With this Geological Compass surface areas and linear measurements in space can be measured in one step. The angle is measured laterally on a vertical circle, and the direction is measured with an integrated Pendel clinometer. Thanks to its robust construction, this structural compass is ideally suited to working in the field. The delivery includes a leather bag with a belt clip, and a special tool to adjust the compass rose and the lid hinge. The circular level, the mirror and the pelorus are also integrated. Oscillation time of the magnetic needle: 30 - 60 seconds.