What is the collar device for an E-4 in the Navy?

The collar device for an E-4 in the Navy is represented by an eagle perched above one chevron. This insignia signifies the rank of a Petty Officer Third Class, which is the E-4 pay grade in the Navy. The design emphasizes the leadership role that comes with this rank, indicating a transition from junior enlisted ranks to a more advanced position with increased responsibilities.

The eagle symbolizes strength and authority, while the chevron denotes a specific level of rank within the enlisted hierarchy. This distinction is important in recognizing the progress and achievements of sailors as they advance in their careers.