EASA NAV(A)intermediate
Match each navigation quantity to its corresponding calculation or definition: 1. Time 2. Distance 3. Groundspeed 4. Wind Correction Angle (WCA) A. Distance divided by groundspeed B. Groundspeed multiplied by time C. Speed of the aircraft relative to the Earth's surface D. Heading correction applied to counter wind drift
Answer
1 - A, 2 - B, 3 - C, 4 - D
Explanation
These relationships are central to navigation calculations. Time and distance must be calculated using the speed relevant to the ground track. WCA corrects heading to maintain the desired track despite crosswind. **Key takeaway:** Keep route, heading, and speed quantities distinct.\n\n**Glossary:** **Track**: actual ground path; **heading**: direction the aircraft points.
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