If you want a vision of what naval battles could look like in the near future, you just got it. DARPA has tested a parasailing radar array (part of its Towed Airborne Lift of Naval Systems project, or TALONS) using its robotic ACTUV boat as a nest. The array flew up to 1,000 feet, where its sensors were far more effective than they'd be at ship level. Its surface tracking radar had six times the range, and even a handheld radio covered three times its usual distance. The combination could lead to unmanned warships that not only travel for months on end, but can easily detect potential threats before they're in firing range.