The Isaac Peral was the world's first all-electric, torpedo-equipped submarine. It was launched on September 8, 1888.

It weighed 77 tons, had a steel hull steel hull and was 22 meters long. It beam, width, was 2.87 meters and it depth, height, was 2.76 meters.

Its maximum immersion height was 30 meters and it could launch torpedoes and maneuver underwater, something unthinkable at the time.

In its first test firing, Peral launched a torpedo at a target 300 meters away that hit the center of the target.

In a mock battle against the battleship Cristobal Colon sailed nine kilometers at a depth of ten meters and was victorious.

The submersible had a torpedo launcher in the bow and 3 Schwarzkopf torpedoes inside. Nobody got such equipment until the 20th century.

It was powered by a 613-element accumulator battery of 220 to 8 knots on the surface (14.8 km/h) and 3.5 underwater (6.5 km/h).

The crew consisted of 12 people who were able to see what was happening on the surface by using a fixed, non-retractable periscope for the first time in history.

Peral also invented a gyroscope that enabled a revolutionary underwater navigation system for the time.

The initial budget for the project was 5,000 pesetas (32,5$), but the final cost soared to 300,000 (1,950$),