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 DVIDS Images II MEF HQ Group Navy Dress Blue uniform inspection. [Image 4 of 8] Navy Uniforms: Women's Service Dress Blue, Officer. 1984 Uniform Regulations, Page 4 14 PICRYL Public Domain Media Search Engine Public Domain Search Navy Uniforms: Men's Full Dress Blue, E 1 through E 6. 1984 Uniform Regulations, Page 7 12 PICRYL Public Domain Media Search Engine Public Domain Search