Curtis L. Olson wrote:
There are probably cases where the localizer isn't really perfectly aligned with the runway, or intentionally misaligned to avoid obstacles or terrain.
You are correct -- for a non-precision, LOC-only approach, the localizer can be as far as 30 deg off the runway heading either way and still be considered a straight-in approach. There are also LOC-only circling approaches, like the one into Toronto City Centre airport over Lake Ontario.
So I have made this configurable for those that trust the data more than I do. Just set "/sim/navdb/auto-align-localizers" to true/false in the preferences file to turn this feature on or off in the code.
I'd be more comfortable fixing the data -- couldn't we run the same calculations there in batch mode and try to find the misaligned ones? In the meantime, let's make the default value for this property 'false'. Another problem is that the DAFIF data for the localizer might be right while Robin's data for the runway is wrong, and kludging at runtime will make it harder to spot the mistake.
All the best,
David
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