In 1931, Utah was demilitarized and converted into a target ship and re-designated as AG-16, in accordance with the terms of the London Naval Treaty signed the previous year. She was also equipped with numerous anti-aircraft guns of different types to train gunners for the fleet. She served in these two roles for the rest of the decade, and late 1941 found the ship in Pearl Harbor. She was in port on the morning of 7 December, and in the first minutes of the Japanese attack on Pearl Harbor, was hit by two torpedoes, which caused serious flooding. Utah quickly rolled over and sank; 58 men were killed, but the vast majority of her crew were able to escape. The wreck remains in the harbor, and in 1972, a memorial was erected near the ship.