The Squalo-class submarines were a group of four submarines built for the Royal Italian Navy (Regia Marina) during the 1930s. They were built at the Cantieri Riuniti dell'Adriatico (CRDA) shipyard at Monfalcone, and designed by Curio Bernardis.
The Squalo-class submarines were essentially repeats of the preceding . They shared that design's problems with stability and seakeeping and required the same bulging of the hull to rectify the problems. They displaced surfaced and submerged. The submarines were long, had a beam of and a draft of . They had an operational diving depth of . Their crew numbered 53 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 Squalo class had a range of at , submerged, they had a range of at .
The boats were armed with eight internal torpedo tubes, four each in the bow and stern. They carried a total of a dozen torpedoes. They were also armed with one deck gun for combat on the surface. Their anti-aircraft armament consisted of two machine guns.
Italian submarines of World War II