Starlink offers Internet connectivity from satellites in low-Earth orbit. Its sister service Starshield, a military version developed for the Pentagon, relies on the Starlink network and has recently been used by Ukrainian forces to strengthen its far-reaching drone strike missions and air defenses.
Serhiy Beskrestnov, a military technology expert who advises Ukrainian President Volodymyr Zelensky, said speed restrictions had been imposed on the "military package" of Starshield services, leading to the "failure" of several military missions. "Our defense forces have not received any warnings about this restriction," he said. Beskrestnov claimed the restrictions, which he said applied to devices traveling over 100 miles per hour and using Starshield, were "related to the current political situation." He did not offer further details.
Tensions are high between the U.S. and Ukraine, as Zelensky has been vocal in his disapproval of U.S. President Donald Trump’s plan to import diesel from Russia, despite previous sanctions prohibiting it. The move has also caused a split in Trump’s own party, with several Republican lawmakers urging him to reverse course. After making the deal with Russian President Vladimir Putin last week, Trump announced an "energy cease-fire" between Russia and Ukraine—but Zelensky swiftly accused Moscow of violating any such agreement and Ukraine has, in turn, resumed strikes on Russian refineries, despite pressure from Washington.
Speaking from the U.K., Zelensky said it was a "pity" Ukrainian forces had experienced "difficulties" with Starlink services and intelligence, adding that he was surprised by the developments in Ukraine’s partnership with the U.S. In an interview on Piers Morgan Uncensored Wednesday night, Zelensky suggested he believed Starlink had been slowed down to damage him, and warned "people will die, if attacks will continue and if Starlink will not work … it’s not helpful." He said he hoped the restriction was only a "mistake," suggesting it was perhaps "a huge technical problem" at SpaceX.
"Starshield systems are owned and controlled by the U.S. government. Any limits on speed or usage are decided by the U.S. military and ultimately POTUS," he said on X. "Starlink is a commercial service owned and controlled by SpaceX. Usage of Starlink is limited to civilian or defensive activities and cannot be used for offensive military action, as doing so would be inappropriate for a commercial company."
Meanwhile, Ukrainian national news agency Ukrinform reported Thursday, citing sources within the Ministry of Defense, that "the work of Starshield in motion has resumed and continues." A Ukrainian official also told Axios that Ukraine's Starlink and Starshield satellite services had been restored to full capacity.
"In and of itself, satellite communications are not military technology, but it enables the military to communicate and amass a real-time, multi-domain picture of the battlefield, which some argue nobody else actually has at this stage," he says.
"Starlink and Starshield are low on the Earth’s orbit, and they have a very high bandwidth, so lots of information can pass through those satellites, with virtually no delay on the signal," Hilborne says.
There are more than 10,000 satellites in the Starlink network, while Hilborne says Starshield uses "a much smaller number of satellites." However, the exact number of satellites associated with Starshield remains unknown, with experts telling TIME that such details are closely guarded due to national security considerations.
"Starshield refers to military services that actually operate through Starlink," Harrison explains, comparing the services to "two different brands of a cell phone provider, even though your phone calls are going through the same towers."
"It's got another extra set of capabilities over and above Starlink," Hilborne says. "They use some of the same technologies, but it would be highly encrypted, and they have different sensors that allow them to image what they call ‘Earth observation.’ That can give a radar imaging of the Earth [which] has advantages over optical pictures."
Hilborne describes the technology as "highly critical" to Ukraine, explaining that any restrictions could cut communications with military equipment traveling above that speed, leaving operators without the information needed to guide their missions, as once that speed threshold is exceeded, the connection "suddenly cuts off and it's flying blind," he says.
