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BearingList is an optional list of bearings for the alert. The alert will be triggered only while traveling along the specified bearings.
Angle is the angle of the bearing. North corresponds to 0 degrees, east corresponds to 90 degrees, and so on.
Width specifies a +/- range for the bearing. For example, if the angle is 55 degrees and the width is 15 degrees, the alert can be triggered while travelling at any bearing between 40-70 degrees. This element is optional; a width of 25 is used by default.
BiDir specifies whether the bearing applies in the opposite direction (180 degrees). This element is optional; this is false by default.