"Skipper", an FPV company commander in Ukraine's 413th Raid Unmanned Systems Regiment, has described destroying a Russian UR-77 mine-clearing vehicle with drones during the 2023 counteroffensive as the strike he is proudest of, according to Army TV.

The UR-77, nicknamed "Zmiy Horynych" after a fire-breathing serpent of Slavic folklore, carries a rocket-fired line charge to blow paths through minefields, as per Militarnyi. Each charge carries more than two tons of explosives, which is why a cheap FPV hit can trigger a blast far larger than the drone itself.

"It exploded so hard that I thought it was a small nuclear blast. There are more than two tons of plastic explosive inside, and when it went off after the second hit, it was something unbelievable," Skipper says.

Skipper joined the army at the start of the full-scale invasion and moved from infantry and aerial reconnaissance to commanding an FPV unit. His regiment now operates on the Zaporizhzhia front, where FPV drones conduct combat missions.

From sailing yachts to FPV drones

In civilian life, Skipper was a sailing instructor, and he says the sport partly helps in military work, especially his knowledge of navigation and radio communication. He is convinced that a technological edge can be one of the keys to victory.

He counts the UR-77 strike among his unit's early work, from a time when few Ukrainian units were using FPV drones at all, he says. The hit came during hard fighting in the counteroffensive, when his crews were among the first to work the FPV niche.

Russia turns a mine-clearer into a wrecking tool

The UR-77 was built in the 1970s for a different war, one of fast tank thrusts that needed enemy minefields cleared quickly. Its base rides on the chassis of the 2S1 Gvozdika self-propelled howitzer, and its charge can cut a lane six meters wide, with some anti-personnel mines detonated across a band up to 15 meters wide.

Modern combat changed that role. The classic mine-clearing use remains, but Russia now more often turns these machines on Ukrainian fortifications, using the line charge to flatten defenses rather than open a path.

Ukraine's 413th Separate Raid Regiment of the Unmanned Systems Forces struck the Snizhne Machine-Building Plant in occupied Donetsk Oblast in September, working with other Defense Forces units, the regiment posted on 6 October, sharing a video of the strike. The General Staff reported the strike on the plant on 11 September, saying that the extent of the damage was being clarified.

The strike adds to Ukraine's campaign of long-range attacks on Russian military targets as Russia has begun its winter campaign of strikes against Ukraine's energy infrastructure. Hitting the suppliers of aircraft parts goes after Russia's ability to keep its attack jets and helicopters flying.

The regiment said the plant works for Russia's military industry, producing engine components for attack aircraft and combat helicopters.

A former Motor Sich plant in occupied Snizhne

The Snizhne plant was a separate division of Motor Sich, a Ukrainian aircraft-engine maker based in Zaporizhzhia, a city that remains under Ukrainian control. Snizhne has been under Russian occupation since 2014. The plant specializes in producing parts for gas-turbine engines, including compressor and turbine discs and blades, the General Staff said. It never built whole engines. In September 2014, months into the occupation, it was machining blanks from Motor Sich's Zaporizhzhia plant into turbine blades and was one of only two plants in the former Soviet Union making such blades for helicopters, a plant worker said.

Motor Sich said in December 2017 that it had lost control of the plant. Weeks later, Viacheslav Bohuslaiev, then Motor Sich's honorary president and a member of parliament, told RFE/RL's Donbas.Realii that Motor Sich still owned the plant and had handed its management to a foreign company, while keeping it under the company's "full control."

In February 2023, Ukraine's Prosecutor General's Office served Bohuslaiev a notice of suspicion of aiding a terrorist organization, alleging that Motor Sich shipped blanks to the Snizhne plant and received finished engine parts through foreign-registered companies. The case went to court in October 2023, and Bohuslaiev, who denies the charges, has been in pretrial detention since October 2022 as the trial continues.

Snizhne, which Russia uses as a rear base, has been hit before. In May, Ukraine's Unmanned Systems Forces and the Security Service of Ukraine struck a Russian training center for drone pilots in the city, and in September, a strike on energy infrastructure cut power across Snizhne.