The glide slope on an instrument landing system provides guidance along which axis?

The glide slope on an instrument landing system provides guidance along which axis?

• A. Lateral axis
• B. Vertical descent axis
• C. Temperature axis
• D. Altitude axis

Answer: (B)

Glide slope provides vertical guidance. It steers the aircraft along the vertical plane of the descent, helping you follow a fixed glide path to the runway. The lateral guidance—keeping you on the runway centerline—is provided by the localizer, not the glide slope. The glide slope angle is typically about 3 degrees, and it is displayed as vertical deviation to keep you on the correct descent path. There isn’t a temperature axis used in this system, and altitude is monitored alongside the vertical guidance rather than representing a separate guidance axis.

Glide slope provides vertical guidance. It steers the aircraft along the vertical plane of the descent, helping you follow a fixed glide path to the runway. The lateral guidance—keeping you on the runway centerline—is provided by the localizer, not the glide slope. The glide slope angle is typically about 3 degrees, and it is displayed as vertical deviation to keep you on the correct descent path. There isn’t a temperature axis used in this system, and altitude is monitored alongside the vertical guidance rather than representing a separate guidance axis.