A navigation Display (ND) provides a mode selectable flight progress display. The different display modes of the ND are the following:

• EXPANDED, MAP, or ARC mode: an expanded view of the compass rose, with the current heading at the top (“heading-up orientation”)
• VOR, FULL VOR, or ROSE VOR mode: the entire compass rose in a heading-up orientation.
• APP or ROSE ILS mode: the entire compass rose in heading-up orientation, with only the ILS localiser visible, an additional glide slope indication appears to the right
• PLAN mode: the upcoming flight plan waypoints are depicted in a “north-up” orientation, the display range can be adjusted.

The MAP (or ARC) mode of the ND usually displays information such as the selected and current track (or heading), the TAS and GS, the wind direction and speed, next waypoint distance, and weather radar information.

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° either side of the centerline)?

Knowing this, it can only be figure 1 or 6 (full rose mode).

• 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.

You’re looking for an ILS mode, where the frequency of the ILS is indicated at the bottom of the display. Figure 1 indicates ‘VOR’ and figure 6 indicates ‘ILS’ with its associated frequency on the right of the ND. Therefore, the correct ND is represented in figure 6.