part-150-for-dummies

A presentation slide titled 'Part 150 for Dummies' from SEA-TAC NOISE.INFO, showing a map of the Sea-Tac Airport area with overlapping noise contours comparing 2018 (red) and 1998 (blue) boundaries. A caption states 'Contours are smaller due to quieter aircraft,' and a QR code is visible in the lower right corner.
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