USS F. Mansfield and Sons Co. (SP-691)

USS F. Mansfield and Sons Co. (SP-691), also written as USS F. Mansfield & Sons Co., as USS Mansfield and Sons Co., and as USS Mansfield & Sons Co., was a United States Navy patrol vessel in commission from 1917 to 1919.

F. Mansfield and Sons Co. was built as a commercial fishing vessel of the same name. The U.S. Navy acquired her in 1917 for use as a section patrol vessel in World War I. She apparently was commissioned that year as USS F. Mansfield and Sons Co. (SP-691).

Little information is available regarding F. Mansfield and Sons Co.'s naval career, but she apparently saw active naval service along the United States East Coast into July 1919 and then was ordered to new duties in the Panama Canal Zone, because records show that the patrol vessel, minesweeper, and tug USS Breakwater (SP-681) was assigned to service at Coco Solo in the Canal Zone on 15 July 1919 and received orders that day to assemble at Cape May, New Jersey, with F. Mansfield and Sons Co. and the patrol vessel USS SP-467 at "the earliest practicable date and when ready proceed in company by Canal Zone to assigned stations." No other record of F. Mansfield and Sons Co.'s U.S. Navy service is available.

F. Mansfield and Sons Co. apparently left naval service later in 1919.