F19 was an F-class submarine in commission in the Italian Regia Marina (Royal Navy) from 1918 to 1930. She took part in the Adriatic Campaign of

Design

Construction and commissioning In June 1915, FIAT-San Giorgio laid down an F-class submarine for the Italian Regia Marina (Royal Navy) at Italy. Originally designated F19, that submarine was sold to Portugal and entered service in the Portuguese Navy as NRP Foca.

To replace the first F19, the Regia Marina ordered a second submarine also designated F19. FIAT-San Giorgio laid down the second F19 at La Spezia on 1915. She was launched on 1918 and commissioned into service in the Regia Marina as F19 on 1918.

Service history In August 1918, the Regia Marina assigned F19 to the Ancona Submarine Flotilla for operations in the Adriatic Sea during the Adriatic Campaign of Before the war ended in November 1918, she had carried out nine war patrols along the coast of Austria-Hungary, but without significant results. In the war's immediate aftermath she operated for some time in active sectors which had not yet undergone postwar military demobilization and on 1919 participated in the occupation of Umag on the coast of Istria. Her crew was the first Italian military force to raise the Italian flag in Umag.

F19 subsequently was transferred to the Naples Maritime Command, where she conducted training activities. She participated in the naval manuevers of 1924 and 1925, and in December 1925 became the flagship of the 2nd Submarine Flotilla. She also took part in the naval maneuvers of 1926 and 1927.

F19 was placed in reserve in 1928. She was decommissioned and stricken from the navy list on . She subsequently was scrapped.

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