 Following initial commissioning, "Poseidon" steamed south to Baltimore, Maryland, where she decommissioned and completed conversion to a landing craft repair ship.Commissioned in full 13 February 1945, she completed shakedown in Chesapeake Bay and, assigned to ServRon 10, sailed for Ulithi, thence, in early June, to Okinawa.There, at Kerama Retto and at Buckner Bay, she repaired landing and patrol craft until the cessation of hostilities.