Narvalo was one of four Squalo-class submarines built for the Regia Marina (Royal Italian Navy) during the late 1920s.

The boat served in World War II and was sunk in 1943 by British destroyers and aircraft.

[1] For surface running, the boats were powered by two 1,500-brake-horsepower (1,119 kW) diesel engines, each driving one propeller shaft.

[2] The boats were armed with eight internal 53.3 cm (21 in) torpedo tubes, four each in the bow and stern.

[1] Narvalo, named for the narwhal, was laid down on 17 October 1928 at the Cantieri Riuniti dell'Adriatico (CRDA) shipyard at Monfalcone.