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 WEDTREND Women Sparkly Navy Prom Dress Satin A Line V Neck Formal Dress with Sequins Navy Blue Pleated Dress Midi Dress Sleeveless Midi Dress Lulus Elegant Dinner Dress Blue Navy High Quality & Fashionable Halter Neck 2 Pieces High Low Backless Navy Blue Prom Dress, Navy Blue abcprom Navy Blue Halter Front Slit Spaghetti Straps A Line Tulle Prom Dress