When embroidering on the back of a ball cap, which marking is not authorized?

When considering the procedures for embroidering on the back of a ball cap, the distinction of rank or title is essential. The correct answer relates to the use of the appropriate rating designation and rank title according to Navy standards and regulations.

The term "PO2," which represents Petty Officer Second Class, identifies an enlisted rank. In contrast, the other options present individual names alongside their specific ranks or titles that are authorized for embroidery, such as hospital corpsman, culinary specialist, and a lieutenant commander, which are permissible formats.

Navy regulations outline that the proper marking for ball caps emphasizes the rank of chief petty officer and higher ranks, as well as any required service designations. Therefore, embroidery that indicates non-chief petty officer enlisted ranks, like "PO2," is not authorized for placement on ball caps. This ensures consistency and adherence to tradition within the Navy's dress standards, thus validating why the option representing an enlisted rank is not permitted.