Cockpit reading is a term used to describe the information that pilots must monitor while flying an aircraft. This includes SPEED, ALTITUDE, and airspeed, which are all measured in the cockpit. SPEED is the rate of motion of an object, usually measured in knots or miles per hour. ALTITUDE is the height of an object above sea level, usually measured in feet. Airspeed is the SPEED of an aircraft relative to the air around it, usually measured in knots.