What does the description of note 1 that I marked in the image mean? What exactly does the expression "higher straight-in minimums" describe as "higher" relative to which value? And how and when do I use RVR 1800m or RVR 2200m as the circle-to-land minimum if these are the intended values? Because there is "approach lights have no effect on circling minimums" information for the ALS system.
For Cat B, your required circling vis is 1600m, UNLESS the ALS is out of service (and the non-CDFA case) - in which case you need 2000m (which is the "higher straight-in minimums").
The ALS-out mins aren't higher than the Cat C or D circling mins, so those lines don't have the "1" note, just A and B.
It makes sense that if you need "this" vis when the ALS is out of service, you don't ignore that higher requirement just because you're circling.