Deviant Behavior

Its been said that experience is what you get when you dont get what you wanted to get. Well, taking significant liberties, a pilot might then say that a deviation is where you go when you dont get to go where you planned to go. Got it? We pilots are typically a robust and determined bunch. We dont like to admit we cant travel our planned route. Once were on our way and it looks like Mother Nature doesnt want us on our planned route, the common technique is to simply go have a look before deciding on a different, longer route. To understand the fallacy in this, lets cover a little basic geometry to see that its better to deviate early for the shortest practical addition to your route while maintaining your sanity and keeping your blood pressure in check with a conservative deviation.

Friday, August 22, 2008 at 12:00 AM ET

Verified

Dr. Carlo Scalo and and a team at Purdue University developed a way to use supercomputers to efficiently simulate vortex flow phenomena inherent to wake turbulence encounters. Purdue University/Rebecca McElhoe

Key Takeaways:

Pilots should deviate early when encountering weather to save distance, conserve fuel, and reduce stress, as waiting and reacting closer to the weather often results in a longer, more anxious flight.
Deviations can occur in four dimensions: lateral (left/right), vertical (climbing/descending), and temporal (waiting for weather to move).
Effective deviation planning requires a comprehensive understanding of the weather's movement, development, and the impact of wind, using real-time data for the "big picture."
While IFR pilots must coordinate deviations with ATC, they should prioritize safety and be prepared to firmly request sufficient clearance, especially in challenging airspace or severe weather.

See a mistake? Contact us.

We pilots are typically a robust and determined bunch. We dont like to admit we cant travel our planned route. Once were on our way and it looks like Mother Nature doesnt want us on our planned route, the common technique is to simply go have a look before deciding on a different, longer route. To understand the fallacy in this, lets cover a little basic geometry to see that its better to deviate early for the shortest practical addition to your route while maintaining your sanity and keeping your blood pressure in check with a conservative deviation.

Geometry Lesson

Imagine youre on a 400-mile leg from A to B. At 200 miles there is a developing line of thunderstorms. Undaunted, you press on to “take a look.” After about 150 miles, 50 miles from those cells, Nexrad still shows a 100-mile line bisected by your course. You deviate 50 miles to the left as you nervously compute your new