U.S. Naval History and Heritage Command photograph; collection is in the public domain
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
(Original text) : {{Information |Description = The United States Navypatrol vessel {{USS|Sylvia|SP-471}} During World War I. |Source = http://www.history.navy.mil/photos/sh-usn/usnsh-s/sp471.htm |Date = Sometime in 191