Pressing which pushbutton causes the localizer and glideslope scales to appear on the associated PFD?

Pressing which pushbutton causes the localizer and glideslope scales to appear on the associated PFD?

• A. VOR
• B. ARINC
• C. LS
• D. HDG

Answer: (C)

Locating the ILS guidance on the PFD is controlled by a dedicated pushbutton labeled for Localizer/Glide Slope. When you press this LS button, the PFD shows the lateral deviation from the localizer and the vertical deviation from the glideslope as bars, making it easy to track the approach path and stay centered on the ILS. The other options don’t toggle these LOC/GS scales: VOR affects VOR guidance display, ARINC isn’t a display-toggle pushbutton, and HDG switches the aircraft into heading mode rather than showing ILS deviations.

Locating the ILS guidance on the PFD is controlled by a dedicated pushbutton labeled for Localizer/Glide Slope. When you press this LS button, the PFD shows the lateral deviation from the localizer and the vertical deviation from the glideslope as bars, making it easy to track the approach path and stay centered on the ILS. The other options don’t toggle these LOC/GS scales: VOR affects VOR guidance display, ARINC isn’t a display-toggle pushbutton, and HDG switches the aircraft into heading mode rather than showing ILS deviations.