![]() ![]() Two white lights and 2 red lights mean you’re on the established glide path on a PAPI. Boldmethod Approach Lighting Whether you're VFR or IFR, approach lights can help you identify and line up with the runway at night. Aircraft are converging and a collision hazard exists. When viewed from the landing threshold, runway centerline lights are white until the last 3,000 feet, where they begin to alternate red and white for 2,000 feet and eventually solid red for the final 1,000 feet. The visual approach path of the PAPI generally provides safe obstruction clearance within plus or minus ten degrees of the extended runway centerline and to 3.4 NM from the runway threshold. Direct a general warning signal, alternating red and green, to aircraft or vehicle operators, as appropriate, when: a. These lights are visible from about five miles during the day and up to twenty miles at night. PAPIs use lights similar to the VASI, but are installed in a single row of either two or four light units. The precision approach path indicator (PAPI) is another quite common visual glide path indicator light. Although normal glide path angles are three degrees, VASI lights at some airports may be as high as 4.5 degrees to grant proper obstacle clearance. ![]() If you see two red lights over two white lights, you’re on the approach path. The visual approach path of the VASI provides safe obstruction clearance within plus or minus ten degrees of the extended runway centerline and to four NM from the runway threshold. Fawn Creek Township is in Montgomery County. These lights are visible from 3-5 miles throughout the day and up to twenty miles or more at night. Fawn Creek Township is located in Kansas with a population of 1,618. seemed normal until he observed the alternating red and white runway lights. Runway Edge Lights: White (single row on either side of runway edge). ![]() This example shows basically everything you’ll ever see. The Visual Approach Slope Indicator (VASI) is a system of lights arranged to supply visual descent guidance information throughout the approach to a runway for VFR and IFR pilots. Runway Edge Lights: White (single row on either side of runway edge). The cargo airplane was on approach to land at night, on runway 4R. The lights available will be different depending on the runway size and equipment. ![]()
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