Which rank is indicated by the designation O-6?

The designation O-6 corresponds to the rank of Captain in the United States Navy and Coast Guard. This is an officer rank that is typically held by individuals who have demonstrated significant leadership and operational experience.

In the context of military ranking, the "O" stands for "officer," and the number denotes the rank within the officer hierarchy, with O-1 being the lowest officer rank and O-10 representing the highest. As an O-6, a Captain would be responsible for commanding larger units or installations, often overseeing significant operations or functions within the service.

Understanding the ranking structure is crucial for navigation in professional military contexts and plays a vital role in command and hierarchy within the Navy and Coast Guard. This knowledge aids in recognizing the level of authority and responsibility associated with each rank.