9.2 Blog Discussion: Weather Hazards

 Fog is one of the most significant hazards to safe aviation operations. Fog is classified as ground-lying cloud producing a visibility of ⅝ sm or less and is denoted at ‘FG’ on METAR reports (Transport Canada, 2022). Fog limits visibility on the ground creating numerous risks associated with a lack of visibility. Additionally, fog can create problems on the approach with pilots not being able to make visual contact with the runway. Taxiing and other ground movements are also susceptible to increased risk during low visibility operations. This creates an incredibly complicated and stressful environment for all parties involved. Safety margins have to be increased which can lead to delays, diversions and other frustrations.

One instance where fog had deadly consequences in the Tenerife airport accident, which was the deadliest crash in aviation history. Two 747’s collided while one was crossing the runway, and the other was on the takeoff run. The two aircraft could not see each other until it was too late. Since the accident, technology has improved making it easier for Air Traffic Control to identify potential situations like this when their visibility is limited. 

References: 

Transport Canada. (2022, March 24). Aeronautical Information Manual - tc.canada.ca. Retrieved April 7, 2022, from https://tc.canada.ca/sites/default/files/2022-03/aim-2022-1_met-e.pdf