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fighting ships of the world

REGIA MARINA / ITALIAN NAVY (ITALY)

SUBMARINES

ACCIAIO medium submarines (1941-1942)

Acciaio 1942

Giada 1954

Giada 1963

Name No Yard No Builder Laid down Launched Comp Fate
Acciaio     OTO, Muggiano 11/1940 20/7/1941 1/1942 sunk 13/7/1943
Alabastro     CRDA, Monfalcone 3/1941 18/12/1941 5/1942 sunk 14/9/1942
Argento     Tosi, Taranto 4/1941 22/2/1942 5/1942 sunk 3/8/1943
Asteria     CRDA, Monfalcone 10/1940 25/6/1941 11/1941 sunk 17/2/1943
Avorio     CRDA, Monfalcone 11/1940 6/9/1941 3/1942 sunk 9/2/1943
Bronzo     Tosi, Taranto 12/1940 28/9/1941 1/1942 captured by UK 12/7/1943 (P714)
Cobalto     OTO, Muggiano 11/1940 20/7/1941 1/1942 sunk 12/8/1942
Giada, 2/1948- PV2, 3/1951- Giada 1953- S501   CRDA, Monfalcone 10/1940 10/7/1941 12/1941 discarded 1/1966
Granito     CRDA, Monfalcone 11/1940 7/8/1941 1/1942 sunk 9/11/1942
Nichelio     OTO, Muggiano 7/1941 12/4/1942 7/1942 to Soviet Union 2/1949 (-42 <I-42>)
Platino     OTO, Muggiano 11/1940 1/6/1941 10/1941 discarded 2/1948
Porfido     CRDA, Monfalcone 11/1940 23/8/1941 1/1942 sunk 6/12/1942
Volframio (ex-Stronzio)     Tosi, Taranto 12/1940 9/11/1941 2/1942 scuttled 8/9/1943
  

Displacement standard, t

629 - 643

Displacement normal, t

697 / 850

Length, m

60.2

Breadth, m

6.44

Draught, m

4.78

No of shafts

2

Machinery

2 Fiat diesels / 2 CRDA electric motors

Argento, Bronzo, Volframio: 2 Tosi diesels / 2 Ansaldo or Marelli electric motors

Power, h. p.

1400 / 800

Argento, Bronzo, Volframio: 1500 / 800

Max speed, kts

14 / 7.7

Argento, Bronzo, Volframio: 14.7 / 7.7

Fuel, t

diesel oil 78

Endurance, nm(kts) 2300(14) / 80(4)

Armament

1 x 1 - 100/47 OTO 1938, 2 x 1 - 13.2/76 or 2 x 2 - 13.2/76 or 1 x 1 - 20/70 Scotti-Isotta Fraschini 1939 or 2 x 1 - 20/70 Scotti-Isotta Fraschini 1939, 6 - 533 TT (4 bow, 2 stern, 10)

Argento, Bronzo, Volframio: 1 x 1 - 100/47 OTO 1938, 2 x 1 - 13.2/76 or 2 x 2 - 13.2/76 or 1 x 1 - 20/70 Scotti-Isotta Fraschini 1939 or 2 x 1 - 20/70 Scotti-Isotta Fraschini 1939, 4 - 533 TT (bow, 8)

Sensors hydrophone

Complement

45

Diving depth operational, m 80

Ship project history: Last, 5th series of 600t submarines. Repetition of Adua class with CT of moderated size for stability improvement and perceptibility decrease. Also power of diesels was raised. Three ships at the expense of application of even more powerful, than on remaining ships of series, had no stern TTs.

Modernizations: 1953, Giada: - 1 x 1 - 100/47; fin was streamlined, artillery consisted from 2 x 2 - 13.2/76, 701/865t, 1350/800hp, 14.7/7.9kts, complement 54, endurance surfaced 3500(8) nm, 40t of diesel oil, + radar, sonar

1950s, Giada: - 2 x 2 - 13.2/76

Naval service: Cobalto was sunk 12/8/1942 N of Bizerte by ramming of British destroyer Ithuriel. Alabastro was sunk 14/9/1942 on approaches to Philippeville (Algeria) by British aircraft. Granito was sunk 9/11/1942 near Cape St. Vito (Sicily) by British submarine Saracen. Porfido was sunk 6/12/1942 near cape Bon by British submarine Tigris. Avorio was sunk 9/2/1943 off Bougie by Canadian corvette Regina. Asteria was scuttled by crew 17/2/1943 NW of Bougie after attack of British escort destroyers Easton and Wheatland. Bronzo surrendered 12/7/1943 near Syracuse after battle against British minesweepers Boston, Cromarty and Poole, renamed P714, later transferred to France and named Narval. Acciaio was sunk 13/7/1943 N of Strait of Messina by British submarine Unruly. Argento was sunk 3/8/1943 S of Pantelleria by American escort destroyer Buck. Volframio was scuttled by crew 8/9/1943 in La Spezia harbour, raised by Germans but never commissioned by them and in 1944 sunk by Allied bombers.

    Giada was remained in the navy list after war being officially classified as battery recharging station till March, 1951, when she was reclassified as submarine, modernized in 1951 - 1953 and commissioned again by Italian Navy.

Alabastro 1942

Giada 1959

 

Ivan Gogin, 2009-15