United States Navy

Summary

The United States Navy conducted a test of unmanned surface vessels that relied on Starlink for communications when a global outage of the satellite network cut off contact, leaving the autonomous boats adrift off the California coast and halting operations for nearly an hour. The disruption revealed a single point of failure in its drone program and added to earlier reports of intermittent Starlink connectivity issues during similar exercises, underscoring concerns about the military’s growing dependence on a single commercial provider for critical communications.

Motives

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TTPs

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Description

Last August, U.S. Navy officials conducting a test of unmanned vessels identified a single point of failure in their reliance on Starlink when a global outage across Elon Musk’s satellite network affected millions of users and left two dozen unmanned surface vessels drifting off the California coast, disrupting communications and halting operations for nearly an hour. The test involved drones intended to support U.S. military options in a potential conflict with China, and the incident was one of several Navy test disruptions linked to SpaceX’s Starlink that prevented operators from connecting with autonomous boats, according to internal Navy documents reviewed by Reuters and a person familiar with the matter. The outage underscored the vulnerability of depending on a single commercial satellite constellation for critical naval communications during exercises. No immediate alternative communication method was described in the source material, and the Navy did not publicly detail any contingency measures taken during the hour‑long interruption. The Pentagon did not respond to inquiries about the specific drone test or its broader collaboration with SpaceX on the incident.

In April 2025, during a separate series of Navy tests in California that included unmanned boats and flying drones, officials reported that Starlink struggled to maintain a solid network connection because of the high data volume required to control multiple systems, as noted in a Navy safety report examined by Reuters. The report explicitly stated that “Starlink reliance exposed limitations under multiple‑vehicle load” and also cited problems with radios supplied by Silvus and a network system provided by Viasat. In the weeks preceding the August outage, another set of Navy tests experienced intermittent connection issues with the Starlink network, according to Navy documents reviewed by Reuters, although the precise causes of those network losses were not immediately identified. These earlier difficulties indicated recurring challenges with Starlink performance under the operational demands of the Navy’s autonomous vessel programs. The Navy and SpaceX did not provide comments when approached for clarification on any of these test disruptions.

The Pentagon’s chief information officer, Kirsten Davies, stated that the Department leverages multiple, robust, resilient systems for its broad network, reflecting an official acknowledgment of efforts to diversify communications dependencies. Democratic lawmakers have publicly warned the Pentagon about the risks of relying on a single company led by the world’s richest man to deliver essential national security capabilities. Reuters reported that Musk had previously disabled Starlink access for Ukrainian troops attempting to retake territory from Russia, an action that affected allied confidence in the service. In Taiwan, SpaceX faced criticism over allegations it was withholding satellite communications from U.S. service members stationed there, citing a 2024 letter from then‑Representative Mike Gallagher to Musk that suggested a possible breach of contractual obligations; SpaceX disputed the claim on X, and Reuters could not confirm whether Starlink service had since been restored for those personnel, while both the Pentagon and SpaceX declined to comment on the Taiwan issue. An official noted, as a matter of operational security, that the Department does not comment on or discuss plans, operations capabilities, or effects. Starlink broadband has been described as crucial to the Pentagon’s drone program, providing connectivity to small unmanned maritime vessels resembling speedboats without seats, including models manufactured by Maryland‑based BlackSea and Austin, Texas‑based Saronic.

Sources

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