Boston's Sea Machines Robotics has raised another $10m to develop autonomous shipping systems.
The company said it had tapped Accomplice, Eniac Ventures and Toyota AI Ventures among others to invest in its stock.
Brunswick Corp, through investment partner TechNexus Venture Collaborative, NextGen VP, Geekdom Fund, LaunchCapital and LDV Capital were also involved.
It brings the total amount raised to $12.5m.
