Geological compasses

Good night steemit friends. Hope you guys are healthy tonight.
Compass is an accurate navigational tool for accurately matching the earth's magnetic.
=>. Usefulness

Geological compasses have many uses, among them are used to measure the position of an element of geological structure, measure the strike / dip of the slope of the rock layer, and of course as a pointer.
=>. How to use

From several sources, how to use the geological compass seen from the main parts of the compass. Among them:
Compass Needle
The compass needle always points toward the magnetic north pole of the earth. Therefore there is a deviation with the north pole of geography commonly called declination. Declination usually has a different magnitude in every place. In order for the compass to match the north pole of geography, the "graduated circle" must be rotated.
Dividend Sharing Circle
There are 2 types of degrees in this compass,
The azimuth compass with the division of degrees from 0 degrees in the north up to 360 degrees counter-clockwise.
Kompas kwardan has a division of degrees from 0 degrees to the north and south, then 90 degrees to the east and west
Clinometer
Compass part that serves to measure the slope of a slope. lies at the base of the compass and is usually equipped with horizontal and scale gauge bubbles.
Regard @abumuhammad