"Peter Clark" wrote in message
...

I chose it because it's the point where the rest of the required
information (distance to maintain from and radial crossing) is derived
from.


The I-DRO localizer provides distance information?



For the arc portion of the DRO approach, no - the DRO VOR serves the
same purpose for that approach until hitting the lead radial.


What navaid provides lateral guidance on the final approach course at DRO?
What navaid provides lateral guidance on the final approach course at MTN?


Here's a link to an approach at Antigo, Wisconsin:

http://www.myairplane.com/databases/...s/06215N16.PDF

Can GPS substitute for ADF on this approach? Please explain your answer.