What is the rank assigned to O-3 in the operational structure?

In military rank structures, O-3 is assigned to the rank of Lieutenant. This rank is typically situated above O-2, which is the rank of Lieutenant Junior Grade, and below O-4, which is the rank of Commander. A Lieutenant often serves in leadership roles, responsible for overseeing the activities of junior officers and leading various operations or missions.

This rank is part of the officer category in the operational structure, where officers are promoted based on time in service and completed qualifications. Being at O-3 signifies that the individual has gained experience and has proven their abilities to take on increased responsibilities, which is essential in military operations.

The other ranks mentioned do not align with the O-3 designation; Lieutenant Junior Grade is O-2, Commander is O-5, and Captain is O-6, showcasing the hierarchical organization of military ranks.