Italian submarine Attinio cancelled in 1943

Of the Tritone-class or Flutto-class type III copy of the Type II. Dimensions 64.19 x 6.98 x 4.93 metres a displacement of 928 (surfaced)-1.131 (submerged) tons. Crew numbered 49 men including 5 officers. Speed 16 (surfaced)-8 (submerged) knots. Range surfaced 5.400 nautical miles/8 knots respectively 2.000/16 and submerged 80 nautical miles/4 knots respectively 7/8. Armament 7-53,3cm/21” torpedo tubes (4 for, 2 aft), 1-10cm/4” cal 47 gun on the fore deck before the tower and 2x1-2cm anti aircraft guns. Diving depth 130 metres.

Never laid down but building cancelled after the armistice between Italy and the Allies dated 3 September 1943.

Sources

Erminio Bagnasco, Submarines of World War Two, Cassell & Co, London. 1977

Paolo M. Pollina. I Sommergibili Italiani. Ufficio Storico della Marina Militare. Rome, 1963

Several editions of Jane’s Fighting Ships

https://www.marina.difesa.it/

http://www.regiamarina.net/

http://warshipsresearch.blogspot.com/