The tank for storing gas at high pressure, such as a tank for a vehicle running on gas, comprises a confinement volume accessible via coupling means and defined by a duct disposed in a spiral coil so that the substantially rectilinear main portions of the duct bear against one another. The solder bumps are arranged in two rows along the periphery of the semiconductor device. In an emergency, the ladder is deployed by partially unwrapping the cover to a first state which allows an attaching member to be removed and placed over a window sill. A voltage output indicator device is coupled to the first and second electrical contacts.