The last line in the table has exterior none and cockpit(interior) x5,x6, but the statement says →
As you can see, the cockpit does not have any LODs to match exterior x5/x6 as these are too small on screen to be noticeable. On smaller aircraft it may be that you don’t even need an interior LOD from LOD x3 onwards.
am I reading it wrong? I think they are switched?