Instruments
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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