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.