Field Techniques Brunton Pocket Transit Collecting data in the field, especially spatial data in the form of maps, cannot always be done without knowing direction. One of the most basic tools for determining direction is, of course, the compass. Note that the name implies that it is far more than a compass, but a sophisticated scientific instrument. There are two types of Brunton's, azimuthal and quadrant.
Direction is designated first in reference to North or South, then to East or West.
Personal preference usually dictates which type of Brunton field workers use. The first thing that needs to be said about Brunton's is that they are both rugged and delicate. On one hand, they are durable and can tolerate hard use. But, on the other hand, the parts cannot tolerate mistreatment. Special care must be taken when closing.