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Section patrol craft

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Civilian vessel registered by the U.S. Navy during World War I

USS *Kanawha II*, later renamed USSPiqua, was a privateyacht prior to her World War I Navy service. She received the section patrol number SP-130.

Thetroopship *America* was the former Germanocean linerAmerika. She was assigned theU.S. Navy ID number 3006.

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v t e

ASection Patrol Craft was a civilian vessel registered by theUnited States Navy for potential wartime service before, during, and shortly afterWorld War I.

Historical overview

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The SP/ID registration system

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In 1916, with World War I raging abroad, the U.S. Navy began a registry of privately ownedpleasure craft andyachts that were available forpatrol service in the event the United States was drawn into the conflict, which it eventually entered on 6 April 1917.Naval Registry Identification Numbers were assigned in a "Section Patrol" series beginning with SP-1 and ultimately extending to well over 4000.

As the registration process continued, other types of ships and craft (such ascargo ships,tankers, andpassenger ships) were included which were not suited or intended for patrol duty and for which the "Section Patrol" designation was clearly inappropriate, and these were generally given "Identification" ("ID") numbers in the same series as the "SP" numbers. In addition, some vessels that were numbered with an "SP" prefix before 1918 later had that prefix changed to "ID". Many of the ships and craft assigned SP or ID numbers had no Navy service, while others that were acquired and employed by the Navy received no numbers.

The registry, and the SP/ID number series, was continued at least into the early 1920s, with new numbers being assigned to ships completed or examined after World War I ended on 11 November 1918. The latter category included some ships that served in the Navy without SP or ID numbers between 1917 and 1919.

SP/ID numbers and U.S. Navy hull numbers

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The SP and ID registry numbers were not U.S. Navy "hull numbers," which would not be formally adopted until 17 July 1920. However, like hull numbers, the SP and ID numbers were used for record-keeping purposes and were often painted on the exterior of vessels (especially patrol types) to facilitate identification. They can therefore be considered precursors of the U.S. Navyhull number system instituted in July 1920 and still in use today. At least 67 vessels with ID / SP numbers were later given modern hull symbols, with a few (at least 7) retaining their ID or SP numbers under the new system.

World War I section patrol (SP) and identification number (ID) series

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Incomplete listing of civilian boats and ships commissioned duringWorld War I for use assection patrol (SP) craft and civilian cargo ships, tankers, transports, etc., commissioned for U.S. Navy use during World War and given non-"SP" identification numbers (ID) in the "SP" numbering series.

Identification numbers (ID)

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Many of these ships would be later sunk duringWorld War II while in commercial service. Two would be deliberately sunk asMulberry harbor breakwaters during theinvasion of Normandy. Only sinkings while in US Navy service with an ID number are listed.

Section patrol (SP)

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References

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^AlthoughtheDictionary of American Naval Fighting Ships (DANFS) entry forWestover gives her identification number as 2687, bothOnline Library of Selected Images:Westover (American Freighter, 1918). Served as USSWestover (ID # 2867) in 1918 andNavSource Online: Section Patrol Craft Photo Archive Westover (ID 2867) give it as 2867, apparently updating and correcting the number in theDANFS entry.
^Department of the Navy Naval History and Heritage Command Online Library of Selected Images: Civilian Ships:Politesse (American Motor Boat, 1911). Served as USSPolitesse (SP-662) in 1917-1919

This article incorporatespublic domain material from websites or documents of theNaval History and Heritage Command.[1]

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