An item referred to the magazine Le Yacht reporting that the new planned French submarines were to have a displacement of 398 ton and as dimensions 51 x 5 x 3,13 metres. Maximum horsepower supplied by the steam drive machinery was 700 hp allowing via 2 screws a maximum speed of 12 miles. The crews numbered 24 men (included 2 officers). The armament consisted of 7 torpedo tubes. As a result of the increased displacement was the crew accommodation improved and the range increased. For the moment being were 18 of this submarines planned.
