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474 - EASA Drone A2 License - What is 'Freezing Fog' (FZFG), and what is the primary risk for a UAS operation in these conditions?

Question 474 - Meteorology - EASA Drone License A2

Fog that only occurs at the North Pole
Fog that turns into snow within 5 minutes
Fog composed of supercooled water droplets that freeze instantly upon contact with the drone, causing rapid and severe structural icing
Fog that is so dense it blocks radio signals entirely

Training tests and timed exam simulations EASA Drone License A2