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The drone industry is entering a new phase driven by the pursuit of greater autonomy, energy efficiency, and sustainable operations. In this context, hydrogen fuel cell–powered drones are emerging as one of the most promising technologies for long-endurance flights, significantly surpassing the limitations of systems based solely on batteries.

Autonomy has historically been one of the main obstacles to the prolonged use of drones in surveillance and monitoring tasks. However, a technology that is rapidly gaining ground promises to change this paradigm: tethered drones. This solution enables continuous aerial operations for hours—or even days—eliminating dependence on traditional...