denoted by the insignia on their shoulderboards in all "blues" uniforms, including "blues", service dress, overcoats, mess dress and parade dress. All cadet shoulder boards carry the heraldic nebuly device, (commonly referred to as "clouds" by cadets). Third class cadets have one thin bar (ground) underneath the clouds; second and first class cadets wear two thin bars, one each above (horizon) and below the clouds. Additional chevrons denote cadet non-commissioned officer ranks, while additional bars denote cadet officer ranks. An exception to this is the unranked cadets, who are on probation of some kind (academic, athletic, military, honor, etc.). For unranked third class cadets, only ground and cloud are present; for unranked second class cadets only ground, cloud, and horizon are present; for unranked first class cadets only ground, cloud, horizon and one thin bar are present. Vertical diamonds on the boards of second class cadets indicate either squadron or group superintendent positions. Horizontal diamonds on the same indicate squadron first sergeant positions. Stars on first class cadet boards indicate either flight, squadron, or group command positions. If multiple stars are present, the cadet is either the vice wing commander (two stars), or the wing commander (three stars), the senior cadet in the Wing. The only second class cadet rank with a star present is the Wing Command Chief, the senior second class cadet. On the current Operational Camouflage Pattern, Air Force Academy cadets wear soft spice brown rank insignia on the center of the chest. Formerly, Air Force Academy cadets wore metal blue bars or chevrons on the lapels of the (now retired) Battle Dress Uniform and Airman Battle Uniform to denote their rank. While fourth class cadets wear no insignia on combat uniforms, they are awarded a Prop and Wings after recognition, to be worn on the flight cap and on the lapels of service dress. Third class cadets wear one or two chevrons on each lapel, signifying that they are cadet/staff sergeants or cadet/technical sergeants, respectively. Second class cadets wear three to five chevrons, indicating ranks from cadet/master sergeant to cadet/chief master sergeant. First class cadets function as cadet officers and wear one to six bars on their lapels, corresponding to ranks from cadet/second lieutenant to cadet/colonel. U.S. Naval Academy (Annapolis) and U.S. Merchant Marine Academy (Kings Point) The rank insignia of the United States Naval Academy and the United States Merchant Marine Academy is a combination