for completing qualifications in various fields within the Navy. They are worn on the left side of the uniform in the primary position (for one insignia), or the primary and secondary position (for two insignia). Only two of this class of breast insignia may be worn at one time. The primary position is centered above ribbons or medals with the lower edge of the device 1/4 inch above the top row of ribbons or medals. When no ribbons or medals are worn, it is centered above the left pocket with the lower edge of the device 1/4 inch above the top of the pocket. The secondary position is centered 1/4 inch below the top of the pocket or pocket flap, when ribbons or no awards are worn. When medals are worn, centered below medals with the top of the device 1/4 inch below the lowest row of medals. Warfare and Other Qualification insignia are grouped in the following categories (in alphabetical order): "Warfare" insignia take precedence over "Other" insignia and are placed in the primary position. If two Warfare insignia are authorized for wear, insignia of the specialty in which currently serving will be worn in the primary position. Personnel with multiple qualifications may wear only two insignia. Since September 2009, personnel with multiple designators within a single community (for example, an aviation officer who has earned both Naval Aviator and Naval Flight Officer qualifications) may wear both insignia, with their current billet's insignia on top. Listed below are all the Warfare and Other Qualification insignia within each category. Warfare Qualifications Aviation Warfare Aviation Warfare insignia (usually called "wings") are breast insignia of the aviation warfare community which are issued to those naval personnel who are trained and qualified to perform duties related to operation and support of naval aircraft. There are two variants for line officers: Naval Aviator insignia for pilots, and Naval Flight Officer insignia for officers performing weapons systems officer, electronic countermeasures officer, navigator or similar functions. There is also an astronaut version of each of these insignia, known as the Naval Astronaut and Naval Astronaut (NFO), respectively. The Enlisted Aviation Warfare Specialist (EAWS) insignia is earned by sailors who demonstrate an in-depth knowledge of Naval Aviation. The EAWS designation may be earned by both enlisted Naval Aircrew and non-flying enlisted support personnel in Naval Aviation. EAWS status does not require any sort of actual flight experience