What term is used for a Naval Academy graduate serving in the Navy?

The term used for a Naval Academy graduate serving in the Navy is "Ensign." Upon graduation from the United States Naval Academy, newly commissioned officers are given the rank of Ensign, which is the lowest officer rank in the Navy. This rank signifies that the individual has completed the rigorous training and education provided by the Academy, preparing them to serve in various capacities within the naval service.

The other ranks listed, such as Lieutenant and Captain, are higher ranks that officers achieve after gaining experience and fulfilling specific requirements within their careers. Similarly, "Midshipman" refers to a student at the Naval Academy who has not yet graduated and received a commission as an officer. Thus, "Ensign" accurately represents the immediate designation for graduates entering service as commissioned officers.