How come the published radials for way points differ to what you would read off the map. For example in the Pooleys guide EGAE is given as "BEL 117.2 314 39" which I interpret as saying that EGAE is 314 degrees magnetic from the Belfast VOR with a distance of 39miles. Yet if you were to plot that line on the map you would get 311 magnetic.
This isn't just in Pooleys, if you look at waypoints on the CAA approach charts you'll find that there is a difference of a few degrees as well.
Any ideas as to what I'm missing here
mmcc