Course Deviation Indicator (CDI) Definition
Course Deviation Indicator (CDI) is a vital navigational instrument that displays the lateral course deviation of an aircraft. It provides accurate information regarding the deviation of the aircraft from the selected course or radial. The needle on the VOR indicator face moves proportionally to the left when the aircraft is flying right of the chosen course and moves to the right when the aircraft is flying left of the selected course.
The CDI is extensively used in aviation as it provides accurate real-time information on the aircraft’s position. It is an essential component of the instrument landing system (ILS) approach and is usually paired with the omnidirectional range (VOR) to provide precise navigation information. The CDI helps pilots to maintain course accuracy, especially when flying in low visibility conditions or when there is no outside reference for flight navigation.
In conclusion, the Course Deviation Indicator (CDI) is a key instrument for pilot navigation, providing important information about lateral course deviation. It is essential for accurate and safe flight, especially during challenging weather or navigational conditions.
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