What rank is represented by O4 in the Navy?

In the Navy, the rank of O-4 is classified as Lieutenant Commander. This rank is a senior officer rank, positioned above Lieutenant (O-3) and below Commander (O-5). Lieutenant Commanders often have significant responsibilities, which may include leadership roles in various divisions or departments and typically command smaller vessels or units.

Understanding the ranks and their corresponding pay grades is crucial in the Navy, as it reflects the hierarchy and the structure of command. This knowledge not only helps in recognizing the roles and responsibilities associated with each rank but also aids in proper communication and respect within the naval framework.