9-1. TYPES OF COMPASSES
The lensatic compass is the most common and simplest instrument for measuring direction. It is discussed in detail in paragraph 9-2. The artillery M2 compass is a special-purpose instrument designed for accuracy; it will be discussed in Appendix G. The wrist/pocket compass is a small magnetic compass that can be attached to a wristwatch band. It contains a north-seeking arrow and a dial in degrees. A protractor can be used to determine azimuths when a compass is not available. However, it should be noted that when using the protractor on a map, only grid azimuths are obtained.