Using a robotic balloon lift, you could have a heavy-lift seaport crane in place in a matter of hours just about anywhere. It could be used in places where shipping tends to bottleneck--like at the Panama Canal--without creating anymore costly permanent infrastructure. And, at an estimated $7-10 million for a robo-balloon-crane big enough to lift shipping containers from ship to shore and back, a working Tethered Air crane or something like it might just be a steal of a deal. That's dirt cheap next to the cost of building an actual seaport, and for coastal cities that otherwise could never even dream about building a deep water port facility, it could quickly pay for itself. Much more at LiveScience.