An attitude indicator is an essential instrument used in aircraft to display the orientation of the plane relative to the horizon. It shows whether the wings are level or if the aircraft is climbing, descending, or turning. This information helps pilots maintain control, especially in poor visibility conditions. The attitude indicator typically features a miniature airplane symbol that represents the aircraft, set against a background that indicates the horizon. This allows pilots to quickly assess their flight position and make necessary adjustments. It is a critical component of the aircraft's avionics system, ensuring safe and effective navigation.