Methods and devices for generating a stereoscopic image are described. A handle is provided at a front side of the lid assembly. The AFCS may maintain the constant AOA despite changing air data parameters by increasing or decreasing the thrust of the aircraft, the pitch angle of the aircraft, or the angle of incidence of the aircraft wing. It also provides a valuable exercise mechanism for those trying to improve their physical health. The locations of the markings are determined by considering various factors, including the inner shank circumference, the number of gemstone sizes, and the number of non-marking areas.