Kommoore (pronounced Kom-o-door-eh) is a German rank equivalent to Commodore. Kommodore originated as a title used by some Captains in World War I. A German Commodore could hold any naval rank between Lieutenant and Captain and the title of Commodore was held by those officers who held tactical control over more than one vessel. This was most common with U-Boat commanders in charge of several submarines that were assigned to a single task force. (In the 19th-Century, German officers of this rank were referred to as Fleet Captains.)