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 Left, men's Formal Dress uniform with Blue Mess Jacket and white tie for officers. Center, men's Unusual Navy enlisted formal uniform (ATC) NAVAL & SEA SERVICE UNIFORMS U.S. Militaria Forum DVIDS Images Senior Navy enlisted test drives new uniforms [Image 5 of 5] Framed U.S. Navy Evening and Dinner Dress Blue Uniforms 1967 by Hugh Charles McBarron