Ding ding ding. The intent of having the cross-hatches is to indicate a high or low altitude procedure. But there's a caveat...
Exactly. What is a low or high (or lo/hi) SID? If you think that a high altitude instrument approach starts in the high enroute structure, then it's plausible that a SID that ends in the low or high enroute structure is therefore a low or high altitude procedure. For foreign procedures, the cross-hatching indicates this.I understand high and low approaches. I don’t understand high and low SIDs.
This is just reinforcing my belief that anyone who designs an excessively convoluted instrument approach should be forced to fly the full procedure to minimums with compound EPs.NAS Corpus Christi has examples of high procedures that start in the low enroute structure. Furthermore, FAA SIDs may end in the high enroute structure but they don't have cross-hatches. So what's the point? For CONUS, the half cross-hatching is to indicate that the procedure can be found in both a low altitude book and a high altitude book.
Procedure designers typically have no flying experience. They mostly come from the ATC world.This is just reinforcing my belief that anyone who designs an excessively convoluted instrument approach should be forced to fly the full procedure to minimums with compound EPs.