USS Seven (SP-727) was a United States Navy patrol vessel in commission from 1917 to 1918. Seven was built for private use as a motorboat of the same name in 1917 by D. R. Shackford at Norfolk, Virginia. On 29 June 1917, the U.S. Navy acquired "Seven" directly from her builder for use as a section patrol boat during World War I. She was commissioned as USS Seven (SP-727) in 1917. Seven spent her entire career in the Hampton Roads, Virginia, area, operating as a rescue boat for flying students until shortly before the end of World War I.