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wsieffert

XML Approaches Success and Questions

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I've just developed my first XML Approach, allowing the user aircraft to be cleared for the STAR -- JAWBN NINE into Seattle's 16L. The new approach seems to be working well, Control allowing me to select JAWBN as an alternate approach to 16L, and I've flown it right down the line to the runway. However, before going on I want to see if I can clarify a few things with those who are experienced in developping these approaches....1. One of the legs I've classified type "VM" "Heading to manual termination." This is the turn to heading 70 degrees once at ALKIA, and expect vectors to final approach as detailed on the STAR. Because approach has already handed me over to tower once I commence the transition at JAWBN, there are no further vector instructions at this point, I just have to fly the aircraft onto the localiser intercept myself. Am I using the correct type for this leg, or is there anything I can do that will again allow ATC to vector me once I turn onto heading 70 degrees, as in real world?2. Is the new approach supposed to appear as an option in the GPS procedures?? I have noticed that not all approaches in the GPS are given as options in the ATC window, and my new approach is not listed in the GPS but does come up in the ATC window. I have nominated GPS Overlay as TRUE.3. Can someone explain Theta and Rho to me in plain language. I notice that it is optional in some legs, required in others. MS place it in some of their legs where it is optional . . .why?? What difference does it make?4. Can I add or define new waypoints in the XML -- ie. ones that do not exist in the default FS GPS?5. Do AI aircraft follow these new approaches, or are they only used by user aircraft?I have included as an attachment my XML file, as well as links to 16L AIP and JAWBN NINE STAR in case this info is required.http://www.airnav.com/depart?http://204.10...2/00582I16L.PDFhttp://www.airnav.com/depart?http://204.10.../00582JAWBN.PDF

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Building approaches is a time consuming project. One needs to understand what the GPS vendors are using to make the approaches. I recommend you search the web for "ARINC 424" and download anything you can find. Three documents I found helpful are 03-115.pdf, iss3_0.pdf, and viewdoc.pdf.If your email system can handle a 2.5MB zipped file, I can send these to you. It has been quite a while since I was reviewing approaches, and I don't have the time to review them at the moment.wsieffert@cfl.rr.comW. Sieffert

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