Just last year, there were four robots called the Wave Gliders cast off to cross the Pacific Ocean en route to certain destinations. One pair was set for Japan while another pair were headed for Australia. And now it seems that of the four robots, one successfully made it to Australia which set a new record of sorts.
Papa Mau successfully got to Australia, travelling a record 9,000 miles despite varied conditions that included storms of the worst kind. The robots were built to withstand them of course. The robots were built to survive the perils of the ocean and also to measure oil spills and salinity levels.
Two robots were unsuccessful due to rudder problems while the third one had targeting issues and is still out at sea.