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Which combination accurately lists the sources of information that the EFIS display receives?

1. Inertial Systems (INS/IRS)
2. Flight Management System (FMS)
3. Weather Radar (WRX)
4. Air Data Computer (ADC)
5. Radio Altimeter
6. Direct Reading Compass

  • A

    1, 2, 3, 4, 5 and 6

  • B

    1, 2, 3, 4 and 5

  • C

    1, 3 and 5

  • D

    1, 3, 4 and 6

Refer to figure.
An Electronic Flight Instrument System (EFIS) is a flight deck instrument display system in which the display technology used is electronic rather than electromechanical.

A typical EFIS system comprises a Primary Flight Display (PFD) (Electronic Attitude Direction Indicator (EADI)) and an Electronic Horizontal Situation Indicator (EHSI) (Navigation Display). In some designs the two displays are integrated into one.

It draws information from the following sources:

  • Inertial Navigation Systems (INS / IRS);
  • Flight Management Systems (FMS);
  • Weather Radar(WXR);
  • Radio Altimeters; and
  • Air Data Computers (ADC).

Therefore, the correct answer is 1,2,3,4 and 5

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