The Visual Approach Slope Indicator (VASI) provides visual descent guidance during approach to a runway.

The Visual Approach Slope Indicator (VASI) provides visual descent guidance during approach to a runway.

• A. False
• B. True
• C. Not applicable
• D. Not sure

Answer: (B)

Visual approaches rely on a fixed glide path cue that you can see as you near the runway. The VASI lights give you a color pattern that shows whether you’re on the desired descent angle, too high, or too low. By aligning your approach to that pattern, you maintain a stable glide path and adjust your descent rate accordingly, typically around a 3-degree slope. This is how VASI provides visual descent guidance during the approach, helping you visually navigate the final segment even though it’s not an instrument-based guidance system like ILS.

Visual approaches rely on a fixed glide path cue that you can see as you near the runway. The VASI lights give you a color pattern that shows whether you’re on the desired descent angle, too high, or too low. By aligning your approach to that pattern, you maintain a stable glide path and adjust your descent rate accordingly, typically around a 3-degree slope. This is how VASI provides visual descent guidance during the approach, helping you visually navigate the final segment even though it’s not an instrument-based guidance system like ILS.