Unmanned aerial systems (UAS) are shifting from novelty to useful tools in transmission-line construction. Recent pilot programs and operator deployments show drones can rapidly carry pilot ropes, survey corridors, and in some conditions assist with full stringing operations — offering measurable time and risk reductions for difficult spans. Industry analysts and utilities report growing interest as flight permissions and technology mature.

Key advantages

• Faster initial pulls: drones can thread pilot lines in minutes compared to hours in some restricted or flooded sites.

• Lower helicopter dependence: reduces cost and logistical complexity when helicopters are the only alternative.

• Survey + inspection synergy: drones used for stringing can simultaneously capture inspection data, reducing separate mobilizations.

What contractors should consider

• Regulatory & BVLOS approvals are critical — some utilities now have extended beyond-visual-line-of-sight (BVLOS) permissions for stringing work.

• Equipment adaptation: lightweight, low-drag OHTLstringingequipment.com/Stringing-Blocks--Sheaves.html target='_blank'>Stringing Blocks and reinforced quick-attach hardware help drones operate safely.

• Training & insurance: pilots, ground crews, and insurers must agree on operational procedures before live stringing.

Conclusion
Drones will not replace traditional heavy equipment across the board, but they are becoming a powerful supplement for targeted tasks — reducing cost and schedule risk where terrain or access make ground methods slow or unsafe. Expect more hybrid workflows (drone + helicopter + ground equipment) on complex projects in 2025–2026.