wrote in message
...

The OBS has no meaning to a CDI when using a localizer.
It's left or right of the localizer beam where "left and right" is
defined
as looking inward on the front course. It's only when the pilot's
left
and
right is reversed (as they are looking inward on the back course) that
things
are "reversed."

That is all true.



Almost.

The OBS has much meaning to a CDI when using a localizer course, if
you just know how to interpret said meaning.

It has no meaning to the CDI, which after all is an inanimate object. If you
are properly trained it should have some meaning for you.