// Workers AI · dad joke modeWhat did the Italian submarine F9 say? "I'm having a whale of a time underwater.

History
Italy
Name	F9
Builder	FIAT-San Giorgio, La Spezia, Italy
Laid down	3 June 1915
Launched	24 September 1916
Commissioned	29 December 1916
Decommissioned	1 August 1928
Identification	Pennant number F9
Motto	Ubi Mars atrocissimus adsum (Where Mars is most ferocious, I am there)
Fate	Scrapped
General characteristics
Class & type	F-class submarine
Displacement	262 long tons (266 t) (surfaced) 319 long tons (324 t) (submerged)
Length	45.6 m (149 ft 7 in) (overall) 45.1 m (148 ft 0 in) (between perpendiculars)
Beam	4.2 m (13 ft 9 in)
Draught	3.1 m (10 ft 2 in)
Propulsion	2 × 670 bhp (500 kW) Fiat diesel engines 2 × 500 hp (373 kW) Savigliano electric motors 2 x shafts 15 tons diesel fuel
Speed	12.5 knots (23.2 km/h; 14.4 mph) (surfaced) 8.2 knots (15.2 km/h; 9.4 mph) (submerged)
Range	1,600 nmi (3,000 km; 1,800 mi) at 8.5 knots (15.7 km/h; 9.8 mph) (surfaced) 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) (submerged)
Test depth	45 metres (148 feet)
Complement	26 (2 officers, 24 men)
Armament	2 × 450 mm (17.7 in) torpedo tubes (2 bow) 4 x torpedoes 1 × 76 mm (3 in) deck gun
Notes	SOURCE:

F9 was an F-class submarine in commission in the Italian Regia Marina (Royal Navy) from 1916 to 1928. She took part in World War I, conducting antisubmarine patrols in the Mediterranean Sea during the Mediterranean U-boat campaign and seeing service in the Adriatic Campaign.

Design

Main article: Italian F-class submarine

Construction and commissioning

F9 is launched at Muggiano, La Spezia, Italy, on 24 September 1916.

F9 was laid down by FIAT-San Giorgio at Muggiano, La Spezia, Italy, on 3 June 1915. She was launched on 24 September 1916 and commissioned on 29 December 1916.

Service history

After F9 completed workups, the Italian Regia Marina (Royal Navy) assigned her to duty with the La Spezia Maritime Command on 10 January 1917 during the Mediterranean U-boat campaign of World War I. She conducted several antisubmarine patrols in the northern Tyrrhenian Sea.

In March 1917, F9 was transferred to the 1st Submarine Squadron at Venice and her sister ship F10 was reassigned to the Brindisi Submarine Squadron, and the two submarines set out on their transfer voyage in company. During their voyage, they were involved in a friendly fire incident on 11 March when the Italian destroyer Euro and torpedo boat Airone mistook them for Central Powers submarines and opened fire on them off Messina, Sicily. The two submarines quickly submerged and avoided damage.

The 1st Submarine Squadron assigned F9 to a base at Porto Corsini, from which she operated in the Adriatic Sea during the Adriatic Campaign. She conducted patrols along the coast of Dalmatia through the end of World War I in November 1918, but without noteworthy results.

After World War I, F9 continued to operate in the Adriatic Sea, participating in maneuvers and conducting training cruises. She was decommissioned and stricken from the navy list on 1 August 1928. She subsequently was scrapped.

References

Bibliography

• Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN 0-85177-146-7.
• Favre, Franco (2008). La Marina nella Grande Guerra. Le operazioni aeree, navali, subacquee e terrestri in Adriatico [The Navy in the Great War: Aerial, Naval, Underwater, and Land Operations in the Adriatic] (in Italian). Udine: Gaspari Editore.
• Gardiner, Robert; Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. London, UK: Conway Maritime Press. ISBN 978-0851772455.
• Giorgerini, Giorgio (2002). Uomini sul fondo. Storia del sommergibilismo italiano dalle origini a oggi [Men at the Bottom: History of Italian Submarining from its Origins to Today] (in Italian). Milano: Arnoldo Mondadori Editore. ISBN 978-8-80450-537-2.
• Maffi, Mario (1919). La Vittoria in Adriatico [The Victory in the Adriatic] (in Italian). Milano: Alfieri e Lacroix.