I am not so sure. See LVK ILS 25R (California), why is ADF required here?
Almost exclusively, TRACY is used as the IAF for this approach. Maybe if an
NDB is designated as an IAF, then ADF is required whether or not other IAFs
exist.

"Greg" wrote in message
om...
I'd guess because the only IAF is the NDB.

-greg

"S. Ramirez" wrote in message
om...
Does anyone know why the Mansfield OH MFD ILS RWY 32 approach plate has
ADF
or Radar Required written on it?

Thanks.

Simon Ramirez