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What is one of the main purposes of a CDU?
  • A
    To monitor the engine(s) of an aircraft.
  • B
    To automatically tune the aircraft radio(s).
  • C
    To input data into the FMS.
  • D
    To control the electrical system of an aircraft.

Refer to figure.
FLIGHT MANAGEMENT SYSTEM

Flight Management Systems (FMS) are designed to improve navigation, aid fuel efficiency and to reduce crew workload.

CONTROL DISPLAY UNIT (CDU)
The primary function of the CDU is to act as the interface between the aircraft and the crew.

The CDU can be used to command completely automatic control of the aircraft or semi-automatic with varying degrees of pilot involvement including full manual control.

An alpha/numeric CRT screen dominates the upper part of the unit, while the lower part has a keyboard. Using the keyboard, the flight crew can enter the desired vertical and lateral flight plan data into the Flight Management Computer.

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