USS Sotoyomo (ATR-43/ATA-121) was a rescue tug of the United States Navy that served during World War II and the early 1950s, and was sold to Mexico in 1963. The ship was laid down on 7 September 1942 at Orange, Texas, by the Levingston Shipbuilding Co., launched on 19 October 1942, and commissioned on 29 May 1943 as USS ATR-43.