Basic question here...
I understand that the localizer is a system involving a radio signal (frequency?) used for lining up an aircraft with its intended runway heading.
When an aircraft "captures" or "intercepts" the localizer, what cockpit indications are there that this has been achieved? Is the process the same when the glidescope "comes alive"?
Also, when landing using a visual approach, are the localizer and glidescope (despite being part of an ILS approach) still used for initial guidance?