Bellone Class.

(Completed 1914.)

Fast sea-going submarines with a submerged displacement of 610 tons. They have heavy-oil engines of about 2,000 H.-P., which give them a surface speed of 17 ½ knots. Electric motors of 950 H.-P. drive them at 12 knots when submerged. Their surface cruising range is 4,000 miles. Their armament consists of eight 18-inch torpedoes and two 14-pdr. quick-firing, high-angle guns. The complement is 30 officers and men.