To correct possible airspeed errors, which chart should be consulted?

• A. Airspeed calibration chart
• B. Altitude vs. airspeed chart
• C. V-speed chart
• D. Engine power chart

Answer: (A)

Airspeed indication can be off because of instrument and installation errors, so you use the airspeed calibration chart to fix those inaccuracies. This chart shows how indicated airspeed relates to calibrated airspeed (and often true airspeed) across different altitudes and conditions. By locating your current altitude and reading the indicated airspeed, the chart lets you determine the corrected speed you should actually be using for performance and safe operation. The other charts don’t address instrument or installation errors—they cover altitude effects on speed, standard operating speeds, or engine performance, not corrections to the airspeed readings.