From 3 November to 1 December 1952, "Thompson" operated in Wonsan harbor, as part of the United Nations blockade forces there. As such, she was in range of communist guns on many occasions. The object of enemy fire at least four times, "Thompson" received damage for the third time when straddled on 20 November 1952, while acting as gunfire support ship for which was conducting a sweep of the inner harbor. From three widely spaced points enemy guns took the minesweepers under fire, catching "Thompson" amidships on the starboard side as she was laying clouds of oily black smoke between "Kite" and the shoreline.