In aviation navigation, GS stands for which term?

• A. Glideslope
• B. Ground speed
• C. General system
• D. Gyroscopic stabilizer

Answer: (A)

GS stands for Glideslope. This is the vertical guidance path provided by the instrument landing system that tells you the proper angle to descend to the runway, typically around 3 degrees. By following the glideslope, you maintain a stabilized descent as you approach the runway, and your cockpit instruments show deviations up or down so you can correct to stay on the path. The ILS combines a localizer for horizontal guidance with the glideslope for vertical guidance, giving you a precise course to the runway. While ground speed is another common meaning for GS, it refers to how fast you’re moving over the ground and is used for timing and fuel calculations, not for the vertical guidance during an ILS approach. The other terms don’t describe the approach path navigation used in this context.