Rosily, hydrography, and active sea service

François Étienne de Rosily-Mesros was an eminent hydrographer and an experienced officer, but Napoleon resisted his request for further honour. The emperor placed officers who had exposed themselves to danger at sea ahead of a man whose recent career had kept him in Paris. Napoleon still called Rosily a good officer and had earlier listed him among the few candidates capable of taking over the Toulon squadron. The tension separates specialist competence from the sustained operational experience needed for fleet command. Rosily's profile shows how the French Navy could elevate a technically accomplished officer without giving him enough recent sea service to inspire confidence as a vice admiral.