Bosses need to see the glide path back to normality.

They descended below the standard glide path and minimum altitude before hitting trees.

A smoke canister attached to his foot had malfunctioned and thrown him off his glide path.

It's a computer warning that you're off the glide path.

The pilot had to fly so that the reflected lights appeared central in the mirror, the mirror being angled to three degrees, the appropriate glide path.