HMS Ulster was a destroyer of the Royal Navy. Ronald John Hanson became her captain on 25 October 1944 and remained in command until 12 June 1945, so the carrier screening of the following spring was carried out under him.
On 23 March 1945 she sailed with Task Force 57. Her station was in the screen of the carriers, set against the Sakishima airfields.
On 1 April 1945 she was again with Task Force 57, this time in the screen during Okinawa. She was not sunk.
Hanson was relieved on 12 June 1945. John Trevor Kay took command that day and stayed her captain until 4 June 1946. Ulster survived the war. She was not sunk, and the hull came through.