Initially assigned on surface ships, he participated in missions during the Spanish Civil War; he then served on the submarines Narvalo and then on Atropo.

[1] On 10 June 1940, when Italy entered World War II, Visintini was serving on the submarine Torelli, and participated in its first mission in the Atlantic Ocean.

[2] Visintini and his companions had to swim to the shore, and then they returned to Italy with the help of agents from the Italian Navy intelligence service.

[5] At 23:15 on 7 December 1942, Visintini left Olterra for operation "B.G.5", and steered his manned torpedo towards the port of Gibraltar, with the aim of mining the battleship HMS Nelson.

He and his partner, Leading Seaman Giovanni Magro, managed to overcome the external obstructions and entered the harbor, but were both killed by the depth charges thrown by British surveillance to ward off Italian raiders.