... can also be used to determine dip angle, azimuth angle, tool face angle and depth of borehole accurately. 2 It is ... can be widely used in engineering, hydrology, coal field, oil field, and geology. 3 The instrument is composed of laptop (optional), controlling case and ... angle is at 3~50°, measurement accuracy is ±4°;(3) Tool face angle: 0~360°; measurement accuracy is ±4°;3. Measurement ...