cbrn:BearingOffsetMeasureType

A data type for a measurement of the angular relationship between an origin and a target point. The first value is the elevation, i.e., the vertical offset angle from the horizontal plane of the ellipsoid. An angle above the horizontal is positive and below the horizontal is negative. The second value is azimuth, i.e.,  the horizontal offset angle. A clockwise offset is positive and counterclockwise is negative. The offset angles are measured from a expected bearing that is defined as the bearing from the origin to where the target is expected to be directly in front of the origin.  The two offset values measure the angular offset from the expected bearing to the actual bearing, where actual is where the target is estimated to actually be.