Louis-Émile Bertin

Louis-Émile Bertin
Louis-Émile Bertin in Institut de France uniform, post 1903
Born	(1840-03-23)March 23, 1840 Nancy, France
Died	October 22, 1924(1924-10-22) (aged 84) La Glacerie, Manche France
Nationality	French
Occupation	naval engineer

Louis-Émile Bertin (23 March 1840 – October 22, 1924) was a French naval engineer, one of the foremost of his time, and a proponent of the "Jeune École" philosophy of using light, but powerfully armed warships instead of large battleships.

Bertin was born in Nancy, France on 23 March 1840. He entered the Paris École polytechnique in 1858. At exiting the school, he chose the field of Naval Engineering (Corps du génie maritime). His role model was Henri Dupuy de Lôme, who had designed the first ironclad warship in France. Bertin came to be known for his innovative designs, often at odds with conventional wisdom, and won international recognition as a leading naval architect. In 1871, he also became a doctor of laws, showing great versatility of talents.

In 1885, the Japanese government persuaded the French Génie Maritime to send Bertin as a special foreign advisor to the Imperial Japanese Navy for a period of four years from 1886 to 1890. Bertin was tasked with training Japanese engineers and naval architects, designing and constructing modern warships, and naval facilities. For Bertin, then aged 45, it was an extraordinary opportunity to design an entire navy. For the French government, it represented a major coup in their fight against Great Britain and Germany for influence over the newly-industrializing Empire of Japan.

While in Japan, Bertin designed and constructed seven major warships and 22 torpedo boats, which formed the nucleus of the budding Imperial Japanese Navy. These included the three Matsushima class protected cruisers, which featured a single but immensely powerful 12.6 inch Canet main gun, which formed the core of the Japanese fleet during the First Sino-Japanese War of 1894–1895.