A three-dimensional “bow tie” geofence will soon prevent DJI’s drones from being able to fly too close to major European airports. While the company’s drones have included geofencing technology since 2013, the new tech, developed by aviation tech company Altitude Angel, expands the restricted zone from a simple two-dimensional circle to a much larger three-dimensional zone.

The announcement comes after drone sightings caused Gatwick, the UK’s second-largest airport, to shut down in the run-up to Christmas, grounding hundreds of flights. Although a local couple was arrested by police, they were later released without charge. As a result, we still don’t know who was responsible or which drone brand was used. Both Gatwick and Heathrow airports have also purchased their own anti-drone systems in the wake of the disruption.

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