U.S. Navy Officer's, Warrant Officer's, and Chief Warrant Officer's Blue Service Coat U.S. NAVY ENLISTED SERVICE DRESS BLUE UNIFORM (E1 E6) File:US Navy 091105 N 0718S 051 Sailors from the Center for Information Dominance Detachment Monterey stand in formation while waiting to be inspected in their service dress blue uniform.jpg Wikimedia Commons History of the USN officer's blue yankee uniform? UNIFORMS U.S. Militaria Forum Male Enlisted Full Dress Blue File:US Navy 080807 N 7090S 012 Yeaoman (SW) 1st Class Dru Maclin models the new E 6 and below Service Uniform (SU). The SU is for year round wear and replaces summer white and winter blue uniforms.jpg