Which rank corresponds to the O-6 pay grade?

The rank that corresponds to the O-6 pay grade is Captain. In the Navy, the Officer ranks are designated by a letter and a number, where "O" stands for officer ranks and the number indicates the pay grade. Specifically, O-6 refers to the sixth level of commissioned officers.

In the Navy, a Captain is a senior rank and typically commands large vessels or significant shore installations. This rank is equivalent to the rank of Colonel in the Army, Air Force, and Marine Corps. Understanding the classification of ranks is important for recognizing the structure within the military and how various ranks correlate with responsibilities and command levels.

The other ranks listed, such as Crew Chief, Commander, and Major, belong to different pay grades or branches. A Crew Chief is not a recognized rank in the commissioned officer structure, Commander is actually O-5, and Major is an O-4 rank in the Army/Air Force/Marine Corps, distinguishing them from the O-6 Captain rank in the Navy.