The cost of an Xbox 360 controller is significantly less than the joystick previously used to control the submarine periscope. (Lockheed Martin Photo) OK, so my 10-year-old kid could board an advanced U.S. Navy submarine and operate the periscope? That seems to be the pretty cool assumption based on the fact that sailors are now using Xbox 360 controllers to perform functions aboard some vessels. The Virginian-Pilot newspaper reported that the Microsoft game-console controllers have replaced the helicopter-style stick used to control the periscope on Virginia-class submarines. The periscope itself is not the rotating tube most people think of thanks...