Thank you for setting me on the track to revisit the topic of DA vs DH which, it turns out, is the elementary topic that leads to understanding more about Cat I vs Cat II, etc. etc. Now I understand that the MDA field in the A310 FMS is the same as DA and calls for BARO altitude when applicablle to the type of approach. And, the DH field requires a RADIO altitude when applicable to the type of approach (or just enter it anyway since the aircraft is so equipped). I think I read somewhere that if you are executing an autoland the DH shouild be set to “zero”?
And, yes, the 737 is easier for me in the sense I can choose either BARO or RADIO (depending on the type of approach) at one entry point in the FMS.
Thank you again for the time you have taken to help me learn more.