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Refer to figure.
Which mode is selected on the following Navigation Display (EHSI)?
  • A
    Full VOR mode.
  • B
    Expanded NAV mode.
  • C
    Full NAV mode.
  • D
    Expanded VOR mode.
Refer to figures.
Some questions will ask you to determine the mode selected on a given ND. To do so you need to ask yourself two questions:
  • Is it a Full-Rose (360° compass rose displayed) or an Expanded Mode (90° of the compass rose displayed with ±45° on either side of the centerline)?
In this question you can see that it’s an expanded mode, so you can already eliminate 2 options.
  • Is it a VOR/ILS mode or a NAV mode? The VOR/ILS mode will simply have the VOR or ILS transmitter frequency, course, and deviation scales displayed on the top right-hand corner of the ND, whereas the NAV mode will only display the TO waypoint, the distance, and the time to that waypoint.
Here we have the NAV mode active (bottom left-hand corner). The deviation scale is not necessarily a localizer or VOR radial deviation bar (or CDI). In our example, it indicates the deviation to intercept the course to proceed towards the point ANC located at 13.5 NM from our current position.

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