High Quality Content by WIKIPEDIA articles! USS R-16 (SS-93) was an R-class coastal and harbor defense submarine of the United States Navy. Her keel was laid down by the Union Iron Works in San Francisco, California, on 26 April 1917. She was launched on 15 December 1917 sponsored by Mrs. Edward R. Wilson, and commissioned on 5 August 1918 with Lieutenant Commander Cecil Y. Johnston in command.