040405 Jt PH Cond Use, Develpo Agmt, Zoning, etc.-Geneva Commons Proj 200 E. First American Way

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airports. The FAA Orders referenced above contain criteria utilized by FAA to formulate, review, approve and publish instrument approach and departure procedures for airports and runways. These procedures are developed to ensure that aircraft are provided safe clearance over man -made or natural obstacles when flying during IFR weather conditions. Additional obstacle clearance is built into instrument procedures that are developed for airports located in and near mountains or other precipitous terrain. The procedures utilized by FAA for Flight Procedure analysis, development and OE evaluations are specified in AIRSPACE AND PROCEDURES, (FAA OrderA8260.19C). Chapter 5 of 8260.19 addresses Obstruction Evaluations (OE). See attachment (D). The FAA through their regulatory procedures has already determined that neither the instrument approach or departure procedures are impacted by the proposed Geneva Commons projects. This independent Geneva Commons analysis presented herein is based on the existing FAA IFR procedures and re- evaluated for POTENTIAL IMPACT on Instrument approach procedures to Runways 19R /L and 01 R /L. Likewise, departures were evaluated using current FAA Departure Procedures published for John Wayne Airport, (SNA). The criteria used is the same as the FAA is supposed to use in its determinations. 1.3 Approach Procedures An instrument approach procedure can be classified as precision or non - precision. A precision approach provides electronic glide path (vertical guidance) in addition to directional information to the pilot, whereas a non - precision approach provides only directional guidance. A precision approach provides the information via navigational aids to ensure that an aircraft is at a specific altitude at a specific point. Vertical guidance provided in a precision approach allows descent to a lower altitude than a non - precision approach. For a non - precision approach, a barometric altimeter is used for vertical (descent) information. Barometric altimeter settings involve readings of elevation above Mean Sea Level (MSL). 1.3.1 Precision Approach Procedures The term DA/DH (decision altitude /decision height) refers to the decision point on a precision approach at which a decision must be made during a precision approach to either continue the landing maneuver or execute a missed approach. The term decision altitude (DA) is the height above mean sea level (MSL) of the decision point for a Category I approach. The term decision height (DH) is the height above threshold for a Category II /III approach at which a decision must be made to either continue the landing maneuver or execute a missed approach. FAR Part 91.175 requires that an instrument approach descent may not continue below the DA/DH unless: (i) The aircraft is in a position to make a normal approach to the runway; and, 8