day with full dress (No. 1), which is worn in a modified form by admirals today as ceremonial day dress. Both the undress tailcoat and the mess jacket are double-breasted, with peaked lapels and six gilt buttons, but cut to be worn single-breasted and fastened at the front with two linked gilt buttons. The undress tailcoat is fitted with scallop-flapped hip pockets with three gilt buttons on each pocket. Rank is indicated on the undress tailcoat and mess jacket by gold lace on the sleeves. When tropical rig is ordered, a white, double breasted mess jacket with a shawl collar is worn instead of the blue, with shoulder boards to indicate rank. The peaked cap can (optionally) be worn with both mess undress and mess dress. Senior rates-Warrant Officers (of both grades), Chief Petty Officers and Petty Officer- may either wear their Number 1 Dress uniform with a bow tie and medal ribbons, or they may optionally wear a navy blue mess jacket with shawl collar that is worn with the black cummerbund and a white Marcella shirt and navy blue mess trousers. The relevant cuff buttons indicating rate are worn by Petty Officers and Chief Petty Officers, and miniature rate badges are worn on the upper left arm of the mess jacket by petty officers, and on the sleeve by both grades of Warrant officers. Trade badges are not worn in this rig. In tropical climates, either a white bush jacket (as in number 1 rig) is worn with medal ribbons, or optionally; a white mess jacket similar to that worn by officers is optionally worn, only without shoulderboards. Mess dress and mess undress are today worn with a soft marcella-fronted shirt with a soft collar. Stiff marcella-fronted shirts and stiff wing collars were previously worn with all forms of evening dress, but were abolished first for mess undress, and finally in the mid-1990s for mess dress. Rear admirals and above may continue to wear the stiff shirt and collar with mess dress. Cummerbunds, which may be worn with mess undress instead of the blue waistcoat and with Red Sea rig (No. 2C), are frequently decorated with badges or colours proper to the ship or establishment in which the officer serves. For example, HMS Glasgow – Black Watch tartan; HMS Illustrious – green with the ship's logo (three crossed trumpets) in gold; Royal Naval Engineering College (RNEC) – engineers'