History of the USN officer's blue yankee uniform? UNIFORMS U.S. Militaria Forum Men's U.S. Navy Service Dress Blue Jacket The Complete Navy Uniform Guide for Military Portraits 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 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 U.S. Navy Officer's, Warrant Officer's, and Chief Warrant Officer's Blue Service Coat