How much do you increase your final approach speed with a wind speed reported at 10 knots gusting to 18 knots?

• A. 4 KIAS
• B. 8 KIAS
• C. 10 KIAS
• D. No increase required

Answer: (A)

When calculating the increase in final approach speed due to wind, the primary focus is on the impact of gusty winds on maintaining control of the aircraft during landing. In this scenario, with a wind speed of 10 knots gusting to 18 knots, it is crucial to consider the gusts, rather than just the steady wind component.

The recommended approach in such conditions often involves adding approximately half of the gust factor to the final approach speed. The gust factor here can be identified as the difference between the steady wind speed and the peak gust. In this case, that difference is 18 knots (gust) minus 10 knots (steady wind), which results in an 8-knot gust factor.

Applying the guideline, you would take half of this gust factor—half of 8 knots equals 4 knots. Consequently, you would increase your final approach speed by 4 knots indicated airspeed (KIAS) to ensure a stable and controlled approach, which allows for better handling characteristics in changing wind conditions. Thus, the correct answer reflects this calculation and reasoning, ensuring that pilots maintain adequate control throughout the landing phase amidst gusty winds.