Be that as it may be, FAA flight inspection is continuing to remove or not accept VDAs on many NPAs in the U.S. If the runway doesn't have an APV there are obstacle issues in the visual segment. If flight inspection judges them significant the VDA is removed (or disapproved on new NPAs, such as LP and LNAV), thus there will be no vertical path such NPAs in the FMS.
What do they achieve by doing this?
The whole point of providing VDA's is to give those without FMS's a flighting chance of flying a stable approach, and those with FMS's the ability to use vertical guidance...which according to ICAO is more safe.
Have they not just increased the risk of instability on the approach?
There are other ways to deal with obstacles in the visual segment. Removing the VDA is a poor option.
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