Crisis in our airspace is real

The "Swiss cheese" model of accident causes suggests that different human and natural factors are like slices of cheese lined up, with random holes. Each slice, or layer of defence, mitigates things going wrong... until all the holes, or negatives, line up. When that happens, especially in aviation, aircraft crash and people can die.

- 

At the moment, many pilots and administrators in the South African aviation sector are gravely worried that it might only be a matter of time before the holes in our Swiss cheese line up and we have a major air crash. The crisis in our airspace is real, the words of assurance from the Air Traffic and Navigating Systems (ATNS) organisation notwithstanding.