Gustave Zede Class.

(Completed 1913–14.)

These two vessels are the largest submarines in the French flotillas. They have a submerged displacement of 1,000 tons, a length of 240 feet, and a beam of 20 feet. Heavy-oil engines give them a surface speed of 16 knots and electric motors a submerged speed of 10 knots. Their armament consists of two bow and two stern tubes with eight 18-inch torpedoes. They are also equipped with two 14-pdr. quick-firing guns on high-angle, disappearing mountings. The cruising range is 4,000 miles, and the complement 27 officers and men.