United States L-class submarine
Class of ship
The United States L-class submarines were a class of 11 coastal defense submarines built 1914–1917, and were the most modern and capable submarines available to United States Navy when the country entered World War I. Wikipedia
Built: 1914–1917
Length: EB design: 168 ft 5 in (51.33 m); Lake design: 165 ft (50 m)