Courses and directions · Question 12 of 12
Track 090°, true airspeed 100 kt, wind 360° at 20 kt. Approximately what heading and groundspeed result?
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Answer
- D Heading 078°, groundspeed 98 kt
Explanation
The wind comes exactly from the left. The wind correction angle is arcsin(20/100) ≈ 11.5°, so the heading is about 078°. Because part of the airspeed acts against the crosswind, the groundspeed drops slightly to 100 × cos 11.5° ≈ 98 kt.