A flight instrument known as a Attitude Indicator. It shows the aircraft's relationship to the actual horizion. It measures pitch and roll. 姿態指示器 陀螺 horizion 人工 horizion 姿態指示器
This is an example of some of the newer electronic flight display used on general aviation aircraft. The instrument shown tells the pilot the airspeed, attitude, and altitude of the aircraft. Many displays provide much more information, but too much info is not good, so I simplified this to display only the basics. 電子飛行儀錶系統 電子顯示幕 飛機飛行儀錶 EFIS 面板