What is the crosswind component for landing on Runway 18 if the tower reports wind at 220° at 30 knots?

To determine the crosswind component for landing on Runway 18, which is aligned at 180°, we need to analyze the wind direction and speed. The tower reports the wind coming from 220°, which is to the southwest.

The first step is to calculate the angle between the wind direction (220°) and the runway heading (180°). This angle is 40° since 220° - 180° = 40°.

Next, we can use the formula for calculating the crosswind component:

Crosswind Component = Wind Speed × sin(angle)

Substituting the values, we perform the following calculation:

Crosswind Component = 30 knots × sin(40°)

The sine of 40° is approximately 0.643. Therefore:

Crosswind Component = 30 knots × 0.643 ≈ 19.29 knots.

Since the options provided round this result, the closest value is 19 knots. This demonstrates how the calculation of the crosswind component requires understanding both trigonometry and the orientation of the wind relative to the runway. Thus, the result is effectively rounded to 19 knots, which aligns with the choice provided.