_The Blue Service Coat_ is made of dark blue cloth or serge, with a standing collar, single-breasted, extending to about ten inches below the waist, trimmed around the collar, down both front edges, around the bottom and up the side seams of the back with black mohair braid one and one-quarter inches wide. The sleeves bear the same gold stripes indicating the rank of the wearer as those on the full dress coat, and on both sides of the collar are embroidered the insignia of rank with the insignia indicating Line or Staff in rear of it. These insignia for commissioned officers of the Line are as follows: _Captain Commandant_ A silver spread eagle with a shield upon his breast. _Senior Captain_ A silver oak leaf. _Captain_ A gold oak leaf. _First Lieutenant_ Two silver bars. _Second Lieutenant_ One silver bar. _Third Lieutenant_ No insignia of rank, the Coast Guard insignia only being worn. The Coast Guard insignia worn on the collar by commissioned officers of the Line consist of a silver foul anchor surcharged with a gold shield. Officers of the Staff Corps (Engineers and Constructors) wear the insignia of rank of their corresponding rank in the Line and instead of the Coast Guard insignia worn by the Line officers they wear the insignia of their corps, as follows: _Engineer Officers._—A silver foul anchor surcharged with four gold oak leaves. _Constructors._—A silver foul anchor surcharged with a branch of gold leaves. _The White Service Coat_ for commissioned officers is a single-breasted coat of the same length as the blue service coat, with standing collar, buttoned with a single row of five Coast Guard gilt buttons, and having on each breast a pocket with a flap buttoned by a small gilt button. Shoulder marks indicating the rank and corps of the wearer are worn with this coat. _Shoulder Marks._—The shoulder marks worn on the shoulders of the white service coat and also upon the shoulders of the overcoat to indicate the rank and corps of the wearer are five inches long and two and a quarter inches wide, covered with dark blue cloth, and decorated with gold stripes and corps insignia to indicate the rank and corps of the wearer, these stripes and insignia being the same for the various ranks and corps as those worn on the sleeves of the full dress coat as previously described. _The Blue Service Cap_ is of the same shape and design as the full dress cap except that the braid around the band is of black mohair and the visor is made of black patent leather, the decorations on the visor for the Captain Commandant, Senior Captains, Captains, Engineer in Chief and Captains of Engineers being of gold embroidery the same as for the full dress cap. _The White Service Cap_ is of the same shape and description as the blue service cap except that the sides and crown above the band are of white duck.