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(b) Exhibit 23 of the Airport Study ("Sight Lines from Air Traffic Control Tower") shows the relationship between the San Carlos Airport Air Traffic Control Tower ("ATCT") and the KNBR tower. It also depicts sight lines over the 10-story office building and the Oracle building. The exhibit shows that the 1 O-story building would not interfere with the ability of air traffic controllers to see aircraft operating in the vicinity of the KNBR radio tower. Aimraft approaching the Airport in this area are normally at an altitude of around 1,200 feet MSL. At a distance of 12,000 feet from the control tower, an aircraft would have to be at an altitude of less than 332 feet (and in direct alignment with the tower and the 10-story building) to be hidden from view. With respect to the Oracle building, an aircraft would have to be operating at or below 308 feet. Aircraft in this area typically operate at an altitude of over 500 feet. (c) The 10-story building also would not limit or impair the ability of air · traffic controllers to see aircraft operating in the pattern immediately behind (i.e. north of) the 10-story building. Arriving aircraft on base to final over the diamond-shaped waterway would be approximately 6,080 feet from the ATC tower. At this distance, the aircraft should be at a minimum altitude of at least 300 feet MSL. The Airport Study supports the conclusion that an aircraft flying as low as 200 feet over the diamond-shaped waterway and behind the 10-story building still could be seen by air traffic controllers. 3.10.5 Potential Effect: Aircraft approaching the airport from the vicinity of the KNBR tower would not be able to see aircraft climbing out after departure on Runway 30 behind the Project buildings, especially the 1 O-story office building. Findings: The GID hereby makes finding (1). Facts in Support of Findings: (a) Exhibit 24 of the Airport Study shows the line-of-sight from the vicinity of the KNBR tower over the 1 O-story building to the extended centerline on Runway 30. The exhibit shows that arriving aimraft in the vicinity of the KNBR tower would have to be below 700 feet MSL for the 10-story building to block the line of sight from the aircraft to the extended runway centerline. Aircraft in this area typically are at an altitude of about 1,200 MSL. Similarly, aircraft in the traffic pattem would also have an unobstructed view of the airport and extended runway centerline. (b) The existing Paragon building, because of its position nearer the extended runway center line, already impedes the line of sight from the KNBR tower in this area. The Project would not impair this line of sight. -24- GIDEIRFD.DOC 7/23/96 5:44 PM