CANARD Drones Completes Inspection of PAPI Systems at Madrid Airport by DRONELIFE Staff Writer Ian M. Crosby Spanish company CANARD Drones, the leader in drone-based solutions for navigation aids systems and airport inspections, has completed the verification and calibration service of PAPI (Precision Approach Trajectory Indicator) systems and the inspection of runway … [Read more...] about Drones at Airports, Saving Time and Money: CANARD Drones Inspects PAPI Systems at Madrid Airport