When we talk about doing
an ILS .... a standard ILS
.... we are basically talking about a CAT I ILS .... which gets us down to a minimum of 200ft DH, 550m RVR. On
the JAA mins charts (10-9X) this is normally the top
line of figures ... In the exam if the questions simply ask for the minimum for
an 'ILS' approach - they mean CAT I ILS.
In the JEPP MANUAL thee are a few CAT II ILS charts ....
a CAT II ILS will get you down to a minimum of RA 100
ft DH (Rad ALT), 300m RVR. For a CAT II approach (or
CAT III - but there aren't any charts) you ONLY need the RAD ALT figure,
however, they still give you the DA (QNH) and DH (QFE) numbers as information
only.