An underwater storage installation for a cryogenic liquid. A foundation base rests directly on the sea floor. An underwater cell for storing the cryogenics liquid and cryogenic liquid-supply and -discharge conduits. The storage cell comprises a sealed outer chamber and a vapor barrier disposed inside the outer chamber and which defines a watertight space. A separation space is disposed between the outer chamber and the vapor barrier. Spacers are disposed in the space to keep the chamber and the vapor barrier at a distance from one another. The installation can be used for the storage of liquefied natural gas.

 
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