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AIRPORT MASTER PLAN <br />Precision OFZ(POFZ) <br />The final OFZ surface that applies to Runway 13 is the Precision Obstacle Free Zone <br />(POFZ). The POFZ is a defined volume of airspace above an area beginning at the <br />threshold of the runway that extends to 200 feet beyond the end of the runway and <br />is 800 feet wide, centered along the extended runway centerline. The volume of <br />airspace begins at the threshold elevation for the applicable runway end. The wing <br />of an aircraft may penetrate the POFZ but penetrations involving an aircraft <br />fuselage or tail are not permitted. <br />Runway 13 is the only runway at the San Marcos Regional Airport that requires a <br />POFZ. The POFZ begins at the runway threshold elevation for Runway 13 which is <br />593.1 feet MSL. The POFZ for Runway 13 meets all established FAA standards. Since <br />the dimensions of the POFZ are not based on the RDCof a runway, no POFZ <br />impacts will occur if Runway 13 is moved to a C-III RDC. <br />Runway Hold Position Markings <br />The runway hold position markings (or holdlines) denote the entrance to the <br />runway from a taxiway and the location where aircraft are supposed to stop when <br />approaching the runway. Their location is prescribed by FAA AC 150/5300-13 <br />(current edition). They are generally located across the centerline of a given taxiway <br />within 10 feet of an associated runway hold position sign. According to FAA <br />standards, the holdlines for Runways 8/26 and 17/35 (e.g. the B-II RDC runways) <br />should be located at least 200 feet from the runway centerline. All of the runway <br />hold position markings associated with Runways 8/26 and 17/35 are located at least <br />200 feet from the runway centerline. <br />The runway hold position markings for Runway 13/31 (e.g. the C-II RDC runway) <br />should be located at least 250 feet from the runway centerline. All the runway hold <br />position markings associated with Runway 13/31 meet or exceed this standard. <br />If any of the runways are moved from their existing RDC to a C-III RDC, the runway <br />hold position markings would be required to be located 250 feet from the runway <br />centerline. Based on the layout of the airfield, all runways should be able to meet <br />this standard if necessary. <br />Facility Requirements Chapter Page 23 of 70 <br />October 2020 <br /> <br />