yzfer wrote: RAC 9.22 specifies the requirements for a straight in approach. to sum it up, a normal decent from the FAF to the runway threshold must be possible and the final approach track must intersect the extended runway centerline within 30 degrees. When one or both apply, then straight-in minima are not published and a circling minima apply. (although this doesnt mean you have to circle if you have the required visual reference prior to the MAP). When this is the case, the first approach is becomes the A approach, the second B, and so on (eg NDB A, LOC/NDB/NDB B)
hope this helps
For non-precision as mentioned above any portion of the final approach design cannot exceed a descent gradient of 400ft/nm which translates to a 3.76deg VPA(vertical path angle). There are so many issues in relation to IAP design that one has to be qualified in TP-308 with an approved training course and more to the point, have a background/experience in design work. Penetrations of the missed approach obstacle surfaces(40:1) can get very complicated especially if having to design a combination straight/turning missed approach and the various aircraft category speeds vs turning radii. |
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