The Maestrale class is a class of frigates of the Italian Navy. The class is composed of eight vessels, all of which were built by Fincantieri S.p.A., Riva Trigoso, except for Grecale, which was built by Fincantieri S.p.A. – Muggiano, La Spezia.
Human torpedoes or manned torpedoes are a type of diver propulsion vehicle on which the diver rides, generally in a seated position behind a fairing. They were used as secret naval weapons in World War II. The basic concept is still in use.
The Italian Navy is one of the four branches of Italian Armed Forces and was formed in 1946 from what remained of the Regia Marina after World War II. As of August 2014, the Italian Navy had a strength of 30,923 active personnel, with approximately 184 vessels in service, including minor auxiliary vessels. It is considered a multiregional and a blue-water navy.
SMS Viribus Unitis was an Austro-Hungarian dreadnought battleship, the first of the Tegetthoff class. "Viribus Unitis", meaning "With United Forces", was the personal motto of Emperor Franz Joseph I.
COMSUBIN is the Italian Navy's special operations unit. Italy was the first nation to use frogmen and human torpedoes. The Royal Italian Navy's Naval Assault Divisions are considered to be the precursor of modern Naval Special Forces. Their record can be traced back to World War I and the operation against the Austrian-Hungarian Battleship Viribus Unitis in Pula Harbour in 1918.
The Capitani Romani class was a class of light cruisers acting as flotilla leaders for the Regia Marina. They were built to outrun and outgun the large new French destroyers of the Le Fantasque and Mogador classes. Twelve hulls were ordered in late 1939, but only four were completed, just three of these before the Italian armistice in 1943. The ships were named after prominent ancient Romans.
The Nazario Sauro class are diesel-electric submarines operated by the Italian Navy. All boats were built by Fincantieri in Monfalcone.
The Audace-class destroyers were two guided missile destroyers built for the Italian Navy during the Cold War. An improvement of the Impavido class, these ships were designed for area air defence and also had a heavy gun armament. They were fitted with contemporary American radars and sonars, but also, as the next Italian ships, all the modern weapons made by Italian industry of the time, such torpedoes, helicopters and guns. Also some indigenous radars were fitted.
The San Giorgio class are amphibious transport docks (LPD) built by Fincantieri for the Italian Navy. These ships can carry a battalion of troops, and up to 36 armored vehicles. The stern floodable dock can accommodate three landing craft. The ships are based at the Brindisi naval base on the Adriatic coast.
Caio Duilio is a destroyer of the Italian Navy. She and her sister Italian destroyer Andrea Doria form the Andrea Doria class; in turn these two ships, and the French vessels Forbin and Chevalier Paul, belong to the Horizon class. Caio Duilio is marked by hull number D 554 according to NATO classification.
The Sirio class of patrol vessels consists of two units operated by the Italian Navy named Costellazioni II series or Nuove Unità di Pattugliamento d'Altura (NUPA). These vessels were financed by the Italian Department of Transport and Navigation, under law 413/1998, for maritime economic zone surveillance, antipollution, and rescue operations.
Pietro Micca was the first torpedo cruiser built by the Italian Regia Marina, and one of the first vessels of the type to be built by any navy. She was laid down in February 1875, launched in August 1876, and completed in July 1877. Details of her armament are contradictory, with various sources reporting a range of torpedo weapons, including a single 16-inch (406 mm) torpedo tube, a pair of tubes of undetermined diameter, and as many as six tubes. She proved to be unable to reach the projected speed of 17 knots, and so she did not see much active service. She remained in the Regia Marina's inventory until 1893, but spent most of her 16-year life in the reserve.
Diana was a fast aviso or sloop of the Italian Regia Marina which served during the Second World War. Originally designed as a yacht and despatch vessel for the Italian Head of Government, she was converted for military use.
The Comandanti class of patrol vessels consists of four units operated by the Italian Navy, named as Nuove Unità Minori Combattenti (NUMC)
The Marino class of diving support vessels consists of two units operated by the Italian Marina Militare. The vessels are used by Comando Subacquei Incursori (COMSUBIN) for training and operational duties and are named MAS Motoscafo Appoggio Subacquei.
The Ponza class is a series of five Coastal transport ships of the Marina Militare, named as Moto Trasporto Fari, MTF.
The Porto class of Coastal tugboats consists of nine units operated by the Marina Militare Italiana, named as Rimorchiatore Costiero.
The following is the structure of the Italian Navy as of June 2020. It is considered a multiregional and a blue-water navy.
Primo Longobardo is a Sauro-class submarine of the Italian Navy.
Italian Navy 
