they may also wear their Dinner Dress uniform, which is the traditional Service Dress "sailor suit", with miniature medals instead of ribbons. Service uniforms 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. Officers and chief petty officers Service Khaki 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 an officer's working uniform on all ships in 1941. The Service Khaki uniform today is reserved for officers and enlisted sailors at chief petty officer and above. It is a short-sleeved khaki button-up shirt and matching trousers, worn with a gold belt buckle. The shirt features two front flap pockets and an open 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. Headgear consists of either a combination cap with a khaki cover or a khaki garrison cap. Currently black and brown oxford shoes are authorized for all officers and CPOs, though traditionally brown shoes are worn only by aviators. Females are authorized to wear the same over-blouse as junior enlisted sailors. The uniform is also worn by cadet officers and cadet chief petty officers in the Navy Junior ROTC. Summer White Service The Summer White Service uniform (formerly known as Tropical White Long and nicknamed the "milkman" and "Good Humor" uniform) consists of a short-sleeved, open-collared white button-up shirt, white trousers and belt, and white dress shoes. Authorized headwear is the combination cap. Officers wear shoulder boards with this uniform, while chiefs wear metal collar insignia. The women's shirt for all ranks has shoulder straps, but carry nothing except for shoulder boards worn by officers. Like Service Khakis, Summer Whites are available in several materials (poly/cotton and Certified Navy Twill). When assigned as the Uniform of the Day, a Plan of the Day/Plan of the week will state "Summer