Dense fog once again hit the operations at the IGI Airport in Delhi on Wednesday, delaying the schedule of over 40 domestic and international flights and causing inconvenience to fliers.
The runway visibility was good at night and operations were smooth but it started to deteriorate after 6:30am and take-offs were suspended as runway visibility dropped to less than 125 metres, the required minimum for the low visibility take off (LVTO), an airport official said.
Planes arriving at Delhi airport were able to land usingthe CAT-III B instrument landing system (ILS), but it was also stopped as the visibility at the one end of the runway went below 50 metres at around 7.30am, the official said.
Since the take-offs were suspended since 6.30am, flights scheduled to depart after that have been put on hold due to which schedule of around 40 domestic and international flights has been delayed.
Also, around eight flights were cancelled or not operating out of Delhi to some destinations either due to operational reasons or poor weather conditions at the destinations, airport sources said.
The Delhi airport is equipped with CAT-III B ILS on two runways, which helps a CAT-III B compliant plane to land when the runway visibility is up to 50 metres.
Airport officials said, there might be a few diversions of flights on Wednesday.
Meanwhile, dozens of trains were also delayed due to the dense fog, while many were rescheduled.
On Monday, Delhi airport witnessed the winter's first fog and flight operations were halted for over two hours, leading to delays and diversions of around 140 flights.
Dense fog continued to engulf IGI airport for the second day on Tuesday and a total of 19 domestic and international flights were cancelled, seven diverted and rest were delayed by over three to four hours.