Attitude indicators, also known as horizon reference systems, are crucial instruments for pilots to maintain proper orientation and control of an aircraft. Some synonyms for attitude indicators include gyro horizon, artificial horizon, and flight director system. Other related terms include attitude and heading reference systems (AHRS), electronic attitude indicators, and attitude gyros. The purpose of these instruments is to provide accurate and reliable information about the aircraft's position relative to the horizon, as well as other critical parameters such as pitch, roll, and yaw. In short, attitude indicators serve as the pilot's virtual eyes, helping them navigate the skies safely and effectively.