ILS critical area when the tower is closed?

Steven P. McNicoll wrote:
"A Lieberman" wrote in message
...

I've seen it myself. One that comes to mind is HKS.

On the approach plate, says when tower closed, GS unusable.



Any idea why the GS is unusable when the tower is closed? I'd expect to
find the GS on the east side of the runway, is that where it is?



I believe ELM switches the ILS from 6 to 24 depending on the wind
direction. I've never landed after midnight when the tower closes, but
I wonder if they leave the ILS on and leave an ATIS message as to which
runway is ILS active? Never thought about it before this thread. I
guess I always assumed they would turn off the approach when the
controllers go home, but maybe not.


Matt

Matt Whiting wrote:
I believe ELM switches the ILS from 6 to 24 depending on the wind
direction. I've never landed after midnight when the tower closes, but
I wonder if they leave the ILS on and leave an ATIS message as to which
runway is ILS active?

That's exactly what they do at HPN.

"Matt Whiting" wrote in message
...

I believe ELM switches the ILS from 6 to 24 depending on the wind
direction.


Both localizers are on 109.1, only one can be selected at any time.



I've never landed after midnight when the tower closes, but I wonder if
they leave the ILS on and leave an ATIS message as to which runway is ILS
active?

Possibly, but all they'd have to do is advise New York Center which ILS is
up.



Never thought about it before this thread. I guess I always assumed they
would turn off the approach when the controllers go home, but maybe not.


These things are turned off for maintenance or runway closures, that's
pretty much it.