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Ictíneo II was a pioneering 19th century submarine. It was launched in the Port of Barcelona on October 2, 1864 by the self-taught Spanish engineer Narcis Monturiol. It was the first air independent and combustion-powered submarine, and the first submarine to overcome the basic problems of machine powered underwater navigation.

Ictíneo II replica at the harbour of Barcelona
Class overview
General characteristics
Ictíneo II replica at the harbour of Barcelona
Class overview
| Name | Ictíneo II |
| Builder | La Navegación Submarina, |
| Operators | Narciso Monturiol |
| Preceded by | Ictíneo I |
| In service | 20 May 1865 to Dec 1867 |
General characteristics
| Class & type | Submarine |
| Displacement | 46 t (45 long tons; 51 short tons) |
| Lenght | 14 m (45 ft 11 in) (light hull) |
| Beam | 14 m (45 ft 11 in) (light hull) |
| Hight | 3 m (9 ft 10 in) (light hull) |
| Installed | Air independent steam engine |
| Power | submerged; coal powered steam engine surfaced |
| Propulsion | Screw propeller |
| Speed | 4.5 knots surfaced |
| Endurance | Tested to 7 hours submerged |
| Test depth | 30 m (98 ft) |
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