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Course Deviation Indicator (CDI) is an avionics instrument used in aircraft navigation to determine aircraft position relative to a course or navigation aid. A mechanical VOR display http://virtualskies. ...
Avionics is a portmanteau which literally means aviation electronics. ...
When used with a GPS it shows actual distance left or right of the programmed courseline. GPS redirects here. ...
When used with a VOR or VORTAC the courseline is selected by turning an "OMNI Bearing Selector" or "OBS" knob usually located in the lower left of the instrument. It then shows the number of degrees deviation from the desired course to the Navigational aid (navaid), and is used to intercept and fly TO or FROM any of the 360 compass "radials" that emanate from the navaid. (See Using a VOR for usage during flight.) D-VOR (Doppler VOR) ground station, co-located with DME. VOR, short for VHF Omni-directional Radio Range, is a type of radio navigation system for aircraft. ...
D-VOR (Doppler VOR) ground station, co-located with DME. VOR, short for VHF Omni-directional Radio Range, is a type of radio navigation system for aircraft. ...
D-VOR (Doppler VOR) ground station, co-located with DME. VOR, short for VHF Omni-directional Radio Range, is a type of radio navigation system for aircraft. ...
When used for instrument approaches using a LDA or ILS the OBS knob does not function, since the courseline is usually the runway heading, and is determined by the ground transmitter. Many CDI's also incorporate a second, horizontal, needle. This is used to provide vertical guidance when used with a precision ILS approach, and the decent courseline (usually 3 degrees) is also determined by the transmitter located on the ground. Localizer Type Directional Aid is of a comparable accuracy and use to the Localizer, except that LDA is not aligned with the runway. ...
The Localizer station at Hanover/Langenhagen International Airport in Hanover, Germany. ...
The Localizer station at Hanover/Langenhagen International Airport in Hanover, Germany. ...
A CDI is normally not used with an ADF, which receives information from a normal AM radio station or an NDB. An ADF indicator or Radio Magnetic Indicator (RMI) is used instead, both of which provide direction or heading information. Radio Tower of NKR Leimen-Ochsenbach, Germany A Non-Directional Beacon (NDB) is a radio broadcast station in a known location, used as an aviation or marine navigational aid. ...
Older CDI's were designed to receive a signal from a VOR, LDA or ILS receiver. These receivers outputted a signal composed of two AC voltages. An internal converter converted the signal to drive the needle left or right. These CDI units are not compatible with GPS units. Many modern VOR/LDA/ILS receivers include the converter, and output a differential voltage to drive a "converterless" CDI. The CDI's without a converter are compatible with aviation GPS units.
| Flight instruments | Pitot-static instruments: Altimeter · Airspeed indicator · Machmeter · Vertical speed indicator Six basic instruments in a light twin-engine airplane arranged in the basic-T. From top left: airspeed indicator, attitude indicator, altimeter, turn coordinator, heading indicator, and vertical speed indicator Most aircraft are equipped with a standard set of flight instruments which give the pilot information about the aircrafts...
A pitot-static system is an avionics component which directs ram air pressure and static air pressure lines into the appropriate flight instruments. ...
Diagram showing the face of a three-pointer sensitive aircraft altimeter displaying altitude in feet. ...
Airspeed Indicator in a light aircraft The airspeed indicator or airspeed gauge is an instrument used in an aircraft to display the crafts airspeed, typically in knots, to the pilot. ...
Diagram illustrating the face of a Machmeter A Machmeter shows the ratio of the speed of sound to the true airspeed an aircraft is flying. ...
The term Variometer also refers to a type of tunable electrical transformer // Definition A variometer (also known as a rate-of-climb indicator, a vertical speed indicator (VSI), or a vertical velocity indicator (VVI)) is an instrument in an aircraft used to inform the pilot of the rate of descent...
Gyroscopic instruments Attitude indicator · Heading indicator · Horizontal Situation Indicator · Turn and bank indicator · Turn coordinator Attitude indicator (with integrated localizer and glideslope indicators) Drawing An attitude indicator (AI) or artificial horizon is an instrument used in an aircraft to inform the pilot of the orientation of the airplane relative to the ground. ...
The heading indicator (or HI) is an instrument used in an aircraft to inform the pilot of his heading. ...
The horizontal situation indicator (commonly called the HSI) is an aircraft instrument normally mounted below the artificial horizon in place of a conventional directional gyro which combines both the DG and the VOR display and reduces pilot workload by lessening the number of elements in his or her scan. ...
It has been suggested that this article or section be merged into Turn indicator. ...
The turn coordinator is an aircraft instrument which displays to a pilot information about his rate of turn, rate of roll, and the quality or coordination of the turn. ...
Navigation: Horizontal Situation Indicator · Course Deviation Indicator · Inertial Navigation System · GPS • SIGI The horizontal situation indicator (commonly called the HSI) is an aircraft instrument normally mounted below the artificial horizon in place of a conventional directional gyro which combines both the DG and the VOR display and reduces pilot workload by lessening the number of elements in his or her scan. ...
An inertial navigation system measures the position and altitude of a vehicle by measuring the accelerations and rotations applied to the systems inertial frame. ...
Over fifty GPS satellites such as this NAVSTAR have been launched since 1978. ...
In Norse Mythology, Sigi is a one of the sons of Odin. ...
Other: Magnetic compass · Yaw string This article is about the navigational instrument. ...
A red yarn yaw string (top center) on the canopy of a Schempp-Hirth Janus-C glider as seen by the pilot in flight. ...
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