Late last August, just 50 miles south of Washington, D.C., a series of explosions rocked the normally placid Potomac River. The blasts came from artillery belonging to the USS Dahlgren, which was testing a new targeting system. Using a drone to observe its marks, the targeting system automatically recalculated its aim and retrained the Dahlgren’s gunners. The following volley hit, clearly demonstrating the value of the targeting system. But perhaps more impressive was the USS Dahlgren itself, which, despite its name, isn’t a ship.