An Officer Designate rank, it is used in the Armée de terre (Army), the Armée de l'air (Air Force), the Marine nationale (Navy) and the Gendarmerie naationale. Technically it is not a commissioned rank but it is still treated in all respects as one. Aspirants are either officers in training in military academies or voluntaries, serving as temporary officers. The aspirant must have been previously élève officier (Officer Cadet). He can afterwards be commissioned as a sous-lieutenant or enseigne de vaisseau de deuxième classe. His insignia is a single curl of gold lace, disrupted by "flashes" of wool. It was widely used during both World Wars for providing young educated people with an officer's authority.