What is the rank designation for an O-4 in the USCG?

The rank designation for an O-4 in the United States Coast Guard is Lieutenant Commander. This rank is a critical leadership position within the Coast Guard, typically overseeing junior officers and ensuring the effective execution of various missions and tasks.

Lieutenant Commanders usually have substantial experience, often serving in roles such as department heads or commanding smaller units. The designation O-4 corresponds to the pay grade system used by the military, where O indicates an officer rank, and the number signifies the level of the rank.

Understanding this rank's position within the military hierarchy is important, as it indicates a significant degree of responsibility and leadership within the Coast Guard structure.