Tolerances - Published Minimum Altitudes

Christopher Brian Colohan wrote:
I am currently working through the King Schools IFR DVDs in
preparation for my US IFR written. Something is really bugging me,
and I figured someone here might know the answer.... (And I am too
impatient to wait for my next lesson.)

How old are these DVD's?


In one section of this course, we learn that the outer merker and
middle marker used to matter. It used to be the case that if they
were broken you had to increase your approach minimums by some amount.

It used to be that no middle marker gave you a 50 foot penalty. That
went away back in the late eighties. If they still talk about that,
they need to remove that.

The outer marker is specifically required by regulation. You can
substitute another fix that happens to be in the same place. Our local
TERPS expert can get into the why, but there's no particularly strong
reason other than the regs say it is a component of an ILS.

Ronald Natalie writes:

Christopher Brian Colohan wrote:
I am currently working through the King Schools IFR DVDs in
preparation for my US IFR written. Something is really bugging me,
and I figured someone here might know the answer.... (And I am too
impatient to wait for my next lesson.)

How old are these DVD's?

About 2 months old.

In one section of this course, we learn that the outer merker and
middle marker used to matter. It used to be the case that if they
were broken you had to increase your approach minimums by some amount.

It used to be that no middle marker gave you a 50 foot penalty. That
went away back in the late eighties. If they still talk about that,
they need to remove that.

What they say is roughly "this used to give you a penalty, but now it
doesn't. So one of the questions will have wrong answers talking
about the penalty this gives you, and you can ignore those wrong
answers."

The outer marker is specifically required by regulation. You can
substitute another fix that happens to be in the same place. Our
local TERPS expert can get into the why, but there's no particularly
strong reason other than the regs say it is a component of an ILS.

Ok.

Chris

It used to be that no middle marker gave you a 50 foot penalty. That
went away back in the late eighties. If they still talk about that, they
need to remove that.

I hate to sound stupid, but what exactly is this 50' penalty for a middle
marker--either now or in the past?

Kobra





The outer marker is specifically required by regulation. You can
substitute another fix that happens to be in the same place. Our local
TERPS expert can get into the why, but there's no particularly strong
reason other than the regs say it is a component of an ILS.

"Kobra" wrote in message
news

I hate to sound stupid, but what exactly is this 50' penalty for a middle
marker--either now or in the past?


Decision height was increased by 50 feet if the marker was unavailable.