Siméon Bourgois
French admiral

Siméon Bourgois was a 19th-century French Navy vice-admiral who was especially involved in the development of early submarines. He was born in Thionville, Lorraine, on 26 March 1815, and died in Paris on 24 December 1887.
He held the rank of captain when he presented together with Charles Brun his project for the submarine Plongeur in 1858, and when he created the plans in 1860, under the code name Q00. Plongeur was the world's first submarine to be propelled by mechanical (by opposition to human) power.
He later became a vice-admiral and was influential in the development of the French "Jeune Ecole" ("Young school") school of thought which promoted a modern Navy based on small, powerful units using new technologies. He was a pioneer in the development of the ship screw in France, and became the president of the first Commission for Submarine Defense.
From 1870 to 1872, Siméon Bourgois was Commander of the Naval Division of the Western Coasts of Africa, becoming the Colonial head of Gabon (Colony of Gorée and Dependencies), succeeding to Victor Auguste Duperré at this post. Bourgois launched in 1872 the first program to develop torpedo boats in the French Navy. He posthumously published a book in 1888, Le Torpilleur (The torpedo boat). Among other things, he also wrote in the magazine Nature an article titled De l'effet de l'huile pour calmer l'agitation de la mer (About the effect of oil to calm the agitation of the sea).
Begin with the source’s own compact description: “Siméon Bourgois” is french admiral. The dossier treats that line as a proposition to test through Siméon, Bourgois and French, not as a finished interpretation.
Why this record matters
The phrase “french admiral” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jan 18, 2026. The linked authority identifier is Q7521426. VIAF identifies the subject as 192788336. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1815, 1887, 1858 and 1860.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Siméon Bourgois”, its source revision and the description used here.
- Expand the search: follow Siméon Bourgois primary sources, Siméon Bourgois archive and Siméon research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Siméon Bourgois”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Siméon Bourgois” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.