A Russian fiber-optic-controlled first-person view (FPV) drone made a precision strike within the city of Kramatorsk for the first time on Sunday, the city council said. Though no one was injured in the attack, a fiber-optic FPV drone strike on one of the largest cities in the east raised alarms in Ukraine. Unlike radio-controlled drones, FPV drones that link to their controllers via very long spools of fiber-optic wire are immune to jamming and terrain features that can impede line-of-sight radio signals. While they also have disadvantages, such as having a range defined by the length of the wires they trail and degraded freedom to maneuver, they are hugely threatening due to their resiliency. And the range at which they can reach out is only increasing.

Kramatorsk was home to about 200,000 people before Russia’s all-out invasion, but that has dwindled to about half that population. Located 12 miles from the front lines in Ukraine’s war-torn east, Kramatorsk has come under increasing attack from Russian radio-controlled FPV drones. Boosting the range of Russia’s fiber-optic-controlled FPV drones extends the depth of the front lines and increasingly puts civilians at risk. “One strike and one damaged car will not change the security situation on the front line or directly in Kramatorsk, but it demonstrates a trend,” the Ukrainian Radio Liberty media outlet reported. “However, firstly, the Russian troops have demonstrated the reach and vulnerability of the administrative center of Donetsk Oblast to fiber optic. Secondly, if strikes with different types of FPV are scaled up, we can talk about a threat to civilian and military logistics in order to create the prerequisites for a future offensive…” The video feed from the drone itself is incredibly clear, which is a major feature of this class of FPV drone. On the other hand, a radio-controlled one would have an intermittent video feed dominated by static due to the great distance from its controllers and especially amongst tall buildings and general urban terrain. The video shows the drone flying over a relatively pristine street in Kramatorsk, before making a sharp turn to the left and striking a pickup truck — much like the ones many Ukrainian troops use — parked near an apartment building.

Both sides have developed fiber-optic-controlled FPV drones that can now reach as far as 25 miles, but generally, those in operation fly a fraction of that distance carrying much smaller spools of wire. Still, efforts to extend the range to more than 30 miles are underway now, which could be highly problematic for forces operating deep behind enemy lines and civilians, as well. It’s worth noting that the Russians started the use of fiber optic wires on the FPV drone in the spring of 2024, and Ukraine quickly followed suit. You can read more about that in our original story here. The use of fiber optic cables to transmit the guidance data between the controllers and the FPV drones has become so prevalent on both sides that fields once used for farming are now covered in the strands.

The increasing range of Russia’s fiber-optic-controlled FPVs is worrisome to one of Ukraine’s major players in drone development and production efforts. “The enemy’s FPV drones can fly even greater distances,” Serhii Sternenko warned on X. “There is no such thing as a rear area up to 30 kilometers (about 18.5 miles) from the front. This needs to be realized now, especially by local officials.” Sternenko is urging Ukrainian city leaders to adopt new defensive measures to protect civilians. “All settlements in this zone should already be closing roads with anti-drone nets,” he suggested. You can see a driver’s view of traveling through one such system in the following video. These nets are a measure first introduced by Russia and later adopted by Ukraine to create miles-long ‘tunnels’ designed to protect military transport vehicles from drone attacks. Russia has even designed a system to protect buildings with nets. In addition, Sternenko wants civilian movement on the streets to be limited and ultimately have non-combatants evacuated. “It will only get worse, because technology doesn’t stand still,” he posited.

Though fiber optic cables increase the range of FPV drones, there are also limitations, as we have previously discussed and touched on at the opening of this article. The extra weight of the large spools needed to operate over long distances slows them down and makes them less maneuverable. In addition, environmental factors come into play, the head of Ukraine’s defense tech incubator recently told us. Just because such a drone can reach 25 miles doesn’t mean it will. “It depends on what we are measuring, the length of the fiber optics, or the distance between the ground station and the target,” Andriy Hyrtseniuk, the new head of Ukraine’s Brave1, told us. “It’s two different stories because, because of the wind, the fiber optics is moving,” reducing the range of these drones. Still, given the advantages offered by longer fiber optic cables, both sides are in a race to increase their distance, Hyrtseniuk explained. “This is very similar to the game of cat and mouse, and the innovations are enhancing [the range] very, very quickly,” he stated.

Ukraine was slower to develop the fiber-optic-controlled FPV drones, but it is catching up. “This is actually one of the very few areas where Russia was faster than we were, but we are very quickly reducing the [gap],” he posited. “And right now, more than 35 Ukrainian companies are building the fiber optic drones and have scaled their production. So right now we are comparable with Russia.” “Of course,” he added, “we and the Russians are working on the increasing distance and increasing lengths of the fiber optics…I don’t want to give more detailed information about fiber optics, but the level of 40 kilometers (about 25 miles) was completely reached, and it works.”

There has been very little movement on the front lines, providing Ukraine a degree of security within a dozen or so miles from them due to Russia’s lack of air superiority.

uh, yeah, I'm sure the guys getting bombed in Kiev and recently Lvov are really feeling that security

But AI-infused drone technology, using Ukraine’s own telecom network to control long-range drones far beyond the front, and long-range fiber optic drones could disrupt this delicate balance. We discussed how AI-enabled Shaheds could have a massive impact on the war in a story we wrote last year. Even putting nearby towns at risk of highly resilient fiber-optic FPVs could have major impacts, especially on both sides’ ability to supply troops at the front. So far, Kramatorsk is battered, but 100,000 people still call it home. Right now, cable-guided FPV drones are an emerging threat to this city. However, as we have seen across the battlefield, the ability to extend the range of these weapons makes defending against them even harder.