USS L-11

[1] For surface running, the Electric Boat submarines were powered by two 450-brake-horsepower (336 kW) diesel engines, each driving one propeller shaft.

[2] Assigned to the Atlantic Submarine Flotilla, L-11 operated along the East Coast developing new techniques of undersea warfare until April 1917.

After the United States's entry into World War I, submarines were needed to protect Allied shipping lanes to Europe, and L-11 departed Boston, Massachusetts, on 4 December to undertake the task.

After the Armistice with Germany, L-11 operated out of the Isle of Portland, England, until 3 January 1919 when she sailed for the United States.

Arriving Philadelphia, Pennsylvania, on 1 February, she operated off the East Coast for the next four years developing submarine warfare tactics.

L-class submarines USS L-3 , USS L-11 , USS L-10 , USS L-4 , and USS L-9 alongside their submarine tender in British waters in 1918. The "A" (for "American") was added to avoid confusion with British L-class submarines .