Thanks for the reply.
It is our company's SOP to set the rad alt to MDA/DH (and we don't have CAT II or higher authorization), and I question the thinking behind it. I believe the intent is to use Bar Alt (obviously) and have the rad alt as a backup, but does that mean that you take the highest indications of the two?
What would you set your rad alt to on a CAT I or NP approach? Something completely unrelated to the MDA/DH?