I came across this section on runway holding position marking while reading Jeppesen Airway Manual, which got me very confused.
My question is: Is Pattern B describing another type of runway holding position sign other than the one described in Pattern A? Or is it just describing the ILS critical area boundary marking for CAT II & III approaches? I'm asking this question because I've never heard in my whole aviation career that there are "two" runway holding position markings, nor seen one.
I’ve never seen the critical area hold bars referred to as a type of runway hold bars, but they serve the same general purpose when the critical area needs to be protected, so I can understand the point of describing them together.