Which of the following ranks comes directly after Lieutenant Commander?

The rank that comes directly after Lieutenant Commander is Commander. In the hierarchy of naval ranks, the progression moves up incrementally from lower to higher ranks, and the placement of these ranks is standardized across the military, including the Coast Guard.

A Lieutenant Commander is designated as an O-4 rank, while a Commander is the next rank at O-5. Understanding this ranking system is essential for effectively navigating military hierarchy and decision-making processes. As individuals progress through their careers, knowing the exact sequence of ranks can facilitate proper address, understanding of authority, and recognition of position within naval operations.

The other ranks listed, such as Captain, Rear Admiral Lower Half, and Admiral, fall beyond Commander in the chain of command. Captain is an O-6 rank, which comes after Commander. Therefore, the immediate successor rank to Lieutenant Commander is Commander, making it the correct answer.