What is the designation for Navy E-4?

The designation for Navy E-4 is indeed Petty Officer Third Class. In the U.S. Navy enlisted rank structure, the ranks are designated in a hierarchy, and E-4 is specifically the third level of the petty officer ranks.

At E-4, personnel are expected to take on more responsibilities than at the lower ranks and are recognized for their skills and knowledge in their respective fields. The rank signifies that the individual has demonstrated competency and leadership potential, which is crucial as they may supervise junior sailors and contribute to the training and development of their peers.

In contrast, Petty Officer First Class is the E-6 designation, and Petty Officer Second Class is E-5. Chief Petty Officer, on the other hand, is the E-7 rank, representing a more senior leadership position. Hence, the correct designation for Navy E-4, Petty Officer Third Class, reflects its specific position within the enlisted ranking system.