So if both MB and LTV are CAVCOCK but there is cloud at 5100 all the way enroute how are you going to navigate and keep it legal? If you're IFR then what does a bit of cloud above 5000 matter anyway and finally, if you are CAVCOCKED and cruising at 6500 you would want to be starting your descent well beyond the CAVOK range of 5nm(?) so knowing about CAVCOCK is of what benfit again?
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