bhill wrote:Good Day All, I am curious about approaches during inclement weather. I live about 20 miles north from KSEA, and it seems that during times of inclement weather, rain, clouds.. that aircraft are at a MUCH lower altitude while on approach. Why is this? One would think that you would want to be above the rain, etc as long as possible, and to have more altitude to work with if something did happen...gusts, shear, etc.
atcdan wrote:In many cases when conducting a visual approach on a clear day, aircraft will be turned onto final 15-20 miles out and already on the glideslope sometimes even above it. During IMC aircraft will be vectored to intercept the glideslope from below, and when simultaneous parallel approaches are in use, one runway is turned onto final at 2000, the other at 3000. This is done to ensure separation in the event one or both aircraft overshoots the final, where as on a clear day they can be visually separated from one another.
Very basic explanation, but the aircraft are flying a longer, lower final in IMC than in VMC.
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