Commodore (United States)

Commodore was an early title and later a rank in the United States Navy, United States Coast Guard and also has been a rank in the United States Public Health Service Commissioned Corps and the National Oceanic and Atmospheric Administration Commissioned Officer Corps (NOAA Corps) and its ancestor organizations. For over two centuries, the designation has been given varying levels of authority and formality.

Source: Wikipedia — Commodore (United States) (CC BY-SA 4.0)