On 3/12/2010 8:51 AM, wrote:
On Mar 12, 9:41 am, Robert Moore wrote:
" wrote

It's pretty clear that we're not supposed to go below the published MDA on
a non-precision approach, unless we can see enough to descend and land. The
MAP has nothing to do with it except that we can't continue the approach to
land after reaching the MAP.

Bob,

Bear with me on this. Are you suggesting or saying it's ok to go
below MDA BEFORE the MAP????

I was taught NEVER to descend below DH for the ILS or MDA before the
MAP for non precision approaches such as VOR alpha or LOC.

Whew...

When is the occasion when you descend below MDA on a non-precision
approach? Isn't it when you have met the requirements of 91.175?
Note: This part of the regs has to do with when you can descend
below MDA on a non-precision approach, among other things.

Are you saying that you were taught not to descend below MDA even
when you have met the requirements for descending below MDA simply
because you haven't yet reached the MAP?

That's a lu-lu of a misunderstanding.


My point to Sam was that timing alone with wind consideration is not
enough to descend below MDA which again I was taught never descend
below BEFORE the MAP.

Hint: You can descend below MDA when you've met the requirements for
doing so, as per 91.175.


DME is the constant factor to finding MAP on this approach, not timing
since there are no intersecting radials to identify MAP.

Timing helps but since GS will vary based on wind conditions, timing
ALONE shouldn't be used to determine MAP.

What? I would ask if you're kidding, but I'm afraid I know the answer
to that.



This is what I was taught for what it's worth.

You might find it useful to find a competent instructor and go over this
with him/her - for your own good.