Which mode of the ND displays the glideslope deviation diamond?

The mode of the Navigation Display (ND) that shows the glideslope deviation diamond is the ROSE ILS mode. In this mode, the ND provides an enhanced display specifically tailored for Instrument Landing System (ILS) approaches. It presents crucial information, including the localizer and glideslope indications, which are vital for pilots during an ILS approach to ensure they are correctly aligned and descending on the proper path toward the runway.

The ROSE ILS mode not only highlights the localizer lateral deviation but also prominently features the glideslope diamond. This graphical representation is essential for pilots, as it allows them to see their vertical deviation from the desired glide path, ensuring a safe and accurate approach.

In contrast, other modes like ROSE VOR, PLAN, and ARC do not offer these specific glideslope indicators. ROSE VOR mode focuses on VOR navigational aids and may display other relevant information but lacks glideslope data. PLAN mode provides a top-down overview of the flight route and does not include real-time navigational precision data like glideslope information. ARC mode presents a curved view of the surrounding airspace but, similar to the PLAN mode, does not facilitate ILS approach guidance, including the glideslope