Not always. AIM 1-1-9 cautions against using the back course signal unless
an approach has been authorized. At some locations, the back course is
screened off in some way to make it unavailable (don't know the details). I
would be reluctant to fly the back course in actual IMC just because it
exists.

Bob Gardner

"ilsub" wrote in message
om...
Hello.
My home base airport (KOSU) has ILS 9R approach and NDB 27L approach.
My question is,
Can they have Localizer Back Course 27L?
I am wondering if the signal is always avaialble on the reverse
side of Localizer. Or should there be something extra to have
Localizer back course?

I tested the signal while landing on runway 27L, and it seemed that
the signal was available. But there is no published instrument
approach like Localizer back course 27L approach.

Can you give me input on this?
I think Localizer Back course would be more accurate than NDB
approach.

Thank you.
Ilsub Jung