Technical Explanation 

The technical reason for this behavior lies in how limestone cliffs disrupt the drone's Global Navigation Satellite System (GNSS). To calculate its position, a drone measures the precise time it takes for microwave signals to travel from satellites to its onboard receiver. Flat, dense limestone faces act as massive electromagnetic mirrors, reflecting these signals. Consequently, the drone receives the direct signal alongside a delayed, reflected duplicate. This time delay distorts the calculated distance to the satellites, causing the flight controller to compute an inaccurate and constantly shifting position.

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Simultaneously, this reflection causes multi path fading in the radio frequency (RF) control and telemetry links, typically operating on 2.4 GHz or 5.8 GHz. When the direct radio waves from the remote controller and the reflected waves from the rock face meet, they can arrive out of phase. This causes destructive interference, which cancels out the signal. The result is sudden packet loss, dropped telemetry and high latency. This can trigger the drone's automated failsafe or cause it to ignore pilot inputs.

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The final catalyst for a crash is the sensor conflict within the drone's internal flight controller. While the Inertial Measurement Unit (IMU), consisting of internal gyroscopes and accelerometers reports that the drone is stable. The corrupted GNSS data insists the aircraft is rapidly drifting. To reconcile this data mismatch, the flight controller executes aggressive, uncommanded steering corrections. This causes the drone to violently oscillate or drift sideways into the cliff face.

Solution 

To prevent these signal interruptions, it is best to maintain a safe distance of at least 20 meters away from the formation at all times, which reduces the impact of reflected signals on the drone's positioning system. This buffer helps mitigate by allowing the true signals to overpower the weaker reflections.