Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. USS Sam Houston (SSBN-609) -  USS Sam Houston (SSBN-609/SSN-609) an Ethan Allen-class submarine was the only ship of the United States Navy to be named after Sam Houston (1793–1863) president (1836–1838 1841–1844) of the Republic of Texas. Sam Houston was the US Navy's seventh ballistic missile submarine.
Mean Of Transportation