EDIT 2: Shouldn't the Cat C and D be 3 and 4nm?
Good comment, add it to living with the FAA....
RNP are coded procedures, there is no circling...you are on it or not.
I dont know why there are the differences at Lewiston, and I really dont want to get into laying out the circling diagram...but I will leave you with this figure 2 to ponder, consider the different variables, (and really be concerned about how many mistakes can be found on charts or in the navdatabase)
