Runways in Greenland aren't numbered. The North Magnetic Pole wanders across northern Greenland sometimes, and the magnetic variation can vary from day to day. I spent an enjoyable summer in Greenland installing a microwave link, and you don't align the dishes with a compass, you use a sextant. In the summer, the sun is always above the horizon north of the Arctic Circle, and even through cloud you can take a bearing. When you go further north, e.g., Cape Morris Jesup, the compass needle points south or west.