Abstract: The invention relates to a method and a system for sweeping marine mines having a magnetic sensor. According to the method spaced electrodes (10, 11, 13) are towed by a vessel (12) and the electrodes (10, 11, 13) are supplied with electric current from the vessel (12) so as to set up a magnetic field in the water surrounding the electrodes. At least three electrodes are utilized in the sweeping, and each electrode is supplied with electric current individually, the strength of which can be controlled. The system comprises a power source arranged on the vessel so as to generate current for the electrodes. The power source allows individually supply and control of the current to each of the electrodes.