USS L-10

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

Assigned to the Atlantic Submarine Flotilla, L-10 operated along the United States East Coast until April 1917 developing new techniques or undersea warfare.

Following the United States's entry into World War I, submarines were needed to protect Allied shipping lanes to Europe.

She patrolled waters off the Azores for the next month before joining Submarine Division 5 in the British Isles in January 1918.

He thereupon proceeded to destination successfully, assuming the great responsibility of starting a 1,700-mile Atlantic Ocean run in winter weather and in a submarine of a class that had never been considered reliable under such conditions.

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 .