 During her submerged circumnavigation voyage, she briefly stopped at Mombasa, Kenya for refueling and, in Maputo, Mozambique before making a farewell visit at Simon's Town, South Africa.After passing the Cape of Good Hope, she made another stopover at Luanda, Angola for victualing and continued her journey towards Western Europe to stopover at Toulon, France where she was greeted by the French Navy.Her final stopover was at İzmir in Turkey and submerged through the east coast of the Sea of Marmara to dock at the Gölcük Naval Shipyard which was the only facility to upgrade the "Tench"-class based computers and other electromechanical equipments.