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SeventyPlus Home About us Contact us Welcome to our site God and The Zodiac Recently I read an article about a runway at Tampa International Airport being closed for repainting of the compass heading for that runway. For those who are not aware of it, runway numbers coincide with the magnetic heading of the runway and the earth has tilted on its axis enough to require the change. If the change in heading exceeds 3 degrees it must be changed. More recently it was