What rank is designated as O-7 in the Navy?

The rank designated as O-7 in the Navy is Rear Admiral (Upper Half). This rank is the Navy's equivalent of a one-star general in the Army or Marine Corps, and it signifies a senior leadership role typically involved in significant operational duties, often overseeing entire fleets or large command structures.

Brigadier General is a rank in the Army and Marine Corps that corresponds to O-7, but it does not apply to the Navy. Fleet Admiral represents the highest possible rank in the Navy but is a four-star rank, designated as O-10. Colonel is a rank used in the Army, Marine Corps, and Air Force, classified as an O-6, which is lower than that of Rear Admiral (Upper Half). Understanding these distinctions is essential for recognizing the rank structure within the U.S. military services.