CAT I : dicision height not lower 200' and RVR not less than 550m , can be manually flown and land.
CAT II : dicision height(DH)below 200' , but not lower than 100' and RVR not less than 300m ( autoland )
RVR not less than 400m (manual landing)App flown by autopilot..man landing(coupled app)
CAT III a dicision heigth(DH) lower than 100',but RVR not less than 200m-autoland
CAT III b dicision(DH) height lower than 50' or ''NO'' (DH), but RVR not less than 75m-autoland.
I think I got it right.
