The Port of Seattle's StART Aviation Noise Working Group analyzed glideslope options for Runway 34R at Seattle-Tacoma International Airport. The presentation covers the existing Instrument Landing System, which uses a 2.75-degree glideslope rather than the standard 3-degree angle, along with alternative navigation systems and path indicators. The group evaluated alternatives and developed a recommendation aimed at addressing community noise concerns associated with arriving aircraft.

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A presentation prepared for the StART Aviation Noise Working Group analyzing the glideslope characteristics of Runway 34R at Sea-Tac Airport. The document covers the components of the Instrument Landing System (ILS), noting that the existing 34R ILS has a 2.75° glideslope rather than the standard 3°. The agenda includes discussion of ILS, RNAV, Precision Approach Path Indicator, alternatives, and a recommendation.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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