Say goodbye to the captains, as the near future is bringing "Drone Ships". According to the science and technology tab of msn.com ships carry 90 percent of the world's trade. They also carry people—captains and crew who require food, water, sleep, electricity, and sewage systems to live comfortably aboard a floating vessel. This brings the cost to more than $3,000 a day, which makes up roughly 44 percent of the total operating expenses for a large container ship. The idea of drone ships is being pursued by Rolls-Royce, which has begun its designs for such a machine. It would be 5 percent lighter than a traditional ship before they take cargo. and would burn 12 percent to 15 percent less fuel. These ships could be operating in regions like the Baltic Sea "within a decade." The ships would be operated much like unmanned planes are: via control centers that use virtual-reality simulations of a ship's bridge.