Read the paragraphs above the one I quoted. Like this: > “The biggest advancement is our buoyancy management system that allows the vehicle to operate autonomo

Read the paragraphs above the one I quoted. Like this: > “The biggest advancement is our buoyancy management system that allows the vehicle to operate autonomously - without the hundreds of people that you saw grabbing the Zeppelin type airships” or this: > The system gets around a major drawback of traditional airships [...where] ropes and docking stations are needed on the ground to stop a vessel floating off.