Commodore is a naval rank used in many navies that is superior to a navy captain, but below a rear admiral.It is either considered the lowest of the flag officers rank or may not hold the jurisdiction of a flag officer at all depending on the officers appointment.Non-English-speaking nations often use the rank of flotilla admiral, counter admiral, or senior captain as an equivalent, although counter admiral may also correspond to rear admiral.
Traditionally, "commodore" is the title for any officer assigned to command more than one ship at a time, even temporarily, much as "captain" is the traditional title for the commanding officer of a single ship even if the officer's official title in the service is a lower rank. As an official rank, a commodore typically commands a flotilla or squadron of ships as part of a larger task force or naval fleet commanded by an admiral. A commodore's ship is typically designated by the flying of a broad pennant, as opposed to an admiral's flag.
It is sometimes abbreviated: as "Cdre" in British Royal Navy, "CDRE" in the US Navy, "Cmdre" in the Royal Canadian Navy, "COMO" in the Spanish Navy and in some navies speaking the Spanish language, or "CMDE" as used in some other Navies of several countries.
The rank of commodore derives from the Frenchcommandeur, which was one of the highest ranks in the orders of knighthood, and in military orders the title of the knight in charge of a commande (a local part of the order's territorial possessions).