Why the US Navy operates submarines with Xbox controllers
High-tech Virginia-class submarines used to feature a heavy, $38,000 joystick to control their photonic masts, which are modern periscopes. Finding it clunky and hard to learn, the US Navy replaced it with a standard Xbox 360 controller. The commercial video game controller costs around $30, requires virtually no training for young sailors, and can be swapped out instantly if it breaks.
The Evolution of the Submarine Periscope
For over a century, the submarine periscope was a rigid optical tube that physically penetrated the vessel's pressure hull. Officers had to stand directly beneath the mast, pressing their faces against rotating eyepieces to scan the horizon. While mechanically straightforward, this design forced shipbuilders to place the control room directly below the submarine's sail on the upper deck, severely constraining interior space and introducing a structural weak point where the hull was penetrated.
The Virginia-class attack submarine broke this paradigm by eliminating traditional optical periscopes entirely in favor of photonics masts. These modern electronic masts do not penetrate the hull. Instead, they house high-resolution optical cameras, infrared sensors, and laser rangefinders that capture external data and transmit digital imagery downward through fiber-optic cables. This shift allowed naval architects to relocate the command center to a wider, more protected deck within the submarine, where operators view sensor feeds on large digital workstations.
The Flaws of Bespoke Military Hardware
To direct these sophisticated photonics masts, defense contractors initially developed custom, military-grade control columns. These specialized joysticks and control panels were engineered according to traditional defense procurement standards: heavily reinforced, proprietary, and extremely expensive. A single specialized joystick and control unit assembly cost tens of thousands of dollars to manufacture and install.
Despite their high cost, the custom controllers proved unpopular with the sailors operating them. The heavy, rigid control columns were ergonomically awkward and counterintuitive to use. Operators required hours of specialized training just to manipulate the camera angles and zoom functions effectively. Furthermore, if a proprietary control unit suffered mechanical failure while at sea, replacing it required specialized spare parts that could only be sourced through standard, often slow, defense supply chains.
Adopting the Video Game Controller
During research into human-machine interfaces, engineers and naval personnel tested off-the-shelf commercial alternatives to replace the clunky proprietary hardware. They found that standard consumer video game controllers, specifically the Microsoft Xbox 360 gamepad, offered superior ergonomics and responsiveness for camera manipulation.
Consumer technology companies spend millions of dollars and countless hours refining the ergonomics of video game controllers, ensuring that thumbsticks, triggers, and buttons can be operated effortlessly for hours. When integrated into the Virginia-class mast control systems, the commercial gamepads allowed operators to pan, tilt, and zoom the photonics sensors with precision. Moreover, incoming junior sailors were already intimately familiar with the layout, reducing the training required to operate the mast system to mere minutes.
Clarifying the Controller's Actual Role
Public discussions about the Navy's use of video game hardware often lead to the misconception that sailors steer the entire multi-thousand-ton submarine using an Xbox controller. In reality, the controller's role is strictly limited to the human-machine interface for the imaging and sensor masts.
The propulsion, depth control, and navigational steering of a Virginia-class submarine remain governed by dedicated fly-by-wire ship control systems and specialized helm stations. The game controller merely functions as an input device for the digital imaging suite, translating thumbstick movements into camera pans and button presses into sensor mode toggles. Isolating the gaming hardware to this specific sensor function ensures mission-critical steering systems remain unaffected.
The Power of Off-the-Shelf Procurement
The transition to consumer game controllers highlights a broader philosophical shift in military engineering toward Commercial Off-the-Shelf (COTS) technology. Historically, defense systems relied almost exclusively on custom-engineered components with proprietary architectures. While built for durability, these bespoke parts frequently suffered from rapid obsolescence and ballooning maintenance costs.
By taking advantage of open software architectures and standardized USB connections, naval engineers can integrate inexpensive commercial hardware directly into advanced defense platforms. If an Xbox controller breaks during a deployment, the submarine crew does not need an emergency logistics shipment of specialized components; the broken controller can be swapped out instantly with another standard controller readily available worldwide for a fraction of the original cost.
Key takeaways
•Virginia-class submarines use photonics masts with digital cameras rather than traditional optical periscopes that penetrate the hull.
•The original custom military joysticks were expensive and difficult to operate, prompting the Navy to test commercial game controllers.
•Xbox controllers operate the camera angles, zoom, and sensor modes of the mast, rather than the steering or propulsion of the submarine itself.
•Using commercial off-the-shelf hardware drastically lowers procurement costs, reduces training time, and simplifies replacement logistics.