Jisho

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Noun
1. territorial airspace
Wikipedia definition
2. AirspaceAirspace means the portion of the atmosphere controlled by a country above its territory, including its territorial waters or, more generally, any specific three-dimensional portion of the atmosphere. Controlled airspace exists where it is deemed necessary that air traffic control has some form of positive executive control over aircraft flying in that airspace (however, Air traffic control does not necessarily control traffic operating under visual flight rules within this airspace).
Read “Airspace” on English Wikipedia
Read “領空” on Japanese Wikipedia
Read “Airspace” on DBpedia

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