In a previous article, zatatime said:
On Thu, 14 Oct 2004 00:06:18 +0000 (UTC),
(Paul Tomblin) wrote:
the executive summary is that they put the step down to "provide
a constant descent rate on the procedure". Weird, eh?


Not only weird, but it does not answer our question. He has described
very well Why the approach was created this way, but in no way
communicates How a non-DME equipped aircraft can descend below 1160'
on a straight in LOC 23 approach. Even if it were possible to descend

John Haggerty raised that very question with him, and his response it that
because this is one of only three AFRC joint use airfields, they're going
to have to think about how to publish their procedures so that USAF and
civil pilots can both understand it. He says that in this case, they'll
be changing it to two plates - one called "ILS RWY 23" for the S-ILS,
S-LOC and CIRCLING, and one called "ILS or LOC/DME RWY 23" for the S-ILS
and S-LOC/DME and CIRCLING/DME. The first plate won't have the 1160
restriction, but will instead allow you to descend to the MDA after BELCH,
and the second will have a step down fix.

I'm not sure if having two plates for the same ILS will help or hurt
matters.

Personally, I wonder why they just don't move the step down fix closer to
the MAP, and make the intermediate altitude 900 feet. That was my first
reaction to Tim's first answer, and one that was suggested by John in his
followup question. But since Tim's first answer about the step-down fix
had some mention of preventing people from busting the circling MDA, I
doubt that this would satisfy that goal.


--
Paul Tomblin http://xcski.com/blogs/pt/
When the revolution comes, we'll need a longer wall.
-- Tom De Mulder