ACCUMULATOR
The present invention provides an underwater-based accumulator system comprising at least one accumulator unit adapted to extract energy from a driving medium in the form of a liquid received in an inlet (13) at a pressure approximately equal to ambient water pressure, and to utilize it. the energy to pressurize hydraulic fluid stored in the accumulator unit so that this hydraulic fluid, at any depth beyond a defined minimum depth, can be delivered via an outlet (8) with a desired overpressure relative to ambient pressure.