# What values will I use for circle-to-land in categories A and B? RVR 1800m or RVR 2200m?

What values will I use for circle-to-land in categories A and B? RVR 1800m or RVR 2200m? And if I am using them, why are the visibility values such as 1500m-1600m determined?

Before you can do a circling approach, you must do either a either CDFA straight in, or a non-CDFA approach to runway 22, and then circle to land on a different runway.

The circling minimum are dependant on which straight-in approach you conduct, and also dependant on the availability of ALS lighting:

Appr. CAT CDFA ALS MDA Vis. / RVR
A yes 1100' 1500m
B yes 1100' 1600m
A no yes 1100' 1800m
B no yes 1100' 1800m
A no no 1100' 2200m
B no no 1100' 2200m
• Thank you for the tabular reply, captain. I missed that I had to do a straight-in-landing approach first to be able to circle-to-land. But the phrase "approach lights have no effect on circling minimums" in the Jeppesen Manual confuses me. Does "minimums" here represent 1100 feet of MDA? I would be very happy if you reply. (I've attached the image of the expression in Jeppesen to the question.) Feb 26 at 7:31
• That confuses me as well. “Minimums” includes ceiling and visibility. Maybe someone else here might know the answer. Feb 26 at 12:06
• I think what is meant here is the following: Whether there is ALS in direct approach or not affects the RVR or visibility value, but there is no such distinction for circle-to-land. When we look at the circle-to-land section, we see that there is no separate MDA for lighting. That's how I interpreted it, captain, what do you think? Feb 26 at 14:30
• I understand the 1st note given as follows: Since we will make a straight-in landing approach before making a circle-to-land, we also need to take into account the lighting systems that affect the straight-in landing minimum values. However, this is a situation that we will only evaluate when the circle-to-land visibility or RVR value is lower than the straight-in landing values. It would be my pleasure if you approve my interpretation, captain. Feb 26 at 14:35