Title: Interpret readings on an aircraft course and DME indicator.
Course: Aircraft Pilot Training II (20053-II) > Section: Operating the Aircraft

Interpretation should include the following:

- The course deviation indicator (CDI) is found in most training aircraft.
- It consists of an omnibearing selector (OBS), sometimes referred to as the course selector, a CDI needle (left-right needle), and a TO/ FROM indicator.
- The course selector is an azimuth dial that can be rotated to select a desired radial or to determine the radial over which the aircraft is flying.

PLT087