Petty officer third class (E-4)
Petty officer third class is the fourth enlisted rank in the US Navy, pay grade E-4, and the first petty officer rank. Its badge is an eagle above one chevron.
How to read it
The rating badge on the left sleeve has an eagle over one chevron pointing down, with the sailor’s specialty mark between the eagle’s talons and the chevron. On khaki shirts, E-4 to E-6 sailors wear a small metal eagle and chevrons on both collar points, and the same eagle and chevrons go on the garrison cap. The Department of Defense says petty officer third class is where the Navy’s equivalent of a noncommissioned officer begins; navy.com calls it the transition from individual contributor to leader. The rank sits above Seaman (E-3) and below Petty officer second class (E-5).
Also searched as: E-4 navy, PO3.
Ranks and insignia as the US Navy’s own uniform regulations and pages set them out. Pay grades are the Department of Defense’s.
What the symbol in the middle means
The small symbol between the eagle and the chevron is the specialty mark, which shows the sailor’s rating, the Navy’s word for a job. The uniform regulations list them: crossed anchors for a boatswain’s mate, a caduceus for a hospital corpsman, a helium atom for an electronics technician. The collar device on khakis has no specialty mark.
Rank and rate
Navy.com puts it this way: a rank identifies a sailor’s level of authority, while a rate identifies an enlisted sailor’s job specialty. Navy.com’s example is a petty officer second class (E-5) whose rate is hospital corpsman or machinist’s mate.
Chevrons pointing down
Navy petty officers have worn chevrons with the points down under a spread eagle since 1886, according to the Naval History and Heritage Command. Army and Marine Corps chevrons point up.
More navy ranks
Browse symbols drawn with lines.
Sources
- Navy Uniform Regulations, articles 4221–4227: E-1 to E-6 rate insignia, United States Navy Uniform Regulations (NAVPERS 15665J), arts. 4221–4227, Navy Personnel Command (MyNavy HR), art. 4226; art. 4226.13, .23, .24, .33; art. 4227.2b; art. 4227.2
- U.S. Military Rank Insignia, Resources: U.S. Military Rank Insignia (enlisted and officer insignia by paygrade), U.S. Department of Defense (defense.gov), Enlisted insignia, E-4; Navy notes
- U.S. Navy Ranks & Insignia, U.S. Navy Ranks & Insignia (navy.com), U.S. Navy Recruiting Command (navy.com), Petty Officers: E-4 to E-6; FAQ; FAQ
- Naval Traditions: Names of Rank, “Petty Officer”, Naval Traditions: Names of Rank, Enlisted Ranks, “Petty Officer”, Naval History and Heritage Command, paras. 5–6
- Navy Uniform Regulations, article 4331: E-1 to E-6 headgear insignia, United States Navy Uniform Regulations (NAVPERS 15665J), art. 4331, Navy Personnel Command (MyNavy HR), art. 4331.1a
- Naval Traditions: Names of Rank, “Chevrons”, Naval Traditions: Names of Rank, Enlisted Ranks, “Chevrons”, Naval History and Heritage Command, paras. 3–4
Last reviewed September 29, 2026 by Rory Hansen. How we research