Tenné, three staffs raguly palewise couped and erased Argent; on a chief of the like two lightning flashes saltirewise of the first.
That for the regiments and separate battalions of the South Carolina Army National Guard: On a wreath of the colors, Argent and Tenné, upon a mount Vert a palmetto tree Proper charged with a crescent Argent.
Orange and white are the colors traditionally associated with the Signal Corps. The staff raguly is a heraldic symbol for a tree trunk or pole. The pole supports communication lines. The tree trunk refers to the palmetto tree on the State flag of South Carolina, the home area of the unit's headquarters. Hence, the staffs symbolize support for the mission of the Army and in turn support for the defense of the State. The three staffs likewise suggest the unit's numerical designation. The lightning flashes refer to the multidirectional speed of electronic communications.
The coat of arms was approved 29 Jan 1982.