What does Red over Red indicate on VASI?

What does Red over Red indicate on VASI?

• A. You're above glide path
• B. You're on the glide path
• C. You're below glide path
• D. You're at the threshold

Answer: (C)

VASI conveys your vertical position relative to the glide path using two lights. The colors tell you whether you’re high, low, or on the slope. When both lights are red, you’re below the glide path — you’re lower than the intended descent angle and should adjust by climbing to intercept the glide slope. If you were above the glide path, you’d see lights that indicate you’re high (typically white on both). Seeing one red and one white usually means you’re near or on the glide path, depending on the specific VASI setup.

VASI conveys your vertical position relative to the glide path using two lights. The colors tell you whether you’re high, low, or on the slope. When both lights are red, you’re below the glide path — you’re lower than the intended descent angle and should adjust by climbing to intercept the glide slope. If you were above the glide path, you’d see lights that indicate you’re high (typically white on both). Seeing one red and one white usually means you’re near or on the glide path, depending on the specific VASI setup.