The visual approach slope indicator (VASI) is a system of lights on the side of an airport runway threshold that provides visual descent guidance information during approach. These lights may be visible from up to 8 kilometres (5.0 mi) during the day and up to 32 kilometres (20 mi) or more at night.
Famous quotes containing the words visual and/or approach:
“I may be able to spot arrowheads on the desert but a refrigerator is a jungle in which I am easily lost. My wife, however, will unerringly point out that the cheese or the leftover roast is hiding right in front of my eyes. Hundreds of such experiences convince me that men and women often inhabit quite different visual worlds. These are differences which cannot be attributed to variations in visual acuity. Man and women simply have learned to use their eyes in very different ways.”
—Edward T. Hall (b. 1914)
“I have watched ... many literary fashions shoot up and blossom, and then fade and drop.... Yet with the many that I have seen come and go, I have never yet encountered a mode of thinking that regarded itself as simply a changing fashion, and not as an infallible approach to the right culture.”
—Ellen Glasgow (1873–1945)