LEARJET 35 COCKPIT INSTRUMENTS
Course Deviation Indicator (CDI)
The Course Deviation Indicator (CDI) is an avionics instruments used in aircrafts navigation systems to determine the aircrafts lateral position in relation to the course direction. This is an important type of instrument for navigation use as it shows you the direction you are going which has been set by the pilots and prevents you from going off course.
The CDI consists of an
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Omnibearing Selector (OBS)
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CDI Needle (Left-Right Needle)
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TO/FROM indicator
How It Works
The OBS Selector is rotated to select a desired radial over which the aircraft is flying. The needle will indicate the position radial relative to the aircraft. When the deviation needle is centered the magnetic course “FROM” or “TO” the station is determined. When the flag displays “TO”, this means the course must be flown to the station and if the flag displays “FROM” which means it has flown away from the station.