The operation of devices for measurements and experiments in the sea requires energy for various consumers. The aim of the invention is to produce a discontinuous operation drive which is suitable for all water depths and can be charged once with the required amount of energy. Said aim is achieved, whereby a drive (1) for a working machine to be applied under water, particularly, in the deep sea, is provided, whereby the power transmission device (2) consists of a driven shaft (6), a coupled rope winch (7) with a cable (8) which can be rolled up, transmission elements and an ratchet mechanism (20), the floating body (11), at the free end of the rope, being a closed, incompressible floatation sphere (12) which can be loaded with buoyancy energy. During the lowering of the drive (1), potential energy is absorbed by means of the stopped floating body (11) and, after the placement of the drive (1), said energy may be converted into a mechanical work by a controlled release of the ratchet mechanism (20).