Carlo Fecia di Cossato (S 519) was aSauro-class submarine of the Italian Navy.

[1] Carlo Fecia di Cossato was laid down at Fincantieri Monfalcone Shipyard on 15 November 1975 and launched on 16 November 1977.

From 1 April 2005, she began disarmament while moored at La Spezia and she is expected to undergo restoration where she will be transferred to Trieste serve as a museum ship in their old port.

The sister submarine, Nazario Sauro was destined for a similar role and was transferred on 18 September 2009 to be exhibited at the Galata - Museum of the sea in Genoa as an integral part of the museum.

Carlo Fecia di Cossato was sold for scrap 2023.