New Delhi, Dec. 19 -- Dense fog in the early morning hours across Delhi and parts of northern India continued to affect visibility on Friday, disrupting flight operations at the Indira Gandhi International Airport.

Delhi International Airport said operations are currently being conducted under CAT III conditions due to low visibility.

CAT III is a category of Instrument Landing System (ILS) that offers lower minimums for visibility and decision height. CAT III allows for almost zero visibility landings in some cases. Advanced equipment and pilot training are required for CAT III approaches.

"Dense fog is impacting flight schedules, and operations are currently under CAT III conditions. Our on-ground teams are working in close coordinat...