John,

Not really answering your question, but note that descending below DH is (by
definition if you think about it) legal even if you see absolutely nothing.
MDA means don't go below this altitude, but DH means make you decision here
and immediately start to get 'er going up which implies some time spent
below DH.

Hilton


"John" wrote in message
...
If assigned IFR altitudes can be considered to have a tolerance of +/- 200
ft before you are "busted", what applies to published minimum altitudes
other than DH and MDA on approach plates? Most people will say that you
are not supposed to descend any amount below the DH/MDA altitudes. Does
this also apply to procedure turn altitudes, transitions etc.? Is there a
tolerance that is in effect +200 -0 that applies?

In practical terms, whereas a decent of 100 ft below an assigned altitude
will cause no problems, is such a decent of 50-100' below a published
procedure turn altitude, transition altitude enough to get in trouble?

John