A unit of angular measurement equal to one-360th part of the circumference of a circle. The entire globe contains 360 degrees, each degree contains 60 minutes, and each minute contains 60 seconds.

The difference in degrees between true north and magnetic north.

A line on a map or chart indicating elevation in feet, and connects all points of the same height above sea level.

An instrument used for showing direction, consisting of a magnetic needle swinging freely on a pivot and pointing to magnetic north.

An imaginary line on the ground running east-west (horizontal) measured with special accuracy to provide a base for surveying.

A back bearing is measured from the object to your position. It is the exact opposite of a direct bearing.

Three to four alpha-numeric characters specific to a unit existing within the agency’s official organizational structure. The organizational unit code identifies the unit within the interagency incident management community in a common manner.

The responsibility of an organization related to wildland fire.

The type of organizational unit within the interagency incident management community represented by the Unit ID.

The full name of the organization found on official documents or web sites.