The French submarine Narval was built in 1899 and her design was a revolution. The way she was built marked how submarines were made for the next 50 years and some of her innovations are still standard in submarine design nowadays. The French had been working hard in producing functional submarines all through the 19th Century. In 1896, the Admiralty of the @marinenationale opened a competition for a new submarine design that should solve two of the main problems this vessels had so far: a better compromise between subaquatic and surface speed, and a better range of action to allow submarines to take part in operations far from the coast. The designer Maxime Laubeuf managed to solve both with the Narval. The first problem was solved by a double hull: the inner hull was pressurized and would carry the crew and instruments while the outer hull had a hydrodynamic form that made her a better swimmer. On top of that, parts that do not need to be pressurized, like ballast or fuel tanks, could be placed between the hulls, saving space inside the pressure hull. The range problem was solved adding a surface steam engine to the electric engine for underwater drive. Another perk of this system is that the electric engine could be reloaded though dynamos when sailing with the surface engine. The Narval was on duty between 1900 and 1909. She was sold for scrapping in 1920. This model in a scale of 1:50 was built by master Maurice Verhaaren for the museum and is part of our exhibit on the history of subaquatic warfare on deck 5.