If I understood your response correctly, the approach may not be flown
without having either an ADF or an IFR-certified GPS.

It seems to me like very poor planning to design approaches such as the two
I previously mentioned (Rochester, NY KROC ILS RWY 4 or VOR RWY 4). A
pilot could have a day (1,000 foot ceiling) with an extremely low
probability of needing to execute the missed and not be able to "legally"
fly the approach if the ADF was inop.

Has anyone tried to get an approach modified, e.g., get a missed approach
procedure changed to eliminate the ADF requirement?

wrote in message ...

ATC cannot waive Part 97. But, you can substitute an
IFR-certified GPS for the ADF because Flight Standards has issued a
national policy
letter permitting that.

And, most IAPs do not have a non-radar alternate missed approach
proceddure. It's
either the published missed or radar vectors.