What is the immediate rank progression after an O-3?

The immediate rank progression after an O-3, which is the rank of Lieutenant in the Navy, is Lieutenant Commander. The ranks in the Navy follow a specific structure where the rank of O-3 is directly followed by O-4, which is the rank of Lieutenant Commander.

This progression reflects the typical advancement in responsibility and leadership within the Navy's officer ranks. Understanding these rank structures is vital for navigating career pathways and understanding the hierarchy of the Navy. As officers gain experience and time in service, they typically advance through these ranks. In this context, it's essential to be aware that each rank comes with distinct responsibilities and expectations that are critical for effective leadership and mission execution.