a designated area within a flight information region where air traffic advisory service is available
a specifically defined airspace for which air defence must be planned and provided, piiritletud õhuruum, milles planeeritakse ja tagatakse õhukaitse
ADA . Lennunduse terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://127.0.0.1:5577/search/unif//len/ADA/1/est (09.10.2026)