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Back in the 1930s the rigid airships plying the Atlantic used 'pressure ridge' techniques.

During the flight the navigator would use the later weather reports to plot a course that would follow the ridges between high- and low-pressure regions, either to find a corridor of minimal wind or to ride a favorable wind like a slingshot. Without that, they couldn't hope to reach the other side if they hit a headwind.

I wish I could remember more but the only reference I've found to it is in an old library copy of 'Giants in the Sky' by Douglas Robinson.



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