Which rank is indicated by O9?

The rank indicated by O-9 is Vice Admiral. In the U.S. Navy and other uniformed services, officer ranks are classified using the pay grade system known as the "O" scale. Each rank is represented with a number, where O-1 represents an Ensign, O-2 represents a Lieutenant Junior Grade, and it continues to O-10, which is Fleet Admiral.

When looking specifically at O-9, this classification corresponds to the rank of Vice Admiral, who typically commands a naval fleet or serves in high-level administrative positions. Vice Admirals hold significant responsibilities within the naval structure, including strategy development and operational command at high levels.

Understanding the hierarchy of naval ranks is essential, as each rank carries specific duties and responsibilities that contribute to the overall effectiveness of military operations.