What is an E-3 in the Navy called?

An E-3 in the Navy is called a Seaman. This rank is part of the enlisted sailor classification and signifies a level of advancement beyond the initial training of the Seaman Apprentice (E-2) rank. The progression from E-2 to E-3 typically involves meeting certain time-in-service requirements and completing basic training phases. A Seaman has demonstrated a foundational understanding of naval operations, is expected to take on more responsibilities, and is advancing in skills and knowledge relevant to their duties.

The other ranks mentioned are higher or different classifications; for instance, Petty Officer Third Class is an E-4 rank and denotes a more advanced level of responsibility and leadership within the Navy structure.