Abstract: A method for optically acquiring a wind turbine for monitoring purposes with the aid of an aircraft, in particular a manned or unmanned rotorcraft, which has at least one camera installed thereon, wherein the wind turbine comprises a plurality of rotor blades, the surface of which is scanned within the scope of the method.

Abstract: A method for optically acquiring a wind turbine for monitoring purposes with the aid of an aircraft, in particular a manned or unmanned rotorcraft, which has at least one camera installed thereon, wherein the wind turbine comprises a plurality of rotor blades, the surface of which is scanned within the scope of the method.

Abstract: In the present state of the art, digital dictation machines with interchangeable semiconductor stores in the form of chip cards are known. The present invention describes a dictation system consisting of a mobile and stationary dictation machines in which the unauthorized listening-into dictated items is prevented by a code lock. The special nature of the coding of the machine and the code exchange between the chip card and the dictation machine is disclosed in particular. The code for a given machine configuration is established from a central reproduction station.