OBS_VALUE: The concept of Gesamthafenbetrieb is a contractual union of the employer associations of the port handling companies of a harbour with the dock worker unions of that harbour. The Gesamthafenbetrieb serves as employer in virtually all aspects of the running of a harbour. Thus, all service providers are united and cover the whole port area with their expertise.Gesamthafenbetriebs-Gesellschaft Hamburg:http://www.gesamthafen.de/