50-Knot Sentry Drone Is the Ultimate in RC Boats

Just eleven and a half feet in length, the Sentry is an unmanned surveillance craft from British defense firm Qinetiq that can hit speeds of 50 knots. The boat, which can work up to 16 miles from its controller, and go for up to six hours, is on show at an arms fair in London this week, and has all sorts of tricks up… » 9/13/07 7:30am 9/13/07 7:30am