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An aircraft is climbing from an airport at Mean Sea Level to an altitude of 21 000 ft.
Determine the wind vector which should be used to plan the climb, given:
The reported surface wind is 030 /15 kt and it is in ISA conditions.
The upper winds are:
FL 050: 050°/25 kt
FL 100: 070°/30 kt
FL 180: 090°/40 kt
FL 240: 110°/50 kt