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in the case of NVIS operations, that portion of a visual flight rules (VFR) flight performed at night when a crew member is not using NVG
öönägemissüsteemi kasutamiseta lend . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/%C3%B6%C3%B6n%C3%A4gemiss%C3%BCsteemi%20kasutamiseta%20lend/1/est (04.08.2026)
