Drones

The 7-11 For Robot Subs: Underwater Plug And Stay Hubs

Think it’s hard to find a place to charge your smartphone at the airport? Try finding a power outlet in the ocean. Imagine you’re a robotic Navy mini-sub whose batteries are running low after a long mission monitoring, say, traffic around Chinese artificial islands in the South Pacific. Currently, you’d have to recharge at a land base or a surface ship. The former keeps you close to friendly shores while the latter gives away your presence.