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obstacle light
DEPRECATED: obstruction light
aeronautical ground light used to indicate the presence of a fixed or mobile hazard to the permitted movement of aircraft on the ground or in the air
Note 1 to entry: The term "obstruction light" is no longer used.
Note 2 to entry: This entry was numbered 845-11-49 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-833 and 17-835 in CIE S 017:2011.