Electrical, electronic, optical and mechanical devices to determine the geographical coordinates of pipelines, utilizing marine, photo, movie, right-of-way, rescue, training, optical, survey, surveillance, scientific methods; Electrical, electronic, optical, and mechanical devices for the location of cleaning and inspection machines in a pipeline, in particular, by low-frequency signals or magnetic signals; Electrical, electronic, optical and mechanical devices to determine the geometry of pipelines of all types; Electrical, electronic, optical and mechanical devices for measuring the free span and change in the weight-lining of an off-shore pipeline; Electrical, electronic, optical, magnetic, acoustic and mechanical devices for examining metal loss and cracks in pipelines, in particular on the inner and outer pipe wall; Electrical, electronic, optical, magnetic, acoustic and mechanical devices for the inspection and monitoring of storage tanks, in particular for inspection of the tank bottom and the outer tank shell; Electrical, electronic, optical, magnetic, acoustic and mechanical devices for inspection of smaller diameter pipelines in particular high-pressure steel pipes; Electrical, electronic, optical, magnetic, acoustic and mechanical devices for recording and playback of audio and visual information, in particular transmitted by or to a pipeline inspection device from the inside of the pipeline or the outside of the pipeline; microprocessors, microcontrollers, data-acquisition devices, and computers for detecting and evaluating the inspection data of pipelines of all types as well as microprocessor, microcontroller data acquisition devices and computer programs for this purpose, and computer programs for evaluation of the inspection data of pipelines of all types, and computer programs for storing and administering the inspection data of pipelines of all types; data carriers, such as volatile and non-volatile storage mediums, in particular with data and with computer programs for evaluating the inspection data of pipelines of all types, as well as computer programs for storing and administering the inspection data of pipelines of all types.