Dry and Pocket Compasses

Invented in the year 1300 in Europe, the dry compass is the simplest and cheapest of the other compasses that we find in the current market.

Its use is for bearing markings. Measurements should ideally be made without running as the needle will oscillate until it stops when it has found magnetic north.
Pocket compasses are considered to be those that generally occupy the spherical part of the compass and can have a cover or an accessory such as a ring or carabiner to carry it hanging. Their weight is low and they can be both dry and liquid, that is, filled with a liquid substance that makes them more stable than dry ones.