I went through the same thing when my local airport had a brand new ILS
commissioned. It came out with ADF required and other airports in the
area with ILSs didn't. I wrote to the FAA and explained that the FAF
could be defined by the combination of any two, localizer, cross radial,
and marker beacon. The marker beacon is colocated with the NDB. At first
the FAA thought they didn't optimize the approach correctly and
submitted a change. They had you go missed approach to a VOR 20+ miles
away and hold. It required almost 60 miles of flying. I said disregard
my message. The current ILS has a ADF required. I cannot remember the
exact answer from the FAA, but the ADF was simpler than using the
localizer and the VOR cross radial. Go figure. I have a IFR approved
GPS, so I quit complaining. And I apologized to the airport manager for
almost screwing up his new approach.

Ross

"S. Ramirez" wrote:

Does anyone know why the Mansfield OH MFD ILS RWY 32 approach plate has ADF
or Radar Required written on it?

There is speculation on another forum that ADF is required to establish the
FAF for the localizer approach, but I argued that it is not required for the
ILS approach, since intercept of the glideslope is the "FAF" for the ILS
approach. The approaches we have in FL are similar but do not have ADF or
Radar Required written on them.

I can understand that without radar vectors, setting up for the ILS approach
would require ADF so that one overflies the NDB outbound, stays within ten
miles, and then comes back to intercept the glideslope; therefore, radar
vectors or ADF would be required for this approach. But this is obvious on
other approach plates without spelling it out. Why is this verbiage written
on this approach plate?

Thanks.

Simon Ramirez


"S. Ramirez" wrote:

Does anyone know why the Mansfield OH MFD ILS RWY 32 approach plate has ADF
or Radar Required written on it?

There is speculation on another forum that ADF is required to establish the
FAF for the localizer approach, but I argued that it is not required for the
ILS approach, since intercept of the glideslope is the "FAF" for the ILS
approach. The approaches we have in FL are similar but do not have ADF or
Radar Required written on them.

I can understand that without radar vectors, setting up for the ILS approach
would require ADF so that one overflies the NDB outbound, stays within ten
miles, and then comes back to intercept the glideslope; therefore, radar
vectors or ADF would be required for this approach. But this is obvious on
other approach plates without spelling it out. Why is this verbiage written
on this approach plate?

Thanks.

Simon Ramirez