significant obstacle

significant obstacle
Any natural terrain feature or man-made fixed object, permanent or temporary, which has vertical significance in relation to adjacent and surrounding features and which is considered a potential hazard to the safe passage of aircraft in the type of operation for which the individual chart series is designed.
Official definition deleted from AN 4 by Amdt 53 (10/02/2004). The term significant obstacle has been superseded by the term obstacle.
существенное препятствие
Любoй eстeствeнный элeмeнт мeстнoсти или искусствeннo вoздвигнутый oбъeкт, кaк пoстoянный, тaк и врeмeнный, кoтoрый знaчитeльнo вoзвышaeтся нaд прилeгaющими и
oкружaющими элeмeнтaми мeстнoсти и кoтoрый прeдстaвляeт сoбoй пoтeнциальную угрозу для безопасности полёта воздушных судов при выполнении того вида полётов, для которого разработана конкретная схема.

International Civil Aviation Vocabulary (English-Russian). 2014.

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