In Navy rank structure, which rank comes before Rear Admiral (lower half)?

The rank that comes before Rear Admiral (lower half) in the Navy rank structure is O-5, which corresponds to the rank of Captain. In the Navy, the rank structure ascending order starts from Ensign at O-1, progressing through Lieutenant Junior Grade (O-2), Lieutenant (O-3), Lieutenant Commander (O-4) and reaching Captain at O-5, just before the flag officer ranks of Rear Admiral (lower half) at O-7 and Rear Admiral (upper half) at O-8.

Understanding this hierarchy is crucial for naval personnel to recognize the progression through ranks and the associated responsibilities. O-5 (Captain) is not only a significant leadership role but also often involves command of larger units or activities, such as ships or operational commands. This context helps highlight the importance of each rank within the Navy’s structure and operational effectiveness.