- References
{{Use dmy dates|date=November 2012}}{{Infobox ship image| Ship image= | Ship caption=
}}{{Infobox Ship Career | Hide header= | Ship country=United States | 1917}} | Ship name=USS Ensign | Ship namesake=Previous name retained | Ship owner= | Ship operator= | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder= | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched= | Ship sponsor= | Ship christened= | Ship completed=1914 | Ship acquired=1917 | Ship commissioned=17 September 1917 | Ship recommissioned= | Ship decommissioned= | Ship maiden voyage= | Ship in service= | Ship out of service= | Ship renamed= | Ship reclassified= | Ship refit= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification= | Ship motto= | Ship nickname= | Ship honours= | Ship honors= | Ship captured= | Ship fate=Returned to owner 30 January 1919 | Ship status= | Ship notes=Operated as private motorboat Ensign 1914-1917 and from 1919 | Ship badge=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class= | Ship type=Patrol vessel | Ship tonnage= | Ship displacement= | Ship tons burthen= | 68|ft|m|abbr=on}} | 11|ft|5|in|m|abbr=on}} | Ship height= | Ship draught= | 4|ft|9|in|m|abbr=on}} | Ship depth= | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship power= | Ship propulsion= | Ship sail plan= | Ship speed=9 knots | Ship range= | Ship endurance= | Ship test depth= | Ship boats= | Ship capacity= | Ship troops= | Ship complement=9 | Ship crew= | Ship time to activate= | Ship sensors= | Ship EW= | Ship armament= | Ship armour= | Ship armor= | Ship aircraft= | Ship aircraft facilities= | Ship notes=
}} | USS Ensign (SP-1051) was a United States Navy patrol vessel in commission from 1917 to 1919. Ensign was built as a private motorboat of the same name in 1914. In 1917, the U.S. Navy acquired her under a free lease from her owner for use as a section patrol boat during World War I. She was commissioned on 17 September 1917 as USS Ensign (SP-1051) with Boatswain's Mate W. C. Mills, USNRF, in command. Assigned to the 3rd Naval District, Ensign performed submarine net patrol duties in New York Harbor until May 1918, when was transferred to the 9th Naval District for service on the Great Lakes. Arriving at Detroit, Michigan, on 14 June 1918, she patrolled until late in 1918, when the annual freezing over of the lakes brought the 1918 Great Lakes shipping season to an end. The Navy returned Ensign to her owner on 30 January 1919. References1. ^{{Cite web|url=https://www.history.navy.mil/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/NH-101000/NH-101600.html|title=NH 101600|website=www.history.navy.mil|access-date=2017-12-17}}
- {{DANFS|http://www.history.navy.mil/danfs/e4/ensign.htm}}
- SP-1051 Ensign at Department of the Navy Naval History and Heritage Command Online Library of Selected Images: U.S. Navy Ships -- Listed by Hull Number "SP" #s and "ID" #s -- World War I Era Patrol Vessels and other Acquired Ships and Craft numbered from SP-1000 through SP-1099
- NavSource Online: Section Patrol Craft Photo Archive Ensign (SP 1051)
- Naval History and Heritage Command: NH 101600 USS ENSIGN (SP-1051)[1]
{{DEFAULTSORT:Ensign (SP-1051)}} 4 : Patrol vessels of the United States Navy|World War I patrol vessels of the United States|1914 ships|Great Lakes ships |