Vessel (3, 70) for transporting a cold fluid, the vessel (3, 70) comprising: a load-bearing structure comprising a hull extending in a longitudinal direction and at least one transverse cofferdam (9, 19, 29) subdividing the hull into a plurality of segments, the one or each transverse cofferdam (9, 19, 29) comprising a pair of transverse bulkheads (7, 8, 17, 107, 109) defining an internal space (13, 23) of the transverse cofferdam (9, 19, 29) and an upper wall closing said internal space (13, 23); at least one sealed and thermally insulating tank (4, 71) disposed in a segment of the hull adjacent to said transverse cofferdam (9, 19, 29); a gas management installation for managing a gaseous atmosphere in the internal space (13, 23) of the transverse cofferdam (9, 19, 29), wherein the gas management installation comprises: a dry air supply pipeline comprising a first end located outside the transverse cofferdam (9, 19, 29) and connected to a dry air generator supplying dry air, and a second end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29); an intake valve mounted on the dry air supply pipeline; a gas discharge pipeline comprising a first end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29) and a second end emerging outside the vessel (3, 70); a discharge valve (34, 134) mounted on the gas discharge pipeline, the discharge valve (34, 134) being configured to open when a relative pressure in the internal space (13, 23) rises above a first threshold value; a pressure sensor configured to detect a relative pressure in the internal space (13, 23) of the transverse cofferdam; a pressure regulator (36, 136) connected to the pressure sensor and to the intake valve, the pressure regulator (36, 136) being configured to: open the intake valve when the relative pressure in the internal space (13, 23) drops below a second threshold value, the second threshold value being a positive value lower than the first threshold value. a load-bearing structure comprising a hull extending in a longitudinal direction and at least one transverse cofferdam (9, 19, 29) subdividing the hull into a plurality of segments, the one or each transverse cofferdam (9, 19, 29) comprising a pair of transverse bulkheads (7, 8, 17, 107, 109) defining an internal space (13, 23) of the transverse cofferdam (9, 19, 29) and an upper wall closing said internal space (13, 23); at least one sealed and thermally insulating tank (4, 71) disposed in a segment of the hull adjacent to said transverse cofferdam (9, 19, 29); a gas management installation for managing a gaseous atmosphere in the internal space (13, 23) of the transverse cofferdam (9, 19, 29), wherein the gas management installation comprises: a dry air supply pipeline comprising a first end located outside the transverse cofferdam (9, 19, 29) and connected to a dry air generator supplying dry air, and a second end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29); an intake valve mounted on the dry air supply pipeline; a gas discharge pipeline comprising a first end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29) and a second end emerging outside the vessel (3, 70); a discharge valve (34, 134) mounted on the gas discharge pipeline, the discharge valve (34, 134) being configured to open when a relative pressure in the internal space (13, 23) rises above a first threshold value; a pressure sensor configured to detect a relative pressure in the internal space (13, 23) of the transverse cofferdam; a pressure regulator (36, 136) connected to the pressure sensor and to the intake valve, the pressure regulator (36, 136) being configured to: open the intake valve when the relative pressure in the internal space (13, 23) drops below a second threshold value, the second threshold value being a positive value lower than the first threshold value. a dry air supply pipeline comprising a first end located outside the transverse cofferdam (9, 19, 29) and connected to a dry air generator supplying dry air, and a second end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29); an intake valve mounted on the dry air supply pipeline; a gas discharge pipeline comprising a first end emerging into the internal space (13, 23) of the transverse cofferdam (9, 19, 29) and a second end emerging outside the vessel (3, 70); a discharge valve (34, 134) mounted on the gas discharge pipeline, the discharge valve (34, 134) being configured to open when a relative pressure in the internal space (13, 23) rises above a first threshold value; a pressure sensor configured to detect a relative pressure in the internal space (13, 23) of the transverse cofferdam; a pressure regulator (36, 136) connected to the pressure sensor and to the intake valve, the pressure regulator (36, 136) being configured to: open the intake valve when the relative pressure in the internal space (13, 23) drops below a second threshold value, the second threshold value being a positive value lower than the first threshold value.