I don't have my instrument plates to hand, so I can't quote an exact example, but from one plate to another, the radial of a specific point from a VOR can vary by a couple of degrees, even on plates published by the same publisher, for airports in the same country, with the same date.
For example, if you look at a selection of Aerad plates for airports like Southampton, Alderney and Guernsey, as well as comparing these to the Aerad airways chart covering the same area, and find the radial from SAM to ORTAC, I think you will find that it can be either 206, 207 or 208 degrees.
Unless you have a glass cockpit, I wouldn't worry because you can't set the OBS or CDI that accurately! If you do have glass, though, then you're bu**ered!
FFF
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