The visual approach slope indicator (VASI) and precision approach path indicator (PAPI) are light systems on the side of a runway threshold that provide visual descent guidance information during ...

The handful of people who gathered on the tarmac at the A.L. Mangham Jr. Regional Airport Tuesday weren’t focused on the nuanced world of aviation technology and how it would change in Nacogdoches ...

At the time of the approach, the Runway 35 runway end identifier lights and the precision approach path indicator lights were out of service.

Answer: Visual Approach Slope Indicator (VASI) lights provide a visual reference to the pilot’s position above or below the optimum vertical path. They are very important. Judging vertical path ...