Drones are already patrolling the skies, and eventually Rolls-Royce wants to see them take over the seas too. According to Bloomberg, Rolls-Royce Holdings is developing unmanned cargo ships that can be remotely controlled by captains using a virtual-reality recreation of a vessels bridge. Now the technology is at the level where we can make this happen, and society is moving in this direction, Oskar Levander, a marine engineering and technology executive at Rolls-Royce, tells Bloomberg. While now may be Rolls-Royces time to start moving, its far from the time when these ships will set sail. As Bloomberg points out, there are quite a few regulatory and financial hurdles in the way of unmanned vessels, including international minimum crew requirements and an ineligibility for being insured by major providers.