Camille Tissot

Lore & Background

Camille Tissot was born on 15 October 1868, the second child of Pierre Tissot and Adeline Alexandrine Gérardin. His father was often at sea, so he and his sister Esther were primarily raised by their mother. Recommended by his father, Tissot entered the naval college at Brest in 1884 at age 16, studying navigation on the school ship Le Borda until 1886. After postings to various school ships and warships, he turned to shore duty on 23 January 1891 and accepted a temporary teaching position in physics and chemistry at the naval school, remaining as a professor for 21 years. He obtained a Bachelor of Physical Sciences and began studying electric oscillations and their maritime applications.

In 1894, Tissot married Jeanne Emma Stapfer, a 20-year-old woman from an Alsacienne family. He nominally converted to Catholicism at his father-in-law's request, though his own beliefs were socialist and atheist. The couple had one daughter, Camille. Tissot's career progressed through ranks: Aspirant of second class (1 August 1886), Aspirant of first class (5 October 1887), Enseigne de vaisseau (5 October 1889), Lieutenant de vaisseau (22 August 1896), and Capitaine de frégate (19 April 1912). The final promotion was exceptional for a sailor who practically never sailed, granted due to the importance of his work for the Navy.

In 1896, while the work of Lodge and Marconi was still little known, Tissot undertook independent research on wireless telegraphy. He built apparatus with assistance from Édouard Branly and manufacturer Eugene Ducretet. On 3 August 1898, he demonstrated the first French operational radio connection at sea, covering 800 meters between a ship and an on-shore semaphore station. The Minister of Marine agreed to finance further tests. In 1899, Tissot organized a large trial run demonstrating communications between points in the roads of Brest and the Saint Martin church, then to islands Vierge and Stiff. That year he also established radio contact to the island of Ouessant, which became Ushant radio station with call sign FFU, active until 1943.

Reader's Guide

Tissot's significance lies in his foundational role in French maritime wireless telegraphy. In 1900, he equipped the French Navy with its first radio apparatus. By 1902, the Ushant TSF station had a radiotelegraphy range of 80 kilometers with a fleet of 14 ships and with Brest. In 1904, the Ouessant station (FFU) carried out connections on 600 meters with passenger ships. From 1905, Tissot studied radio signal detection and demonstrated the possibility of using radio to transmit time signals for regulating ships' chronometers, leading the Bureau des Longitudes to start daily time signal service in May 1910. In 1907, he conceived a crystal radio without tiresome adjustment for shipboard use. During World War I, he made several stays at Bizerte to equip ships with radio and work on underwater sound detection. Tissot died in October 1917 of pulmonary tuberculosis and influenza, buried in the military square of the cemetery of Arcachon. He was an Officer of the Legion of Honor and Officer of State Education. His legacy includes three detailed works: a doctoral thesis on antenna resonance (1905), a treatise on electric oscillations (1906), and a handbook of theoretical and practical TSF (1912, republished through 1932). He also wrote many popularizing articles and gave conferences, and received several prizes from the Académie des Sciences.

Did You Know?

• Tissot established the first French operational radio connection at sea on 3 August 1898, covering 800 meters.
• He served as a professor at the École Navale for 21 years, despite being a naval officer who practically never sailed.
• The Ushant radio station (call sign FFU), established by Tissot in 1899, remained active until 1943.