So WHERE does one find the critical obstruction information so that we can descend below the circling minima to the magical 300' above obstructions?
As I've done in the past for running RTOW/RLW tables, ask the guy who designed the procedure. Even then, some of the design assessments are not as precise as I might desire to go off swanning around at low level in poor visibility ... but, then again, I am a fairly conservative sort of chap.