What rank corresponds to O-1 in the Navy?

The rank that corresponds to O-1 in the U.S. Navy is Ensign. This is the entry-level officer rank in the Navy and serves as the starting point for officers who have completed their training and commissioning process. As an O-1, an Ensign is typically responsible for leading small operations or teams and may hold various positions aboard ships or in shore commands.

The other ranks listed, such as Lieutenant Junior Grade, Lieutenant, and Commander, correspond to higher pay grades (O-2, O-3, and O-5 respectively) and carry more responsibilities and experience. Understanding these distinctions is vital for recognizing the officer structure within the Navy and how ranks progress from Ensign to higher positions.