United States Navy Petty Officer 3rd Class Rank Insignia Patch E4, Engineman

Petty Officer Third Class is the first of the Navy's Petty Officer grades, the Navy's variation of non-commissioned officers. It is above Seaman and below Petty Officer Second Class. A Petty Officer Third 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 Third Class serving as a Machinist's Mate, for example, would have the full title of Machinist's Mate Third Class.

Petty Officer Third Class is the 4th rank in the United States Navy , ranking above Seaman and directly below Petty Officer Second Class. A petty officer third class is a Non-commissioned Officer at a grade of E-4.

Enginemen are responsible for internal diesel and gasoline engines. They also maintain refrigeration, air-conditioning, distilling-plant engines and compressors.

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