The sixth USS Congress (ID-3698) was a motor launch in commission in the United States Navy as a patrol vessel from 1918 to 1919. Congress was built as the private fishing vessel Congress in 1914 at Gwynn, Virginia. The U.S. Navy's 5th Naval District inspected her on 17 May 1918 for possible World War I service. The Navy purchased her from A. Foster of Grimstead, Virginia, in October 1918, having already commissioned her as USS Congress on 25 September 1918. The Navy assigned her Identification Number (Id. No.) 3698 and placed her in service on 18 October 1918.