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Aviation Dictionary

Visual approach slope indicator (VASI)

The most common visual glidepath system in use. The VASI provides obstruction clearance within 10° of the extended runway centerline, and to 4 nautical miles (NM) from the runway threshold.

Dictionary Term

Visual approach slope indicator (VASI)

Definition

  • The most common visual glidepath system in use. The VASI provides obstruction clearance within 10° of the extended runway centerline, and to 4 nautical miles (NM) from the runway threshold.

References

  • Airplane Flying Handbook · Federal Aviation Administration · 2021