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Features October 2012 Issue

Mag Course mismatches

How many direct magnetic courses can there be between two points? Sometimes the answer is three. How many can possibly be right? Actually, all of them.

I looked at the arrivals into Chicago O’Hare and noticed something peculiar. Both the BENKY ONE and BRADFORD FIVE arrivals have a transition route from Kirksville VOR (IRK) to LOAMY intersection. But the BENKY arrival shows a course of 068 degrees while the BRADFORD arrival shows 059. I put IRK direct to LOAMY in my GPS ... and got a third course of 064.

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