Define and differentiate between object free areas (OFA) and obstacle free zones (OFZ).
Determine the location and dimensions of the OFZ for an airport runway with category approach minimums serving large aircraft.
RDC CID/E-VI Visibility minimums lower than 3/4 mile Large Aircraft Bidirectional (runway parallel).
The OFZ is represented by letter O. The OFZ extends feet beyond the runway end. The OFZ width is feet for airport runways with category I approach.