The method consists in dropping the assembly on the seabed by ballasting the capsule(steps a, b, c, d); then in controlling (step e) the release of the probe by placing the capsule (8).

The device also has a condenser, designed to condense steam that has been used in the impulse turbine.

At each moment, the tank is at an equal pressure, all the chambers of a same housing are at a same stage of the thermodynamic cycle, with the machine carrying out two cycles per revolution of the displacer in the present embodiment.