As someone has raised the thorny topic of conflict between ICAO and TERPS circling procedures, I wonder if a kind soul could answer my query on the subject.
I work for a European JAA operator. I fly regularly to the USA and use Jeppesen charts. Approach charts for US airfields are constructed to TERPS criteria and fully annotated as such. I am not permitted to use TERPS minima and to this end have to use the standard TERPS charts in conjunction with JAA minima which are provided by Jeppesen on charts designated 10-9X. All fine and dandy; the circling minima on the 10-9X, annotated JAA, includes the higher JAA/ICAO speeds, but the question is on the defined area. If the defined area is increased to ICAO/JAA standards, who does the obstacle clearance survey? It isn’t Jeppesen, as their disclaimer clearly states that they only reproduce data provided by the state (with minima converted). So does the FAA produce defined area obstacle clearance data based on ICAO criteria in addition to that based on TERPS? If not, where does the information come from?
Thank you