Answer the following question: USS R-15 (SS-92) - USS R-15 (SS-92) 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 30 April 1917. She was launched on 12 October 1917 sponsored by Mrs. Thales S. Boyd and commissioned on 27 July 1918 with Lieutenant Thales S. Boyd in command. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Mean Of Transportation