teenistus, kes jälgib kindlaksmääratud vastutusalas lennutegevust mõjutavaid ilmastikutingimusi ning annab üksikasjalikku teavet marsruudil esinevate või oodatavate ilmanähtuste kohta, looduslike või , an office designated to provide information concerning the occurrence or expected occurrence of specified en-route weather and other phenomena in the atmosphere that may affect the safety of aircraft , an office monitoring meteorological conditions affecting flight operations and providing information concerning the occurrence or expected occurrence of specified en-route weather phenomena, natural a