ORIGINAL: KodiakArcher
If you get a protractor and put the zero (flat) edge down the centerline of the shaft starting at the tail of the fletch and then read the angle at the front of the fletch you get the degrees of offset. (The degrees that the fletch is offset from the straight centerline of the arrow.)
Not a bad idea at all. I was just always wondering why people were always throwing these 2-3 degree numbers around without knowing that that distance actually was (therefore really knowing whether or not it was truly 2 degrees, 3 degrees, etc.