The Benthic Rover is a fully autonomous underwater vehicle that collects data for the Pelagic-Benthic Coupling Lab’s studies of seafloor carbon consumption. Capable of yearlong deployments, it is the only untethered underwater rover in the world operating at abyssal depths. The Rover has transited over 11 kilometers of abyssal seafloor at 4,000 meters depth since it was first deployed at Station M in 2011. Using acoustic communications, we recalled the Rover to the surface on October 17. Forty-eight hours later, engineers had the Benthic Rover ready to re-deploy for another year.