A group of Russian Northern Fleet ships headed by the heavy aircraft-carrying cruiser Admiral Kuznetsov left their base to carry out tasks in the Atlantic and the Mediterranean, the Russian Navy commander's aide Igor Dygalo told Itar-Tass. The group of Northern Fleet warships the heavy aircraft-carrying cruiser "Soviet Union Fleet Admiral Kuznetsov", the big antisubmarine ship Admiral Levchenko and two support vessels left the main Northern Fleet base of Severomorsk and headed for the Atlantic and the Mediterranean Sea, he said. The trip of the warships will last for several months. In accordance with the training plan, the ships will carry out set tasks and visit several ports of European and Mediterranean states, the navy commander's aide added.