valmidusaste, mille rakendamise korral peab õhusõiduk kiiresti õhku tõusma, et tuvastada ja tabada tundmatu õhusõiduk või luua side ühenduse kaotanud õhusõidukiga
A higher state of readiness in which aircraft will become airborne within minutes to intercept and identify unknown aircraft or intercept one that has lost contact with air traffic control.
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