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Obscuring phenomenon(Also called obscuration.) Any collection of particles, aloft or in contact with the earth's surface, dense enough to be discernible to the observer. Examples are haze, dust, smoke, fog or ice fo [..]
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Obscuring phenomenonAn atmospheric phenomenon, other than clouds, which obscures a portion of the sky from the point of observation. Also called obscuration.
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Obscuring phenomenonAnything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel or aircraft. The term is usually used to refer to an isolated danger to navigation, suc [..]
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