If you could bring back one discontinued U.S. Navy uniform, which would you choose? The Aviation Working Green, the Winter Working Blue 'Johnny Cash', the Service Dress Blue (Yankee), or the Officers' USN US Navy Chief CPO Service Dress Blue Uniform Coat Jacket w Medals 46 Regular eBay According to the 1975 U.S. Navy Uniform Regulations, the rarely seen Service Dress Blue (Yankee) uniform was for "warm weather afternoon and early evening functions such as yachting parties." The uniform was Congratulations Chief Selectees on this career milestone. Bravo Zulu! . Swipe for CPO uniforms including Service Khaki, Service Dress Whites, Service Dress Blues, and PT Gear your Navy Exchange is