Aaround 150 flights, either arriving here or departing from here have been cancelled or diverted due to extremely poor visibility at the airport due to dense fog, airport officials said.
The national capital has been witnessing thick fog since Jan.5. Dense fog started to descend at the airport around 7 pm last evening. Within two hours, the runway visibility dropped from 500 metres to less than 100 metres.
Operations almost came to a complete halt around 10 pm after runway visibility dipped to less than 75 metres, which is the minimum required visibility condition for an aircraft to land using CAT IIIB instrument landing system. The general visibility was almost nil. Delhi airport is equipped with two CAT—III B complaint runways, which enables a CAT—III B trained pilot to land a CAT—III B complaint plane when the runway visibility is merely 75 metres. On Jan.5, the visibility remained poor during the whole day which led to delay in schedule of around 206 domestic and international flights. Delhi had been witnessing dense fog from Jan.4, which, according to the Met Department, is the “season’s worst.” Met officials said it may be the worst fog after January 2010.