慶良間諸島
At Ulithi, "Petrof Bay" was assigned to Task Unit 52.1.2, under the command of Rear Admiral Felix Stump, in preparation for the Battle of Okinawa. She departed on 21 March, escorting Task Group 54.1 en route. Upon arriving, on March 26, "Petrof Bay" covered the Marines that landed on the Kerama Islands as a preliminary for the main battle. On March 31, she also provided support for the Marines landing on Keise Shima, a small archipelago of islets to the west of Naha. On 1 April, the main landings on Okinawa took place, and aircraft from "Petrof Bay" provided close air support every step of the way.