|Name||No||Yard No||Builder||Laid down||Launched||Comp||Fate|
|Foca||FIAT-San Giorgio, La Spezia||4/1907||8.9.1908||2/1909||discarded 9.1918|
|Displacement standard, t|
|Displacement normal, t||
185 / 280
|No of shafts||
3 FIAT petrol engines / 2 electric motors
|Power, h. p.||
800 / 160
|Max speed, kts||
16 / 6
|Endurance, nm(kts)||350(10) / 45(4)|
2 - 450 TT (bow, 4)
|Diving depth operational, m||35|
Designed by Fiat-San Giorgio Yards, the Foca was a development of the Glauco class and was the only Italian submarine provided with 3 shafts and 3 propellers, operated by three sets of Fiat petrol motors for a total of 800bhp. On 26 April 1909 an internal petrol explosion set fire to her fuel, in Naples harbour so it was necessary to sink the boat. Refloated and towed to La Spezia, she was repaired, and the central motor with its shaft and propeller were removed. After this accident, the Italian Navy gave up building petrol-powered submarines.
(1909-1910): central shaft was removed; 600 / 160hp, 12 / 6kts.
No significant events.