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[–] 1 point 10 months ago

Hmmm. I see one problem with this. The cost estimate is very pie in the sky. If all air transport does this then that is going to lead to massive delays. Having a kilometer thick chunk of airspace unusable is cutting out 4 usable altitudes. Those planes now crowd already crowded airspace above and below. Not saying it shouldn't be tried but we should be more realistic about the cost.

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