Airlines in Nigeria have been unable to operate nationwide due low visibility and lack of modern equipment as Harmattan haze takes over the skies.
There are several cancellations of flights since December 25 as airlines were unable to take off or land in many areas in the country.
The situation, which could have been averted with at least Category 2 Instrument Landing System, has caused passengers disappointment, and loss of huge revenues to the nation and the airlines.
Reports say Azman, Aero, Arik, Air Peace, Dana, Medview have all been forced to cancel flights, while no airline has taken off since 9am on Tuesday.
Daily Nigerian gathered that with a Category 1 operation, the obsolete system which Nigeria uses, at least 800 metre visibility level is required for landing.
It was gathered that most advanced countries have reached up to Category 3c, a system that allows take off and landing at even zero visibility.
Findings show that at Malam Aminu Kano International Airport, the visibility level dropped to 500 metres on Tuesday, while at Sam Mbakwe Airport, the visibility level was less than 300 metres.
At the Port Harcourt Airport, it was also less than 800 metres.
Investigation also shows that Abuja and Lagos airports bore similar situation on Tuesday.