Service Dress Blue (Yankee) uniform was for "warm weather afternoon and early evening functions such as yachting parties." The uniform was formally phased out in 2011 : r navy U.S. NAVY MALE OFFICER DINNER DRESS BLUE JACKET UNIFORM Us navy dress uniform hi res stock photography and images Alamy U.S. NAVY MALE CPO ENLISTED DINNER DRESS BLUE JACKET UNIFORM United States Air Force Male Officer Dinner Dress