Which rank corresponds to the O-2 designation?

The rank that corresponds to the O-2 designation in the U.S. Navy and Coast Guard is Lieutenant Junior Grade. This is a foundational rank for officers that follows the O-1 rank of Ensign. At the Lieutenant Junior Grade level, officers typically begin to take on more responsibilities and leadership roles within their units, often serving as department heads and gaining valuable experience in command positions.

Understanding this designation is important for distinguishing between various officer ranks and their corresponding responsibilities. The ranks in the military each build on one another as officers progress through their careers, and knowing the specifics of each rank helps in understanding the overall structure and hierarchy of the service.