SS Santa Rita was a refrigerated cargo ship built for the United States Maritime Commission by Federal Shipbuilding of Kearny, New Jersey in 1941. Operated by the Grace Line, Santa Rita en route from Cape Town to Charleston, South Carolina, when she was attacked by German submarine U-172 on 9 July 1942. Steaming on a non-evasive course at 16 knots (30 km/h) 700 nautical miles (1,300 km) northeast of Puerto Rico, a single torpedo from U-172 hit the ship in the near the engine room. The explosion destroyed the engines; opened a 30-foot (9.1 m) hole in the hull of the ship, which immediately flooded the No. 3 cargo hold; and killed one officer and two men. After ten minutes, the ship's master, Henry Stephenson, ordered the ship abandoned, although most of the surviving officers and crew and the ship's two passengers had already boarded the Nos.