DNL65 For Dummies

There is an area around an airport where the FAA says the sound level measures at 65 decibels ‘DNL’ (Day Night Level). That area is referred to as the Noise Boundary or just ‘DNL65’ and all big airports have a noise boundary map. The one question we get most is “Is my house eligible for

Runways

We love this image because it makes clear the confusing nomenclature of runways. Intro Sea-Tac is a category IIIb certified airfield, allowing operations in all but the worst conditions. There are three runways: Runway #1 16L/34R – 11,901 feet Runway #2 16C/34C – 9,426 feet Runway #3 16R/34L – 8,500 feet The southern ends of