What is the title for O-4 in the Navy?

The title for O-4 in the Navy is "Major." In the Navy officer ranks, O-4 is designated as Lieutenant Commander. This rank is an essential position, often responsible for leading divisions, managing personnel, and overseeing operations. A Lieutenant Commander typically serves in various roles where they can further develop their leadership skills and experience within the naval hierarchy.

While Commander is a valid title, it is associated with O-5, and the ranks below O-4, such as Lieutenant and Captain, relate to lower and higher ranks respectively, which do not apply to O-4. Thus, recognizing the correct ranking and titles is crucial for understanding the organizational structure and command in the Navy.