A flight instrument is a device used in an aircraft to provide essential information to pilots about the aircraft's performance and environment. These instruments display data such as altitude, speed, heading, and attitude, helping pilots navigate and maintain control during flight. Common flight instruments include the altimeter, airspeed indicator, and artificial horizon. Flight instruments are crucial for safe flying, especially in poor visibility conditions. They are typically grouped into two categories: primary flight instruments, which provide real-time data necessary for flying, and secondary instruments, which offer additional information for navigation and system monitoring. Proper understanding and use of these instruments are vital for effective flight operations.