GSCS Gas Turbine System Technicians Mug. This mug is decorated with the Gas Turbine System Technicians E8 insignia bracketed with the U.S. Flag and a Navy anchor. A great gift idea. "Gas Turbine System Technicians are responsible for all gas turbine engines. They maintain propulsion machinery, including gears, shafting and controllable pitch propellers, assigned auxiliary equipment propulsion control systems, electrical and electronic circuitry up to the printed circuit module, and alarm and warning circuitry. They handle administrative tasks related to gas turbine propulsion system operation and maintenance" --Wikipedia.