According to the U.S. Navy: http://www.efdlant.navfac.navy.mil/Lantops_15/topics/Facilities/NAVAIR_51-50 AAA-2.PDF
see Section 003-11 for VASI, Section 003-12 for PAPI The first (downwind) VASI bar should be 600 feet from the runway threshhold, and subsequent bars should be 700 feet upwind. Most civil installations use a three-bar system, with three lights in the first and second bars, and two lights in the last one. VASI bars are located on both sides of the runway, so a three-bar system has 6 bars and 16 lights. In each bar the light nearest the runway is 50 feet from the runway edge. The other lights(s) are spaced 16 feet apart. I deduce from the drawing that the first bar lights point at an angle of 2.5 degrees above the horizon, and the other two point at 3 degrees. Dave Culp _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
