April and took Plaice to the Kuril Islands-Okhotsk Sea area. The first enemy contact was made on 13 May, when the submarine trailed four sea trucks and four small luggers until she opened a surface engagement with her and 40 mm guns, sinking all four sea trucks and two luggers. When all her larger ammunition had been expended, she drove the remaining two luggers toward the beach and damaged them by 20 mm and small arms fire. On 18 May, seven fishing boats came into view. The staccato of 20 mm and .50 caliber guns tore into two of the boats and damaged them visibly. Plaice ended her patrol at Pearl Harbor 13 June. The sixth patrol - commencing on 18 July - took Plaice to the East China Sea area, but she made no enemy contacts. She picked up five survivors from an Army B-25 Mitchell, and transferred them to a Navy patrol bomber the following day. On 15 August, Japan accepted the Potsdam Declaration and nine days later Plaice pulled into Midway. After the war was over, Plaice operated in the Pacific until, by directive dated November 1947, she was placed out of commission, in reserve, at Mare Island Naval Shipyard. Plaice was reactivated 18 May 1963 in preparation for a five-year loan to Brazil on 7 September 1963 under the Military Assistance Program. Brazilian Navy Capitão-de-Fragata (Commander) Abílio Simões Machado of the Brazilian Navy took command of the submarine at Pearl Harbor, Hawaii, on 7 September 1963. Commissioned in the Brazilian Navy as Bahia (S-12), she was the first Balao-class submarine to undergo alterations at the Brazilian Navy Arsenal in Rio de Janeiro; her hydrodynamic shape was modified with the installation of a new conning tower and periscope guide. After the completion of the modifications, Bahias underwater speed increased by one knot and she was quieter when submerged. Bahia took part in UNITAS naval exercises and assisted in surveillance in the South Atlantic Ocean during the Cold War. She logged 140,503 nautical miles (260,212 kilometers), spending 2,863 hours submerged and 836 days at sea. Her loan to Brazil was extended beyond its original five-year term at regular intervals. Bahia was decommissioned on 19 January 1973. She was sold to the Technology Museum of São Paulo, which intended to tow her Santos, Brazil, and convert her into a museum ship. However, these plans were not realized, and instead