Here Is Why Airport Runway Numbers Are Changing
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June 15, 2020 - by Jonathan Amos for bbc.com
(expect more airport runway number to change for the modified magnetic heading)
"This is why the North Pole has left its historic position over the Canadian Arctic and crossed over the International Date Line. Northern Russia is winning the 'tug of war', if you like," he told BBC News.
European scientists think they can now describe with confidence what's driving the drift of the North Magnetic Pole.
It's shifted in recent years away from Canada towards Siberia.
Note: Runways are named by a number between 01 and 36, which is generally the magnetic azimuth of the runway's heading in decadegrees. ... A runway numbered 09 points east (90°), runway 18 is south (180°), runway 27 points west (270°) and runway 36 points to the north (360° rather than 0°). Source: https://en.wikipedia.org/wiki/Runway
And this rapid movement has required more frequent updates to navigation systems, including those that operate the mapping functions in smartphones.
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