What instrument is used to determine direction in the field?

• A. A map
• B. A protractor
• C. A compass
• D. A ruler

Answer: (C)

In the field, you need a device that points you toward magnetic north so you can establish a heading and follow a course. The instrument that does this best is the compass. It uses a magnetic needle that aligns with Earth’s magnetic field, and with the orienting features on the housing you can read the direction you’re facing or set a precise bearing on a map.

A map is incredibly useful for planning and identifying terrain, but by itself it won’t tell you which way to go unless you already know which way north is. A protractor measures angles, not real-world direction you’re facing, and a ruler only measures length. So, for determining direction in the field, the compass is the tool made for that purpose.