Elegant Sydney Navy Maxi Dress Perfect for Formal Events & Weddings Large Royal Blue Velvet Maxi Dress Long Sleeve Elegant Velvet Gown Handmade Fall Winter Formal Dress Women Custom Dress Velvet Party Dress Etsy Sexy Royal Blue Prom Dress, Long Sleeves Prom Dress with Split Front Hoprom Royal Blue Long Sleeve Slim Fit Mermaid Prom Dress Xdressy 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