United States Navy Petty Officer 1st Class Rank Insignia Patch E6, Aviation antisubmarine warfare

A Petty Officer First Class is the third of the Navy's Petty Officer grades, and serves as a non-commissioned officer. A Petty Officer First Class serves both as a leader and as a technical expert, and all Petty Officers have a specified rating, or job. The exact title with which a petty officer is addressed depends on their specialty; a Petty Officer First Class serving as an Electronics Technician, for example, would have the full title of Electronics Technician First Class.
Petty Officer First Class is the 6th rank in the United States Navy with a grade of O-6, ranking above Petty Officer Second Class and directly below Chief Petty Officer.

Aviation electronics technician (AT) is a US Navy enlisted rating or job specialty. The rating now known as AT can trace its origin to World War II, when the rating of aviation radio technician was established on 11 December 1942. This rating was re-designated aviation electronics technician's mate on 31 October 1945. Effective 2 April 1948 the name of the rating became aviation electronics technician (AET); the abbreviation was changed to (AT) on 9 June of the same year. A separate rating, aviation electronicsman was absorbed in 1955. The former ratings of aviation fire control technician (AQ) and aviation antisubmarine warfare technician (AX) were absorbed into the AT rating effective 1 January 1991.

Original Fabric Insignia patch with black backing and silver and red embroidery.