A widespread failure of SpaceX’s Starlink satellite system last August left U.S. Navy personnel conducting unmanned vessel trials with two dozen autonomous boats stranded off California’s coastline, according to internal military documents obtained by Reuters.
The global disruption of Elon Musk’s satellite constellation affected millions of users worldwide and forced Navy operators to suspend their drone testing for nearly an hour when communications were severed. The trials involved autonomous vessels designed to strengthen American military capabilities in potential conflicts with China.
Internal Navy records reveal this was among multiple testing interruptions caused by Starlink connectivity problems, preventing military personnel from maintaining contact with their unmanned maritime platforms.
SpaceX is preparing for what could become the largest initial public offering in history this summer, with the company valued at approximately $2 trillion. The aerospace firm has established itself as the world’s premier space enterprise by becoming essential to U.S. government operations through satellite communications, rocket launches, and military artificial intelligence systems.
The company’s Starlink service has become integral to vital defense programs ranging from autonomous vehicles to missile detection systems, operating nearly 10,000 satellites in low-Earth orbit. This massive network provides the military with communications infrastructure designed to withstand attacks from hostile nations.
However, the Navy’s technical difficulties with Starlink during drone operations, previously unreported, underscore the potential dangers of the Pentagon’s increasing dependence on SpaceX technologies.
“If there was no Starlink, the U.S. government wouldn’t have access to a global constellation of low earth orbit communications,” said Clayton Swope, a deputy director of the Aerospace Security Project at the Center for Strategic and International Studies.
Pentagon officials declined to address questions regarding the drone testing or SpaceX’s naval partnerships. Kirsten Davies, the Pentagon’s chief information officer, stated the “Department leverages multiple, robust, resilient systems for its broad network.”
Neither the Navy nor SpaceX provided responses to inquiries about these incidents.
While Amazon.com announced an $11.6 billion deal this week to purchase satellite manufacturer Globalstar, SpaceX maintains its dominant position in low-Earth orbit communications technology.
SpaceX has established virtual dominance in space launches while providing satellite connectivity through Starlink and its defense-oriented Starshield network, generating billions in revenue. The U.S. Space Force announced last month it had transferred its upcoming GPS satellite launch to a SpaceX rocket for the fourth consecutive time, citing technical problems with the Vulcan rocket developed by United Launch Alliance, a partnership between Boeing and Lockheed Martin.
Democratic members of Congress have cautioned the Pentagon about the dangers of depending heavily on a single corporation controlled by the world’s wealthiest individual for essential national security functions. The Defense Department’s recent conflicts with AI company Anthropic demonstrated how over-reliance on one technology provider can create operational vulnerabilities.
Reuters previously reported that Musk abruptly disabled Starlink access for Ukrainian forces attempting to reclaim territory from Russian troops, damaging international confidence in the tech billionaire.
In Taiwan, SpaceX received criticism for allegedly denying satellite communications to American military personnel stationed there, “possibly in breach of SpaceX’s contractual obligations with the U.S. government,” according to a 2024 correspondence from former Representative Mike Gallagher to Musk, as reported by Forbes. SpaceX rejected these allegations in a social media post.
Reuters was unable to verify whether SpaceX has subsequently restored Starlink services for U.S. military personnel in Taiwan. Both the Pentagon and SpaceX remained silent on Taiwan-related questions.
“As a matter of operational security, we do not comment on or discuss plans, operations capabilities or effects,” a Pentagon spokesperson stated.
SpaceX’s Starlink broadband service has become fundamental to Pentagon drone operations, enabling connectivity for small unmanned maritime vessels resembling high-speed boats without passenger seating. These include models manufactured by Maryland-based BlackSea and Austin, Texas-based Saronic.
During Navy testing in California in April 2025 involving unmanned boats and aerial drones, military personnel documented Starlink’s inability to maintain stable network connectivity due to excessive data demands from operating multiple systems simultaneously, according to a Navy safety assessment reviewed by Reuters.
“Starlink reliance exposed limitations under multiple-vehicle load,” the assessment noted. The document also identified problems with radio equipment from Silvus and networking systems from Viasat.
In the weeks before August’s global Starlink failure, another round of Navy trials experienced disruptions from sporadic connectivity problems with the Starlink network, according to Navy documentation reviewed by Reuters. The specific reasons for these network failures remained unclear.
Despite these technical challenges, the advantages of Starlink’s affordable and readily available commercial service outweigh the risks of potential outages affecting future military missions, according to Bryan Clark, an autonomous warfare specialist at the Hudson Institute. “You accept those vulnerabilities because of the benefits you get from the ubiquity it provides,” he explained.
