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Six tigersharks and 14 ghosts took to the sky above Yuma, Arizona. The tigers were drones specially outfitted as part of DARPA鈥檚 program CODE, or 鈥淐ollaborative Operations in Denied Environment,鈥� and the ghosts were virtual doubles of the tigersharks, following along with the tiger drones in simulation. The exercise was the capstone in a program designed to teach drones how to work together in the absence of modern communications infrastructure.

is, as the full name suggests, about operating in those denied environments, regardless of how they are denied. DARPA started this program , and has been ramping up the program for a conclusion in . The end product is a bundle of, well, code that is government-owned and -designed airframe-agnostic, so that the Navy and Air Force can adapt it as they see fit to their existing platforms.

This isn鈥檛 the first time the Pentagon鈥檚 had to design drones without the aid of satellite infrastructure. Recently published documents from the National Reconnaissance Office鈥檚 show the challenges of making drones work without direct control. Virtually all aspects of the technology have improved since then, but it鈥檚 still informative for how a drone was supposed to operate on its own in hostile territory. CODE takes advantage of modern systems, and also has the drones rely on each other for communication relays, input and navigation when cut off from external communications and navigational aids.

The end result is a new sort of software infrastructure, a tool to iterate and improve upon that lets drones work together to meet mission goals without the need for a dedicated human pilot to remotely control each vehicle. Autonomy is designed and sold primarily as a way to overcome jamming and continue operations in denied environments, but it鈥檚 also a labor saving (or labor-amplifying) tool. Mostly autonomous swarms mean dozens of vehicles can be overseen by the same crew it once took to pilot a single craft, and that has huge implications for filling the skies of future wars.