Originally Posted by
M609
There has been a few mentions of higher approach minima.
How much lateral error in navigation is that meant to remedy? I mean, obstacles close to centerline can sort of occur at 3000ft above OCA as well as at OCA
If you look at UK approaches and consider a 5 mile lateral error and apply the recommended IMCr limits, there are very few actual collision risks and those that do exist seem (from my limited look at the plates) to be linked to being early on a step down fix. If you again look at any required routings (SRD/SID/STAR) to the platform altitude in the UK, you can, for the most part be +/-20 miles and still be ok
If you apply the same logic to approaches throughout Europe, there are a number where it does make a difference.