If you are high and to the left of the ILS course, what displacement from the localizer centerline and glide slope does this indicate?

When you are positioned high and to the left of the ILS (Instrument Landing System) course, it indicates a certain displacement from both the localizer centerline and the glide slope. Being "high" refers to your altitude being above the glide slope, while being "to the left" means you are not aligned with the runway centerline and are off to the left side.

In an ILS approach, the glide slope provides vertical guidance, while the localizer provides horizontal alignment. Therefore, if you are displacing to the left, it means you are not centered on the localizer, and being high means you are above the required descent path.

Figure 141 effectively illustrates this specific scenario. It shows the aircraft's position in relation to the ideal flight path, indicating how much the aircraft is offset horizontally (to the left) and vertically (above) from the intended approach trajectory. Understanding these parameters is crucial for effective maneuvering during an approach to ensure alignment correction can be made before reaching the runway.