The Acciaio-class submarine (also sometimes called Platino classC Adamo at regiamarina.net) was the fifth subclass of the 600 Series of coastal submarines built by the Regia Marina. They were completed during the early 1940s and saw service in World War II.
Design and description The Acciaios were a development of the and designs, with some improvements, such as a lower conning tower to improve stability and reduce the silhouette. Of the 13 vessels in the class, six were built by CRDA at Monfalcone, four by OTO at Muggiano, and three by Cantieri Tosi in Taranto, the three main Italian shipyards for submarines. They were single-hulled with side tanks, and built to a Bernardis design, though the Tosi vessels had more powerful engines (at the expense of the two stern torpedo tubes), giving a surface speed of .
The word Acciaio means "steel", and all vessels in this class were named for metals and minerals.
Ships + List of Acciaio-class submarines Ship Builder Launched Fate OTO 20 July 1941 torpedoed 13 July 1943 by CRDA 18 December 41 bombed 14 September 1942 by Allied aircraft Tosi 22 February 1942 sunk 3 August 1943 by CRDA 25 June 1941 sunk 17 February 1943 by , , CRDA 6 September 1941 sunk 8 February 1943 by Tosi 28 September 1941 captured 12 July 1943 by British destroyers OTO 20 July 1941 rammed 12 August 1942 by CRDA 10 July 1941 surrendered at armistice September 1943 CRDA 7 August 1941 torpedoed 9 November 1942 by OTO 12 April 1942 surrendered at armistice September 1943 OTO 1 June 1941 surrendered at armistice September 1943 CRDA 23 August 1941 torpedoed 6 December 1942 by Tosi 9 November 1941 scuttled at armistice September 1943; raised by Germans, sunk in Allied air raid 1944
Service Of the 13 vessels completed, eight were lost in action. The submarines served in the Mediterranean.
See also Italian submarines of World War II
References Notes
Bibliography
External links Acciaio class at regiamarina.net Sommergibili Marina Militare website