Visual Approach Slope Indicator (VASI) Improvements

This final report outlines, briefly, the major work accomplished during recent years in a continuing effort to improve and update Visual Approach Slope Indicator (VASI) equipment and systems being utilized _at various category airports within
the United States. Results and conclusions arrived at through a number of VASI evaluation projects are cited in so far as they pertain to the following areas of VASI development and investigation: (1) Suitability of VASI for Long-Bodied
Aircraft Use; (2) Techniques for Reducing VASI Lateral Beam Coverage; (3) Visual Approach Multiple Slope Indicator (VAMSI) Concept Development; and (4) VASI Signal Transition Zone and Color Modifications. Reference to previous and interim
reports providing detailed information about each of the subject areas is provided.