What additional element does the Chief Petty Officer insignia include compared to a Petty Officer First Class?

The Chief Petty Officer insignia includes a rocker, which is a distinguishing feature that sets it apart from the insignia of a Petty Officer First Class. In the Navy's rank insignia system, the addition of the rocker symbolizes the higher rank and increased responsibilities associated with being a Chief Petty Officer. This insignia not only signifies the rank but also represents leadership and experience within the Navy.

Petty Officer First Class insignia does not include a rocker; it features chevrons without any additional elements that denote a higher rank. The rocker signifies the advancement to a Chief Petty Officer, highlighting the transition from a technical role to one that encompasses greater leadership and mentorship responsibilities over junior personnel. Thus, the presence of the rocker in the Chief Petty Officer rank is a key distinction reflecting this elevated status.