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481 - EASA Drone A2 License - In meteorology and space weather planning, why is a high 'K-index' (Kp 5 or higher) a significant concern for the automated flight modes of a drone?

Question 481 - Meteorology - EASA Drone License A2

It indicates a high probability of heavy snowfall
It means the air density is too high for efficient propeller rotation
It signals a geomagnetic storm that can cause severe GPS positioning drift or sudden loss of satellite lock
It signifies that the wind speed at 120 m is exactly 50 knots

Training tests and timed exam simulations EASA Drone License A2