U.S. Navy Officer Service Dress Blue Coat Works Intrepid Museum Dazzling Royal Blue Beaded Sequin Slit Mermaid Prom Dress Lunss Beaded Navy Blue Satin Ruched Long Prom Dress Ohmollydress 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 Trendy Royal Blue V neck Halter Sequins Pattern Floral Prom Gown SREAL Andrina Rhinestone Strapless Gown Royal Blue Debs & Prom Formal Gown Oh Hello Clothing