tank cover is provided with an internal insulation layer. (a) the cargo tank is supported by a skirt arrangement mounted on the hull of the ship through which the tank is mounted in the ship without direct contact between outer layer of the cargo tank and the hull, with hold spaces between the cargo tank and the hull, and comprising a structural transition joint between the upper part of the skirt and the lower part of the skirt; and which system is further provided with (b) a pump for loading and discharging the liquefied gas located in a pump tower; (c) a tank cover; (d) a cargo tank insulation layer that is applied to the outer layer of the cargo tank; wherein: - the inner side of the ship's hull is provided with an insulation layer, covered by an internal lining at the side of the hold spaces, being any suitable foil at the vertical sides of the inner hull, and at the sides below the cargo tank on the bottom of the ship's hull structure being a membrane showing minimal expansion and/or contraction under the conditions applied; - the hold spaces are filled with an inert gas and are provided with means for managing pressure and means for monitoring temperature; - the skirt is mounted on the hull structure with a mounting setup that comprises a insulating layer in between the skirt and the inner side of the inner hull; and - the tank cover is provided with an internal insulation layer. - the inner side of the ship's hull is provided with an insulation layer, covered by an internal lining at the side of the hold spaces, being any suitable foil at the vertical sides of the inner hull, and at the sides below the cargo tank on the bottom of the ship's hull structure being a membrane showing minimal expansion and/or contraction under the conditions applied; - the hold spaces are filled with an inert gas and are provided with means for managing pressure and means for monitoring temperature; - the skirt is mounted on the hull structure with a mounting setup that comprises a insulating layer in between the skirt and the inner side of the inner hull; and - the tank cover is provided with an internal insulation layer.