<P> Those holding the rank of Lieutenant and below have the option of using the Dinner Dress uniform when Dinner Dress Jacket is prescribed . The enlisted sailors who are Chief Petty Officer and above wear a uniform similar to the officers, but with rank insignia and service stripes on the left sleeve . While enlisted who are Petty Officer First Class and below have optional Dinner Dress Jacket uniforms similar to the officers and chiefs, they may also wear their Dinner Dress uniform, which is the traditional Service Dress "sailor suit", with miniature medals instead of ribbons . </P> <P> Service uniforms are the U.S. Navy's daily wear uniforms, and exist in several variations . They are intended for use in office environments, in positions that interact with the public, and in watch situations . Skirts are authorized for women in all service uniforms . </P> <P> The Navy first authorized a khaki uniform in 1913 as a practical garment for early naval aviators; they were given permission to wear Marine Corps khaki uniforms with naval insignia, when flying or working on aircraft . Khakis were authorized aboard submarines in 1931 and as a working uniform on all ships ten years later . </P> <P> The Service Khaki uniform today is reserved for commissioned officers (grades O - 1 through O - 10), chief warrant officers (current grades W - 2 through W - 5, W - 1 not in use) and chief petty officers (grades E-7 through E-9). It is a khaki button - up shirt and trousers, worn with a gold belt buckle . The shirt features two front flap pockets and a pointed collar . Ribbons are worn above the left pocket of the shirt, with the warfare insignia above them . A nametag may be worn above the right pocket, and rank insignia is worn on the collar . The regulations for ribbons state the highest three awards, or all ribbons can be worn at once . There are two kinds of headgear authorized: a khaki combination cap is standard, but a khaki garrison cover is also authorized . Currently black and brown oxford shoes are authorized for all officers and CPOs . However, tradition and social pressure tend to restrict the wearing of brown shoes to members of the aviation community . Females are authorized to wear the same over-blouse as junior enlisted sailors . </P>

When were khakis first introduced in the navy