Originally Posted by
captain152
30nm is a helluva long way out to intercept a LOC. Is it legal? Sure, but it's probably gonna bounce around a bit until you get to 20-25 out.
40?! Holy balls! I hope you're VFR
They meet the same tolerances as they do once they get inside the 18nm SSV. Some localizers bounce around in pretty close. The first time I flew the ILS to 31L at KDAl I thought I was on the ski slopes doing the Giant Slolam! (but it too was within tolerance - but I wonder how a pilot feels the first time going into KDAL IMC and the A/P seems to be chasing its' tail. But then come to think about it - what do you expect with signals bouncing off the downtown skyscrapers?