Oftentimes when people start gushing about how amazing I must be to sail to Hawaii, I tell them that if you threw a coconut in the water in Berkeley, it would eventually make it to Hawaii. There are currents and tradewinds and all sorts of factors that make getting the boat there (eventually) not the most difficult proposition.
The Atlantic has the same situation. Something called the Atlantic Circle. It combines a few oceanic currents, a few tradewinds and a big billowing high pressure zone smack in the middle. You go up the coast of America, across, down the coast of Europe and across. Easy peasy.
But, still, robots doing it? Of course. The Microtransat is a race of robot-boats from Portugal to the Caribbean (officially: between 10 degrees and 25 degrees North and 60 degrees West). Here's what they say about the race: "The Microtransat Challenge is a transatlantic race of fully autonomous sailing boats."
Fully autonomous sailing boats? That's code for our new sailing masters. Pirate robot sailboats patrolling the High Seas? Robot race committees enforcing every 720 you deserve? I, for one, welcome our Robotic Sailing Overlords.