She served there as tender and repair ship for landing craft until 28 March 1946 when she headed for China. Tantalus operated at Shanghai and Hankow until late July when she got underway for Okinawa. She remained in the Ryukyus from 5 August to 31 October when she began a return voyage to China.
Tantalus performed as a support vessel for landing craft until 28 March 1946, and then headed to China. The ship operated at Shanghai and Hankow until late July, after which it sailed to Okinawa. It remained in the Ryukyus from 5 August to 31 October before beginning its return trip to China.