Locate your airspeed indicator on the instrument panel of the airplane cockpit. The airspeed indicator is a round dial with pin markings and numbers which increase in a clockwise direction. The airspeed is indicated in knots per hour.
Read your airspeed indicator display to learn your indicated airspeed. If you wish to learn your indicated airspeed without the use of your airspeed indicator, you can perform a mathematical equation to do so.
Calculate your True Airspeed by entering your Calculated Airspeed, outside temperature and pressure altitude into the on-board flight computer. If you do not have an on-board flight computer, you may also use an online true airspeed calculator.
Subtract 2 percent from your true airspeed to obtain your calculated airspeed. Calculated airspeed is regarded as equivalent to indicated airspeed.
