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 U.S. NAVY FEMALE OFFICER SERVICE DRESS BLUE UNIFORM Army releases message announcing new service uniform Article The United States Army US Navy Enlisted Men's Dress, Blue, A & B Uniform Original U.S. WWI US Navy Gunners Mate Service Dress Blue Uniform Set International Military Antiques