Officier d'épée

In the ancien Régime French Navy, an officier d'épée (literally, sword officer) was a member of the "corps des officiers d'épée", one of the naval officer corps. This corps was divided between "officiers de vaisseau" (serving at sea) et "officiers de port" (serving in a port as pilot or in fleet maintenance). The other main corps was the administrative officier de plume.