Bragadin-class submarine

The "Bragadin"-class submarines were built for the (Royal Italian Navy) during the late 1920s. Both boats participated in the Second World War and were discarded in 1948.
Design and description.
The "Bragadin"-class submarines were essentially minelaying versions of the earlier . They shared that class's problems with stability and had to be modified to correct those problems after completion. They displaced surfaced and submerged. As built the submarines were long, had a beam of and a draft of . In 1935 the stern was shortened and the boats were bulged to improve their stability. They now measured in length and had a beam of and draft of . They had an operational diving depth of . Their crew numbered 56 officers and enlisted men.
For surface running, the boats were powered by two diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a electric motor. They could reach on the surface and underwater. On the surface, the "Bragadin" class had a range of at , submerged, they had a range of at .
The boats were armed with four internal torpedo tubes in the bow for which they carried six torpedoes. In the stern were two tubes which could accommodate a total of 16 or 24 naval mines, depending on the type. They were also armed with one deck gun for combat on the surface. Their anti-aircraft armament consisted of two machine guns.