Allied Underwater Drones Link Across Three Nations
A trilateral trial shows Australia, Japan and US systems can exchange commands, a step toward interoperable unmanned maritime operations.
Updated on Nov. 3, 2026 in Robotics
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Australia, Japan, and the United States connected autonomous maritime systems through a single underwater communications network during a trilateral experiment at Exercise Keen Sword 27 in Japan. The experiment demonstrated two-way communication between the three nations' systems; it is a demonstrated trial rather than a fielded capability.
Why it matters
The experiment builds on several years of growing trilateral maritime cooperation and shows allied unmanned underwater vehicles can exchange position data and commands across national systems. It points toward interoperable networks for unmanned maritime operations.
The demonstration linked a Japanese REMUS 620 unmanned underwater vehicle to Australia's Rock Lobster underwater communication node, a US gateway, and a US ground station. No latency, range, or bandwidth figures were disclosed, so the demonstrated capability is confirmed two-way connectivity rather than measured performance.
The players
Australia
Australia contributed key elements to the design and delivery of the experiment and hosted the Rock Lobster underwater communication node.
Japan
Japan hosted Exercise Keen Sword 27 and supplied the REMUS 620 unmanned underwater vehicle used in the demonstration.
United States
The United States provided the gateway and ground station that completed the network chain in the experiment.
The details
Position data from the REMUS 620 vehicle was passed through a chain of relay points: first Australia's Rock Lobster node, which is an underwater communication node, then a US gateway, then a US ground station. A command signal traveled back along the same chain to the vehicle, completing a two-way loop across three countries' equipment. The REMUS 620 is an unmanned underwater vehicle, a self-propelled robotic submarine that operates without a crew on board.
Timeline
Exercise Keen Sword 27 took place in Japan; the source does not give exact dates for the experiment.
The source article was published November 3, 2026.
The Tech Race
The trilateral link extends allied exercise activity held in Japan into networked unmanned maritime systems. It adds a three-nation command-and-data path to the autonomous underwater vehicle programs being developed by these governments.
The experiment is a military demonstration, so no civilian products or availability dates were announced. Its practical effect is on allied maritime operations, where interoperable unmanned underwater systems would let partner nations share sensing and control.
The takeaway
Watch for follow-on trilateral trials that publish latency, range, or bandwidth figures for the Rock Lobster relay chain. Those numbers would show whether the demonstrated two-way link can support operational unmanned maritime missions.
Further reading
For more on the machines driving this work, see the Robotics section.
Source note: This article includes information reported by GlobalSecurity.
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