The dual-axis hollow hinge facilitates quick and accurate measurements without requiring multiple readouts or tools. Only one measurement configuration is required for strike and dip, trend and plunge, as well as bearing and vertical angle. North runs parallel to the main hinge axis, making this compass the only Brunton Transit capable of measuring strike and dip simultaneously. There's a lid protractor and rotation around the minor axis for accurate measurements of trend and plunge across any surface, even on overhangs. Adjustable declination allows for use across North America without sacrificing accuracy. Available in either azimuth or quadrant.