 From 20 November to 23 December, she assisted in the operations to clear the merchant sea lanes of the East China Sea and supported SAR operations among the islands off Formosa.New Year's Day 1946 found "Prevail" on the Whangpoo River at Shanghai, China, where she remained until returning to San Pedro, California, 15 February.Transferred to the San Diego Group of the Pacific Reserve Fleet on 9 April, "Prevail" decommissioned 31 May 1946.