Mobile system for operation in particular in a technical facility, comprising at least one sensor (1, 2) for detecting obstacles and for detecting outlines of objects, and a safety-related control system configured to generate a warning message if the at least one sensor (1, 2) detects an obstacle in a defined protective zone (21, 22), characterised in that the mobile system can be operated in a standard mode having a standard protective zone that has a standard width in a transverse direction, and in that the mobile system can be operated in a special mode having a special protective zone that has a special width in the transverse direction, the special width being less than the standard width, and in that the mobile system comprises a prediction unit for predicting a predetermined outline of an object, and a comparison unit for comparing an outline predicted by the prediction unit with an outline detected by the at least one sensor (1, 2), and in that switching from the standard mode to the special mode is provided for when the comparison unit establishes that an outline predicted by the prediction unit matches an outline detected by the at least one sensor (1, 2), in particular within the standard protective zone, and in that switching from the special mode to the standard mode is provided for when the predetermined outline of the object is no longer detected by the at least one sensor (1, 2), and in that the mobile system is operated in the special mode at a defined special speed, and in that after the mode is switched from the special mode to the standard mode, the mobile system is briefly operated at a speed that is less than the special speed, and in that before the mode is switched from the special mode to the standard mode, the mobile system is operated at a speed that is greater than the special speed. a safety-related control system configured to generate a warning message if the at least one sensor (1, 2) detects an obstacle in a defined protective zone (21, 22), characterised in that the mobile system can be operated in a standard mode having a standard protective zone that has a standard width in a transverse direction, and in that the mobile system can be operated in a special mode having a special protective zone that has a special width in the transverse direction, the special width being less than the standard width, and in that the mobile system comprises a prediction unit for predicting a predetermined outline of an object, and a comparison unit for comparing an outline predicted by the prediction unit with an outline detected by the at least one sensor (1, 2), and in that switching from the standard mode to the special mode is provided for when the comparison unit establishes that an outline predicted by the prediction unit matches an outline detected by the at least one sensor (1, 2), in particular within the standard protective zone, and in that switching from the special mode to the standard mode is provided for when the predetermined outline of the object is no longer detected by the at least one sensor (1, 2), and in that the mobile system is operated in the special mode at a defined special speed, and in that after the mode is switched from the special mode to the standard mode, the mobile system is briefly operated at a speed that is less than the special speed, and in that before the mode is switched from the special mode to the standard mode, the mobile system is operated at a speed that is greater than the special speed.