Course Deviation Indicator(CDI)

Definition

A needle showing lateral displacement from the desired course, whether VOR radial, localizer, or GPS track. Full-scale deflection represents different distances depending on the navigation source.

Related Terms

Horizontal Situation Indicator(HSI)

A navigation instrument combining a heading indicator with VOR/ILS course deviat...

VHF Omnidirectional Range(VOR)

A ground-based radio navigation aid transmitting radials in all directions. Pilo...

Localizer(LOC)

The lateral guidance component of an ILS providing precise runway centerline ali...

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