Unmanned underwater vehicles (1) which can be controlled from a carrier platform (2) by an optical waveguide cable (3) can be used for widely differing missions. For mine countermeasures, the loss of the underwater vehicle (1) is often accepted, with the optical waveguide cable (3) also being destroyed by the explosion. To reduce the costs of a mission of the underwater vehicle, the invention provides for the optical waveguide cable (3) to be connected to the underwater vehicle (1) via a connecting device (4). The connecting device (4) comprises a connecting cable (8) and connecting elements (11, 12) at the ends (9, 10) of the connecting cable (8) for an optical waveguide cable (3) at one end and for an unmanned underwater vehicle (1) at the other end.