The US military has gone ahead and taken the step of adding an untethered military drone to its growing fleet of battle drones.
This particular system makes use of a special ground station that can be hooked up to any power source, whether it's a power generator or indeed a vehicle. It can connected to an autonomous drone by making use of a kevlar micro-filament which is more than capable of providing all the energy required for highly long-distance flights that can last for several days at a time. The tether system also acts as a communucations mechanism to allow high-definition video captured by the drone to be transmitted back to ground stations.
This tethered military drone ultimately aims to expand and enhance the US military's communicative capacities.
This New Drone Uses a Communication Tether For Enhanced Utility
Rahul Kalvapalle — July 28, 2016 — Tech
References: cyphyworks & gizmag